I have always had great respect for the various foundations, museums, ect, who have donated their time and money to restore aircraft such as the Comet. I tip my hat to the volunteers who donate their time, which of course is the most valuable commodity
@@johnnunn8688 I don't have any personal feeling towards mechanical objects but I am absolutely fascinated by the Comet Disaster... in particular that such a shameful engineering tragedy is somehow held by so many in some strangely perverse reverence as a technical achievement.
@@sandervanderkammen9230 Fryed Ryce Muncherz shud note-*_ How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% _DH Comet 1 22% or 27% or 31%_ _(2 or 1 or 0 of the DH Comet 1_ _losses were definite ground_ _handling error caused write-offs)._ Vickers VC10 UK 5% *_The DH Comet 1 aircraft specifically had better safety than or similar safety to many other commercial passenger aircraft_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 247 48% Boeing 707 20% Lockheed Electra 29% Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series. _The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._
@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. Cheers. _Toodle_ -PIP- *Old* *_Chap._*
. .... . ... . ... .. ... .... ... .... Ivcxivcxivcxcxiivxvivcxiccxxcc @@sandervanderkammen9230 Indeed its obviously the truth that Bow-wing (see b-47 wing folding incidents) is the result of a very commercially large, geographically large & very well protected domestic market, even so even in that situation economics & politics resulted in many US airliner manufacturers ceasing to exist obviously. Bow-wing aircraft should in fact currently be a lot safer than they actually are & airlines around the world don't have much choice these days anyway.
@@WilhelmKarsten@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. Cheers. _Toodle_ -PIP- *Old* *_Chap._*
A Comet 1 esből 9 + 2 prototipust gyártottak. A két prototipus 1949-ben repültek elöször. Lezuhantak 1953-1954 5 darab. A Comet 1 A - ból 10 darabot gyártottak lezuhant 1971-ig 3 darab. Szerintem a világ legszebb vonalu utaszálitó repülöje. A Comet órrát , szárnyát és pilotafülkéjét megvették a franciák és ebből lett a Caravelle ami 1958-ban repült elöször és 2006-ig 64 darab zuhant le.
Outstanding! This is an incredible piece of aviation history and it's wonderful that it is being restored. I'd love to see this plane when it is finished. There truly isn't another like it in the world.
Thank God there isn't... the Comet Disaster not only destroyed DeHavilland it was the worst engineering failure in the history of the entire commercial aviation. industry.
@@sandervanderkammen9230 Worse than DC10 cargo door? I don't think so - the DC10 issues were even known about before the Turkish Airlines crash. No-one knew about the issues around the Comet.
@@ukurko Yes, the DC-10 never had it's airworthiness certification permanently revoked. Not true, pilots repeatedly warned DeHaviland that the aircraft had serious problems right from the start of regular service... the first 2 Comets crashed with DeHaviland quickly denying any problems and tried to blame the crashes on pilot error. The Comet Disaster investigations found the aircraft riddled with hundreds of fatal design, material and construction defects, this resulted in a complete redesign of the entire aircraft from the wings, engines, fuselage hydraulic system even the toilets.
@@rayquirk4947 The Comet Disaster remains the worst engineering failure in commercial aviation history... even with 2 fatal accidents the Max still has a much better safety record in commercial aviation. In fact, the Boeing 737 series is not only the most successful jet airliner in history.... in per passenger/miles statistics its still one of the safest aircraft in history.
Well done.. This aircraft part of British history.. developed later to its full glory as the Comet 4. C4B and Comet 4c which flew for BOAC and later for Dan Air London based at Gatwick.
@@sandervanderkammen9230 Fryed Ryce Muncherz shud note-*_ How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% _DH Comet 1 22% or 27% or 31%_ _(2 or 1 or 0 of the DH Comet 1_ _losses were definite ground_ _handling error caused write-offs)._ Vickers VC10 UK 5% *_The DH Comet 1 aircraft specifically had better safety than or similar safety to many other commercial passenger aircraft_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 247 48% Boeing 707 20% Lockheed Electra 29% Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series. _The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._ DH worked to industry standards or much better than industry standards at the time. The had a lot of experience building all metal construction airframe aircraft before the Comet. The essential difference with the Comet being that before the Comet pressurised airliners had adequate strength for pressurisation just based on flying stresses as passenger cabin pressurisation was half that of the Comet. For the Comet the strength needed for passenger cabin pressurisation stress considerably exceeded that needed for flying load stress. All Comet 1s could of course be flown at lower altitude without pressurisation without issue.
@@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much. awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. There were very few flaws, most changes were previously planned & scheduled improvements regardless of issues discovered or were changes made as a result of just in case theorising. In fact the Comet had a very robust Airframe due to the combination of its particular size & 8psi pressurisation requirement resulting in the airframe being significantly stronger than required for flying stresses without pressurisation. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. Cheers. _Toodle_ -PIP- *Old* *_Chap._*
great to see the only surviving Comet 1 getting the care and attention it deserves, hope to see it for myself soon. In the meantime, do you use ACF50 protective spray on the exposed metal work during the winter months I wonder or is another method preferred?
Beautiful piece of history... best of luck with the restoration gents, interesting fact is that is was not the shape of the windows they found to be the problem but the way the rivets were used in fitting the windows that caused the issues.
The Comet Disaster was the result of an aircraft built with an appalling number of fatal design flaws and construction defects.. Even after the remaining Comet aircraft had their windows replaced the aircraft was deemed structurally unsafe to carry passengers and the aircraft type airworthiness certification was permanently revoked.
@@sandervanderkammen9230 *_ALL COMETS INCLUDING SOME COMET 1s HAD FULL CIVILIAN USE AIRWORTHINESS CERTIFICATION AFTER 1954_* Fryed Ryce Muncherz shud note-*_ How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% _DH Comet 1 22% or 27% or 31%_ _(2 or 1 or 0 of the DH Comet 1_ _losses were definite ground_ _handling error caused write-offs)._ Vickers VC10 UK 5% *_The DH Comet 1 aircraft specifically had better safety than or similar safety to many other commercial passenger aircraft_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 247 48% Boeing 707 20% Lockheed Electra 29% Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series. _The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._ DH worked to industry standards or much better than industry standards at the time. The had a lot of experience building all metal construction airframe aircraft before the Comet. The essential difference with the Comet being that before the Comet pressurised airliners had adequate strength for pressurisation just based on flying stresses as passenger cabin pressurisation was half that of the Comet. For the Comet the strength needed for passenger cabin pressurisation stress considerably exceeded that needed for flying load stress. All Comet 1s could of course be flown at lower altitude without pressurisation without issue.
@@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. There were very few flaws, most changes were previously planned & scheduled improvements regardless of issues discovered or were changes made as a result of just in case theorising. In fact the Comet had a very robust Airframe due to the combination of its particular size & 8psi pressurisation requirement resulting in the airframe being significantly stronger than required for flying stresses without pressurisation. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. Cheers. _Toodle_ -PIP- *Old* *_Chap._*
@@sandervanderkammen9230 All pressurised aircraft before the Comet had either heavy guage fabrication cockpit capsule design or were operating at much lower altitude with significantly lower pressurisation differential ratings. *_ALL COMETS INCLUDING SOME COMET 1s HAD FULL CIVILIAN USE AIRWORTHINESS CERTIFICATION AFTER 1954_* Fryed Ryce Muncherz shud note-*_ How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% _DH Comet 1 22% or 27% or 31%_ _(2 or 1 or 0 of the DH Comet 1_ _losses were definite ground_ _handling error caused write-offs)._ Vickers VC10 UK 5% *_The DH Comet 1 aircraft specifically had better safety than or similar safety to many other commercial passenger aircraft_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 247 48% Boeing 707 20% Lockheed Electra 29% Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series. _The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._ DH worked to industry standards or much better than industry standards at the time. The had a lot of experience building all metal construction airframe aircraft before the Comet. The essential difference with the Comet being that before the Comet pressurised airliners had adequate strength for pressurisation just based on flying stresses as passenger cabin pressurisation was half that of the Comet. For the Comet the strength needed for passenger cabin pressurisation stress considerably exceeded that needed for flying load stress. All Comet 1s could of course be flown at lower altitude without pressurisation without issue.
@@sandervanderkammen9230 @sandervanderkammen9230 The Comet had no effect of progression of the UK aerospace industry sector. Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. There were very few flaws, most changes were previously planned & scheduled improvements regardless of issues discovered or were changes made as a result of just in case theorising. In fact the Comet had a very robust Airframe due to the combination of its particular size & 8psi pressurisation requirement resulting in the airframe being significantly stronger than required for flying stresses without pressurisation. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. Cheers. _Toodle_ -PIP- *Old* *_Chap._*
Looking at air frames it’s amazing they don’t build them stronger. I know the key it to be light as possible but I’d rather pay more money for a ticket to be safe.
If manufacturer 'A' can do an airliner that will do passenger service etc with generally regarded as acceptable levels of safety then competitive economics dictates that if manufacturer B does an aircraft with the same safety but longer range & lower fuel use etc then manufacturer B gets the sales.
It's not a shameful part of British aviation but a sad one. What annoys me the most is that whenever the history of the Comet is viewed there are never any photographs of them in Air France or UAT livery or at any of the airports they flew into in Africa I think it's about time that someone wrote about this part of the Comets history. Surely Air France and UAT must have had a stackful of photos from the past.
It certainly was shameful... because the Comet Disaster could have been easily prevented if DeHavilland had followed common industry practice for the design and construction of pressurized cabins and engine placement. The question is did Air France ever really operate the Comet 1 in regular service before they all had airworthiness certification permanently revoked? Air France only purchased 3 Comet 1's in 1953 just months before the Comet Disaster grounded the fleet and they were all returned to DeHavilland where they were either scrapped or modified into military registered experimental aircraft. F-BGNZ was retired just 3 months after being accepted by Air France.. The aircraft had a total of just 300 hours when its registration was struck from service.
@@sandervanderkammen9230 Fryed Ryce Muncherz shud note-*_ How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% _DH Comet 1 22% or 27% or 31%_ _(2 or 1 or 0 of the DH Comet 1_ _losses were definite ground_ _handling error caused write-offs)._ Vickers VC10 UK 5% *_The DH Comet 1 aircraft specifically & Comets generally had better safety than, or similar safety to, many other commercial passenger aircraft_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 247 48% Boeing 707 20% Lockheed Electra 29% Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series. _The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._ DH worked to industry standards or much better than industry standards at the time. The had a lot of experience building all metal construction airframe aircraft before the Comet. The essential difference with the Comet being that before the Comet pressurised airliners had adequate strength for pressurisation just based on flying stresses as passenger cabin pressurisation was half that of the Comet. For the Comet the strength needed for passenger cabin pressurisation stress considerably exceeded that needed for flying load stress. All Comet 1s could of course be flown at lower altitude without pressurisation without issue.
@@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC*. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. There were very few flaws, most changes were previously planned & scheduled improvements regardless of issues discovered or were changes made as a result of just in case theorising. In fact the Comet had a very robust Airframe due to the combination of its particular size & 8psi pressurisation requirement resulting in the airframe being significantly stronger than required for flying stresses without pressurisation. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. Cheers. _Toodle_ -PIP- *Old* *_Chap._*
@@None-zc5vg Old boy i worked with said at age 8 he flew alone in a Comet 1 from Germany to South Africa. He said is dad was in the army, their home base was Germany but his dad had been sent to SA. He said it was a long journey stopping off in Nairobi. He went for the summer holiday.
DeHavilland was more than a decade behind in passenger aircraft design and construction.... the Comet Disaster only highlights the serious problems at what was a very deeply troubled company.
@@sandervanderkammen9230 very true, they had a history of structural failures. The square windows were not the real problem, it was the punched rivets (rather than drilled rivets) which would start fatigue cracks on the fuselage IN THE FACTORY. The story that the lessons learned from the Comet disasters helped to make the 707 and DC-8 safe was a lie, Boeing and Douglas were building pressurized aircraft for years, in Boeing's case they were building jet bombers as well without fuselage pressurization problems.
Michael it was never the fact that the windows were square that was the major problem At the time of manufacturing Redux bonding was used to help save weight and at that time problems of bonding around the windows was found and so permission was sought from the chief designer to use riveting instead..a desion he regretted the rest of his life. Secondly the metal was thin enough to be depressed using a finger, again to save weight all this led to the horror of breakup in flight .
@@sandervanderkammen9230 All pressurised aircraft before the Comet had either heavy guage fabrication cockpit capsule design or were operating at much lower altitude with significantly lower pressurisation differential ratings. *_ALL COMETS INCLUDING SOME COMET 1s HAD FULL CIVILIAN USE AIRWORTHINESS CERTIFICATION AFTER 1954_* Fryed Ryce Muncherz shud note-*_ How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% _DH Comet 1 22% or 27% or 31%_ _(2 or 1 or 0 of the DH Comet 1_ _losses were definite ground_ _handling error caused write-offs)._ Vickers VC10 UK 5% *_The DH Comet 1 aircraft specifically had better safety than or similar safety to many other commercial passenger aircraft_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 247 48% Boeing 707 20% Lockheed Electra 29% Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series. _The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._ DH worked to industry standards or much better than industry standards at the time. The had a lot of experience building all metal construction airframe aircraft before the Comet. The essential difference with the Comet being that before the Comet pressurised airliners had adequate strength for pressurisation just based on flying stresses as passenger cabin pressurisation was half that of the Comet. For the Comet the strength needed for passenger cabin pressurisation stress considerably exceeded that needed for flying load stress. All Comet 1s could of course be flown at lower altitude without pressurisation without issue.
I have always had great respect for the various foundations, museums, ect, who have donated their time and money to restore aircraft such as the Comet. I tip my hat to the volunteers who donate their time, which of course is the most valuable commodity
A Comet 1 with square windows, what an amazing piece of history.
Keep up the good work !!!!!!
The Comet Disaster was a horrible tragedy that could have been prevented, it remains the worst engineering failure in commercial aviation history.
Sander Van der Kammen, we get it, you don’t like it. You may stop now.
@@johnnunn8688 I don't have any personal feeling towards mechanical objects but I am absolutely fascinated by the Comet Disaster... in particular that such a shameful engineering tragedy is somehow held by so many in some strangely perverse reverence as a technical achievement.
@@sandervanderkammen9230
Fryed Ryce Muncherz shud note-*_
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
_DH Comet 1 22% or 27% or 31%_
_(2 or 1 or 0 of the DH Comet 1_
_losses were definite ground_
_handling error caused write-offs)._
Vickers VC10 UK 5%
*_The DH Comet 1 aircraft specifically had better safety than or similar safety to many other commercial passenger aircraft_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 247 48%
Boeing 707 20%
Lockheed Electra 29%
Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series.
_The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._
@sandervanderkammen9230
Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment.
*UPDATE MORE BREAKING NEWS ETC*
De Havilland (Of England) Comets were not grounded after 1970 due to structural problems.
*_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._*
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
Vickers VC10 UK 5%
*_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 307 70%
Boeing 247 48%
Boeing 707 20%
Lockheed L-049/149 Constellation 30%
Lockheed Electra Turboprop 29%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Sud Aviation Caravelle 15%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
A comparison of more recent aircraft.
Accident losses comparison examples.
1970s - 1980s
% of total Aircraft built
Similar aircraft type, date / decade, useage, size.
Biz Jets
BAe-125-800 1.7 %
Beechcraft Beechjet 400 2.2 %
Cessna 550 Citation II 7.1 %
Learjet 35 / 36 12 %
Beechcraft 1900 6%
Dassault Falcon 10 11.5%
Aérospatiale SN.601 22.5%
Medium size jets / Turboprops.
BAe-146 5.1%
Fokker 100 6%
McDonnell Douglas DC-9-30 9.5%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct.
All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights.
*The DH Comet - World Firsts.*
1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet.
The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked).
The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing.
1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS.
1st jet airliner to cross the Atlantic.
1st jet aircraft to do a world circumnavigation flights series.
*Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.*
*_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._*
The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet.
*_Other interesting World firsts_*
_World's first turboprop aircraft._
*Vickers Viscount Turboprop Airliner 1947.*
*A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.*
They might like to answer these questions.
*Which airline has just ordered*
*60 RR England Trent XWB Engines*
*& What aircraft are the engines for?*
_Bonus question for 10 points._
Which country has the
*World's Highest Combined Per Capita*
*Nuclear + Defence + Aerospace Sector Activity?*
👍 & 🙂 & of course 😎 indeed.
Cheers.
_Toodle_ -PIP- *Old* *_Chap._*
. .... . ... . ... .. ... .... ... ....
Ivcxivcxivcxcxiivxvivcxiccxxcc
@@sandervanderkammen9230
Indeed its obviously the truth that Bow-wing (see b-47 wing folding incidents) is the result of a very commercially large, geographically large & very well protected domestic market, even so even in that situation economics & politics resulted in many US airliner manufacturers ceasing to exist obviously. Bow-wing aircraft should in fact currently be a lot safer than they actually are & airlines around the world don't have much choice these days anyway.
I pray you guys finish restoring that infamous bird to its former glory!
Glory??? The Comet 1 was the worst engineering failure in commercial aviation history
@@WilhelmKarsten@sandervanderkammen9230
Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment.
*UPDATE MORE BREAKING NEWS ETC*
De Havilland (Of England) Comets were not grounded after 1970 due to structural problems.
*_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._*
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
Vickers VC10 UK 5%
*_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 307 70%
Boeing 247 48%
Boeing 707 20%
Lockheed L-049/149 Constellation 30%
Lockheed Electra Turboprop 29%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Sud Aviation Caravelle 15%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
A comparison of more recent aircraft.
Accident losses comparison examples.
1970s - 1980s
% of total Aircraft built
Similar aircraft type, date / decade, useage, size.
Biz Jets
BAe-125-800 1.7 %
Beechcraft Beechjet 400 2.2 %
Cessna 550 Citation II 7.1 %
Learjet 35 / 36 12 %
Beechcraft 1900 6%
Dassault Falcon 10 11.5%
Aérospatiale SN.601 22.5%
Medium size jets / Turboprops.
BAe-146 5.1%
Fokker 100 6%
McDonnell Douglas DC-9-30 9.5%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct.
All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights.
*The DH Comet - World Firsts.*
1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet.
The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked).
The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing.
1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS.
1st jet airliner to cross the Atlantic.
1st jet aircraft to do a world circumnavigation flights series.
*Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.*
*_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._*
The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet.
*_Other interesting World firsts_*
_World's first turboprop aircraft._
*Vickers Viscount Turboprop Airliner 1947.*
*A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.*
They might like to answer these questions.
*Which airline has just ordered*
*60 RR England Trent XWB Engines*
*& What aircraft are the engines for?*
_Bonus question for 10 points._
Which country has the
*World's Highest Combined Per Capita*
*Nuclear + Defence + Aerospace Sector Activity?*
👍 & 🙂 & of course 😎 indeed.
Cheers.
_Toodle_ -PIP- *Old* *_Chap._*
. .... . ... . ... .. .... ... ....
Ivcxivcxivcxcxivcxiccxxcc
A Comet 1 esből 9 + 2 prototipust gyártottak.
A két prototipus 1949-ben repültek elöször.
Lezuhantak 1953-1954 5 darab.
A Comet 1 A - ból 10 darabot gyártottak lezuhant 1971-ig 3 darab.
Szerintem a világ legszebb vonalu utaszálitó repülöje.
A Comet órrát , szárnyát és pilotafülkéjét megvették a franciák és ebből lett a Caravelle ami 1958-ban repült elöször és 2006-ig 64 darab zuhant le.
Outstanding! This is an incredible piece of aviation history and it's wonderful that it is being restored. I'd love to see this plane when it is finished.
There truly isn't another like it in the world.
Thank God there isn't... the Comet Disaster not only destroyed DeHavilland it was the worst engineering failure in the history of the entire commercial aviation. industry.
@@sandervanderkammen9230 Worse than DC10 cargo door? I don't think so - the DC10 issues were even known about before the Turkish Airlines crash. No-one knew about the issues around the Comet.
@@ukurko Yes, the DC-10 never had it's airworthiness certification permanently revoked.
Not true, pilots repeatedly warned DeHaviland that the aircraft had serious problems right from the start of regular service... the first 2 Comets crashed with DeHaviland quickly denying any problems and tried to blame the crashes on pilot error.
The Comet Disaster investigations found the aircraft riddled with hundreds of fatal design, material and construction defects, this resulted in a complete redesign of the entire aircraft from the wings, engines, fuselage hydraulic system even the toilets.
@@sandervanderkammen9230 I think the 737 Max holds that mantle now.
@@rayquirk4947 The Comet Disaster remains the worst engineering failure in commercial aviation history... even with 2 fatal accidents the Max still has a much better safety record in commercial aviation.
In fact, the Boeing 737 series is not only the most successful jet airliner in history.... in per passenger/miles statistics its still one of the safest aircraft in history.
Well done.. This aircraft part of British history.. developed later to its full glory as the Comet 4. C4B and Comet 4c which flew for BOAC and later for Dan Air London based at Gatwick.
The Comet Disaster is a very shameful chapter in British history...
@@sandervanderkammen9230
Fryed Ryce Muncherz shud note-*_
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
_DH Comet 1 22% or 27% or 31%_
_(2 or 1 or 0 of the DH Comet 1_
_losses were definite ground_
_handling error caused write-offs)._
Vickers VC10 UK 5%
*_The DH Comet 1 aircraft specifically had better safety than or similar safety to many other commercial passenger aircraft_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 247 48%
Boeing 707 20%
Lockheed Electra 29%
Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series.
_The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._
DH worked to industry standards or much better than industry standards at the time. The had a lot of experience building all metal construction airframe aircraft before the Comet. The essential difference with the Comet being that before the Comet pressurised airliners had adequate strength for pressurisation just based on flying stresses as passenger cabin pressurisation was half that of the Comet. For the Comet the strength needed for passenger cabin pressurisation stress considerably exceeded that needed for flying load stress. All Comet 1s could of course be flown at lower altitude without pressurisation without issue.
@@sandervanderkammen9230
Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much. awestruckness & extreme wonderment.
*UPDATE MORE BREAKING NEWS ETC*
De Havilland (Of England) Comets were not grounded after 1970 due to structural problems.
There were very few flaws, most changes were previously planned & scheduled improvements regardless of issues discovered or were changes made as a result of just in case theorising. In fact the Comet had a very robust Airframe due to the combination of its particular size & 8psi pressurisation requirement resulting in the airframe being significantly stronger than required for flying stresses without pressurisation.
*_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._*
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
Vickers VC10 UK 5%
*_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 307 70%
Boeing 247 48%
Boeing 707 20%
Lockheed L-049/149 Constellation 30%
Lockheed Electra Turboprop 29%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Sud Aviation Caravelle 15%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
A comparison of more recent aircraft.
Accident losses comparison examples.
1970s - 1980s
% of total Aircraft built
Similar aircraft type, date / decade, useage, size.
Biz Jets
BAe-125-800 1.7 %
Beechcraft Beechjet 400 2.2 %
Cessna 550 Citation II 7.1 %
Learjet 35 / 36 12 %
Beechcraft 1900 6%
Dassault Falcon 10 11.5%
Aérospatiale SN.601 22.5%
Medium size jets / Turboprops.
BAe-146 5.1%
Fokker 100 6%
McDonnell Douglas DC-9-30 9.5%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct.
All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights.
*The DH Comet - World Firsts.*
1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet.
The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked).
The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing.
1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS.
1st jet airliner to cross the Atlantic.
1st jet aircraft to do a world circumnavigation flights series.
*Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.*
*_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._*
The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet.
*_Other interesting World firsts_*
_World's first turboprop aircraft._
*Vickers Viscount Turboprop Airliner 1947.*
*A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.*
They might like to answer these questions.
*Which airline has just ordered*
*60 RR England Trent XWB Engines*
*& What aircraft are the engines for?*
_Bonus question for 10 points._
Which country has the
*World's Highest Combined Per Capita*
*Nuclear + Defence + Aerospace Sector Activity?*
👍 & 🙂 & of course 😎 indeed.
Cheers.
_Toodle_ -PIP- *Old* *_Chap._*
. .... . ... . ... .. .....
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That's fantastic
great to see the only surviving Comet 1 getting the care and attention it deserves, hope to see it for myself soon. In the meantime, do you use ACF50 protective spray on the exposed metal work during the winter months I wonder or is another method preferred?
Somebody made a mistake in the title, it is not a 1A, they had the round windows.
Beautiful piece of history... best of luck with the restoration gents, interesting fact is that is was not the shape of the windows they found to be the problem but the way the rivets were used in fitting the windows that caused the issues.
The Comet Disaster was the result of an aircraft built with an appalling number of fatal design flaws and construction defects..
Even after the remaining Comet aircraft had their windows replaced the aircraft was deemed structurally unsafe to carry passengers and the aircraft type airworthiness certification was permanently revoked.
@@sandervanderkammen9230
*_ALL COMETS INCLUDING SOME COMET 1s HAD FULL CIVILIAN USE AIRWORTHINESS CERTIFICATION AFTER 1954_*
Fryed Ryce Muncherz shud note-*_
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
_DH Comet 1 22% or 27% or 31%_
_(2 or 1 or 0 of the DH Comet 1_
_losses were definite ground_
_handling error caused write-offs)._
Vickers VC10 UK 5%
*_The DH Comet 1 aircraft specifically had better safety than or similar safety to many other commercial passenger aircraft_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 247 48%
Boeing 707 20%
Lockheed Electra 29%
Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series.
_The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._
DH worked to industry standards or much better than industry standards at the time. The had a lot of experience building all metal construction airframe aircraft before the Comet. The essential difference with the Comet being that before the Comet pressurised airliners had adequate strength for pressurisation just based on flying stresses as passenger cabin pressurisation was half that of the Comet. For the Comet the strength needed for passenger cabin pressurisation stress considerably exceeded that needed for flying load stress. All Comet 1s could of course be flown at lower altitude without pressurisation without issue.
@@sandervanderkammen9230
Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment.
*UPDATE MORE BREAKING NEWS ETC*
De Havilland (Of England) Comets were not grounded after 1970 due to structural problems.
There were very few flaws, most changes were previously planned & scheduled improvements regardless of issues discovered or were changes made as a result of just in case theorising. In fact the Comet had a very robust Airframe due to the combination of its particular size & 8psi pressurisation requirement resulting in the airframe being significantly stronger than required for flying stresses without pressurisation.
*_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._*
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
Vickers VC10 UK 5%
*_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 307 70%
Boeing 247 48%
Boeing 707 20%
Lockheed L-049/149 Constellation 30%
Lockheed Electra Turboprop 29%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Sud Aviation Caravelle 15%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
A comparison of more recent aircraft.
Accident losses comparison examples.
1970s - 1980s
% of total Aircraft built
Similar aircraft type, date / decade, useage, size.
Biz Jets
BAe-125-800 1.7 %
Beechcraft Beechjet 400 2.2 %
Cessna 550 Citation II 7.1 %
Learjet 35 / 36 12 %
Beechcraft 1900 6%
Dassault Falcon 10 11.5%
Aérospatiale SN.601 22.5%
Medium size jets / Turboprops.
BAe-146 5.1%
Fokker 100 6%
McDonnell Douglas DC-9-30 9.5%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct.
All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights.
*The DH Comet - World Firsts.*
1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet.
The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked).
The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing.
1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS.
1st jet airliner to cross the Atlantic.
1st jet aircraft to do a world circumnavigation flights series.
*Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.*
*_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._*
The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet.
*_Other interesting World firsts_*
_World's first turboprop aircraft._
*Vickers Viscount Turboprop Airliner 1947.*
*A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.*
They might like to answer these questions.
*Which airline has just ordered*
*60 RR England Trent XWB Engines*
*& What aircraft are the engines for?*
_Bonus question for 10 points._
Which country has the
*World's Highest Combined Per Capita*
*Nuclear + Defence + Aerospace Sector Activity?*
👍 & 🙂 & of course 😎 indeed.
Cheers.
_Toodle_ -PIP- *Old* *_Chap._*
. .... . ... . ... .. .....
... .... ... ...........
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My favorite british airliner aircraft ..
The worst engineering failure in aviation history... the Comet Disaster destroyed DeHavilland
@@sandervanderkammen9230
All pressurised aircraft before the Comet had either heavy guage fabrication cockpit capsule design or were operating at much lower altitude with significantly lower pressurisation differential ratings.
*_ALL COMETS INCLUDING SOME COMET 1s HAD FULL CIVILIAN USE AIRWORTHINESS CERTIFICATION AFTER 1954_*
Fryed Ryce Muncherz shud note-*_
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
_DH Comet 1 22% or 27% or 31%_
_(2 or 1 or 0 of the DH Comet 1_
_losses were definite ground_
_handling error caused write-offs)._
Vickers VC10 UK 5%
*_The DH Comet 1 aircraft specifically had better safety than or similar safety to many other commercial passenger aircraft_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 247 48%
Boeing 707 20%
Lockheed Electra 29%
Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series.
_The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._
DH worked to industry standards or much better than industry standards at the time. The had a lot of experience building all metal construction airframe aircraft before the Comet. The essential difference with the Comet being that before the Comet pressurised airliners had adequate strength for pressurisation just based on flying stresses as passenger cabin pressurisation was half that of the Comet. For the Comet the strength needed for passenger cabin pressurisation stress considerably exceeded that needed for flying load stress. All Comet 1s could of course be flown at lower altitude without pressurisation without issue.
@@sandervanderkammen9230
@sandervanderkammen9230
The Comet had no effect of progression of the UK aerospace industry sector.
Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment.
*UPDATE MORE BREAKING NEWS ETC*
De Havilland (Of England) Comets were not grounded after 1970 due to structural problems.
There were very few flaws, most changes were previously planned & scheduled improvements regardless of issues discovered or were changes made as a result of just in case theorising. In fact the Comet had a very robust Airframe due to the combination of its particular size & 8psi pressurisation requirement resulting in the airframe being significantly stronger than required for flying stresses without pressurisation.
*_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._*
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
Vickers VC10 UK 5%
*_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 307 70%
Boeing 247 48%
Boeing 707 20%
Lockheed L-049/149 Constellation 30%
Lockheed Electra Turboprop 29%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Sud Aviation Caravelle 15%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
A comparison of more recent aircraft.
Accident losses comparison examples.
1970s - 1980s
% of total Aircraft built
Similar aircraft type, date / decade, useage, size.
Biz Jets
BAe-125-800 1.7 %
Beechcraft Beechjet 400 2.2 %
Cessna 550 Citation II 7.1 %
Learjet 35 / 36 12 %
Beechcraft 1900 6%
Dassault Falcon 10 11.5%
Aérospatiale SN.601 22.5%
Medium size jets / Turboprops.
BAe-146 5.1%
Fokker 100 6%
McDonnell Douglas DC-9-30 9.5%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct.
All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights.
*The DH Comet - World Firsts.*
1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet.
The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked).
The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing.
1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS.
1st jet airliner to cross the Atlantic.
1st jet aircraft to do a world circumnavigation flights series.
*Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.*
*_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._*
The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet.
*_Other interesting World firsts_*
_World's first turboprop aircraft._
*Vickers Viscount Turboprop Airliner 1947.*
*A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.*
They might like to answer these questions.
*Which airline has just ordered*
*60 RR England Trent XWB Engines*
*& What aircraft are the engines for?*
_Bonus question for 10 points._
Which country has the
*World's Highest Combined Per Capita*
*Nuclear + Defence + Aerospace Sector Activity?*
👍 & 🙂 & of course 😎 indeed.
Cheers.
_Toodle_ -PIP- *Old* *_Chap._*
. .... . ... . ... .. .....
... .... ... ...........
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Looking at air frames it’s amazing they don’t build them stronger. I know the key it to be light as possible but I’d rather pay more money for a ticket to be safe.
If manufacturer 'A' can do an airliner that will do passenger service etc with generally regarded as acceptable levels of safety then competitive economics dictates that if manufacturer B does an aircraft with the same safety but longer range & lower fuel use etc then manufacturer B gets the sales.
It's not a shameful part of British aviation but a sad one.
What annoys me the most is that whenever the history of the Comet is viewed there are never any photographs of them in Air France or UAT livery or at any of the airports they flew into in Africa
I think it's about time that someone wrote about this part of the Comets history.
Surely Air France and UAT must have had a stackful of photos from the past.
It certainly was shameful... because the Comet Disaster could have been easily prevented if DeHavilland had followed common industry practice for the design and construction of pressurized cabins and engine placement.
The question is did Air France ever really operate the Comet 1 in regular service before they all had airworthiness certification permanently revoked?
Air France only purchased 3 Comet 1's in 1953 just months before the Comet Disaster grounded the fleet and they were all returned to DeHavilland where they were either scrapped or modified into military registered experimental aircraft.
F-BGNZ was retired just 3 months after being accepted by Air France..
The aircraft had a total of just 300 hours when its registration was struck from service.
@@sandervanderkammen9230
Fryed Ryce Muncherz shud note-*_
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
_DH Comet 1 22% or 27% or 31%_
_(2 or 1 or 0 of the DH Comet 1_
_losses were definite ground_
_handling error caused write-offs)._
Vickers VC10 UK 5%
*_The DH Comet 1 aircraft specifically & Comets generally had better safety than, or similar safety to, many other commercial passenger aircraft_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 247 48%
Boeing 707 20%
Lockheed Electra 29%
Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series.
_The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._
DH worked to industry standards or much better than industry standards at the time. The had a lot of experience building all metal construction airframe aircraft before the Comet. The essential difference with the Comet being that before the Comet pressurised airliners had adequate strength for pressurisation just based on flying stresses as passenger cabin pressurisation was half that of the Comet. For the Comet the strength needed for passenger cabin pressurisation stress considerably exceeded that needed for flying load stress. All Comet 1s could of course be flown at lower altitude without pressurisation without issue.
@@sandervanderkammen9230
Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment.
*UPDATE MORE BREAKING NEWS ETC*.
De Havilland (Of England) Comets were not grounded after 1970 due to structural problems.
There were very few flaws, most changes were previously planned & scheduled improvements regardless of issues discovered or were changes made as a result of just in case theorising. In fact the Comet had a very robust Airframe due to the combination of its particular size & 8psi pressurisation requirement resulting in the airframe being significantly stronger than required for flying stresses without pressurisation.
*_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._*
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
Vickers VC10 UK 5%
*_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 307 70%
Boeing 247 48%
Boeing 707 20%
Lockheed L-049/149 Constellation 30%
Lockheed Electra Turboprop 29%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Sud Aviation Caravelle 15%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
A comparison of more recent aircraft.
Accident losses comparison examples.
1970s - 1980s
% of total Aircraft built
Similar aircraft type, date / decade, useage, size.
Biz Jets
BAe-125-800 1.7 %
Beechcraft Beechjet 400 2.2 %
Cessna 550 Citation II 7.1 %
Learjet 35 / 36 12 %
Beechcraft 1900 6%
Dassault Falcon 10 11.5%
Aérospatiale SN.601 22.5%
Medium size jets / Turboprops.
BAe-146 5.1%
Fokker 100 6%
McDonnell Douglas DC-9-30 9.5%
Fairchild FH-227 30%
McDonnell Douglas DC-8 14%
Canadair CL-44 Turboprop 46%
Convair CV-580 Turboprop 22%
Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct.
All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights.
*The DH Comet - World Firsts.*
1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet.
The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked).
The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing.
1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS.
1st jet airliner to cross the Atlantic.
1st jet aircraft to do a world circumnavigation flights series.
*Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.*
*_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._*
The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet.
*_Other interesting World firsts_*
_World's first turboprop aircraft._
*Vickers Viscount Turboprop Airliner 1947.*
*A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.*
They might like to answer these questions.
*Which airline has just ordered*
*60 RR England Trent XWB Engines*
*& What aircraft are the engines for?*
_Bonus question for 10 points._
Which country has the
*World's Highest Combined Per Capita*
*Nuclear + Defence + Aerospace Sector Activity?*
👍 & 🙂 & of course 😎 indeed.
Cheers.
_Toodle_ -PIP- *Old* *_Chap._*
. .... . ... . ... .. .....
... .... ... ...........
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iivxvivcxiccxxccvcvv
I didn’t know the comet was that small in 1952
It was massive for it's day, but scales change over time.
@@garywalker447 Only the wealthy few could have 'paid the freight' for long-distance air-travel in those days.
@@None-zc5vg This is me not arguing that point.
@@None-zc5vg Old boy i worked with said at age 8 he flew alone in a Comet 1 from Germany to South Africa. He said is dad was in the army, their home base was Germany but his dad had been sent to SA. He said it was a long journey stopping off in Nairobi. He went for the summer holiday.
It was smaller than a DC-6.
Beautiful aircraft somewhat ahead-of-its-time if it wasn't for the square Windows I think it would have been a real winner
DeHavilland was more than a decade behind in passenger aircraft design and construction.... the Comet Disaster only highlights the serious problems at what was a very deeply troubled company.
@@sandervanderkammen9230 very true, they had a history of structural failures. The square windows were not the real problem, it was the punched rivets (rather than drilled rivets) which would start fatigue cracks on the fuselage IN THE FACTORY. The story that the lessons learned from the Comet disasters helped to make the 707 and DC-8 safe was a lie, Boeing and Douglas were building pressurized aircraft for years, in Boeing's case they were building jet bombers as well without fuselage pressurization problems.
Michael it was never the fact that the windows were square that was the major problem
At the time of manufacturing Redux bonding was used to help save weight and at that time problems of bonding around the windows was found and so permission was sought from the chief designer to use riveting instead..a desion he regretted the rest of his life.
Secondly the metal was thin enough to be depressed using a finger, again to save weight all this led to the horror of breakup in flight .
The windows weren't really square, they had rounded corners like most Boeing windows.
@@sandervanderkammen9230
All pressurised aircraft before the Comet had either heavy guage fabrication cockpit capsule design or were operating at much lower altitude with significantly lower pressurisation differential ratings.
*_ALL COMETS INCLUDING SOME COMET 1s HAD FULL CIVILIAN USE AIRWORTHINESS CERTIFICATION AFTER 1954_*
Fryed Ryce Muncherz shud note-*_
How things were back then -
*_Accident losses - % of aircraft built._*
DeHavilland Comet 4 UK 14%
DeHavilland Comet all mks 17%
_DH Comet 1 22% or 27% or 31%_
_(2 or 1 or 0 of the DH Comet 1_
_losses were definite ground_
_handling error caused write-offs)._
Vickers VC10 UK 5%
*_The DH Comet 1 aircraft specifically had better safety than or similar safety to many other commercial passenger aircraft_*
Douglas DC-1 99%
Douglas DC-2 47%
Douglas DC-3 30%
Douglas DC-4 26%
Boeing s300 72%
Boeing 247 48%
Boeing 707 20%
Lockheed Electra 29%
Of course the Comet was the *TEMPLATE DESIGN for all modern jet airliners* & was the first in the world jet powered all metal construction pressurised passenger cabin high altitude airliner, *_the first in the world jet airliner to cross the Atlantic_* & the first in the world jet airliner to carry out a full global circumnavigation flights series.
_The proposed Comet 5_ was indeed the basic template design handed to -Boeing for their subsequent 707 design,- _all Boeing had to do to get the Comet 5 cancelled & gain access to huge amounts of info & UK orders for the 707 was to agree to use RR engines in some of them._
DH worked to industry standards or much better than industry standards at the time. The had a lot of experience building all metal construction airframe aircraft before the Comet. The essential difference with the Comet being that before the Comet pressurised airliners had adequate strength for pressurisation just based on flying stresses as passenger cabin pressurisation was half that of the Comet. For the Comet the strength needed for passenger cabin pressurisation stress considerably exceeded that needed for flying load stress. All Comet 1s could of course be flown at lower altitude without pressurisation without issue.
How are things currently?
I visited in the Autumn of 2019 and the hanger had been built but was empty ...
I never knew Air France bought the comet.