De Havilland Comet: Short documentary
HTML-код
- Опубликовано: 25 июл 2023
- From triumph to tragedy and back again, the groundbreaking de Havilland Comet epitomized the audacity of innovation and resilience of the human spirit, forever transforming aviation along the way.
#deHavillandComet, #TheComet, #Dh106Comet, #WorldsFirstJetliner, #JetAge, #AviationHistory, #AerospaceEngineering, #AircraftDesign, #TurbojetEngine, #PressurizedCabin, #HighAltitudeFlight, #SmoothRide, #PassengerComfort, #SleekDesign, #Aerodynamics, #AviationPioneer, #CommercialAviation, #LongDistanceTravel, #FasterTravel, #FutureOfTravel, #AirlineTravel, #BritishInnovation, #UKEngineering, #PostWarProgress, #NewHorizons, #BlueSkyInnovation, #TechnologicalMarvel, #DesignMasterpiece, #EngineeringExcellence, #MaterialsScience, #MetalFatigue, #InvestigativeRigor, #LessonsLearned, #AircraftSafety, #FlightCertification, #AviationAuthorities, #AirworthinessStandards, #DesignPhilosophies, #DamageTolerance, #FailSafe, #SafeLife, #Comeback, #Resilience, #AudacityToContinue, #NeverGiveUp, #LearnAndImprove, #SetbacksAndComebacks, #TragedyToTriumph, #HumanIngenuity, #InnovationJourney, #EngineeringOdyssey, #TrustInScience, #FaithInProgress, #PushingBoundaries, #DaringToDream, #ReachForTheSkies, #UpwardsAndOnwards, #BlueSkyThinking, #EyesOnTheHorizon
#deHavilland, #DH106, #Comet1, #Comet4, #ghostengines, #turbojet, #jetengine, #sweptwings, #metalfatigue, #squarewindows, #pressurizedcabin, #structuralfailure, #midairbreakup, #aircraftinvestigation, #stresstests, #materialanalysis, #microfractures, #farnborough, #royalaircraft, #understandingscience, #aircraftforensics, #accidentreconstruction, #ndt, #metallurgy, #britishaviation, #aviationdesign, #aerodynamics, #windtunneltesting, #compositematerials, #aluminium, #rivetedconstruction, #monocoque, #dhvampire, #dehavillandmosquito, #pistonera, #propellerdriven, #subsonicflight, #transonic, #supersonic, #boomspeed, #questforspeed, #soundbarrier, #chuckyeager, #fasterthanSound, #peakofaviation, #historyofFlight, #flightscience, #aerospacematerials, #structuraltesting, #drivenrivet, #metalbonding, #glue, #structuraladhesive, #inheritedknowledge
#innovation, #engineering, #design, #science, #technology, #humanprogress, #advancement, #modernization, #betterlives, #socialbenefit, #techforgood, #aerospace, #aviation, #aircraft, #jetplane, #jetengine, #turbofan, #turboprop, #pistonprop, #propeller, #wingdesign, #controlsurfaces, #empennage, #fuselage, #planform, #liftingbody, #flightdynamics, #flighttesting, #windtunnel, #computationalfluiddynamics, #simulator, #flybywire, #avionics, #navigation, #aerodynamics, #structure, #materials, #alloys, #composites, #sheetmetal, #assemblies, #monocoque, #bulkheads, #stringers, #fasteners, #systemssafety, #humanfactors, #pilotworkload, #cockpitdesign, #crewresourcemanagement, #checklist, #standardcallouts, #CRM, #maintainability, #inspections, #damagecontrol, #failsafephilosophy, #dualduplicateTriplicateRedundancy, #reliability, #qualitycontrol, #variation, #measurement, #statisticalprocesscontrol, #continuousimprovement, #learnevolveimprove, #troubleshooting, #rootcauseanalysis, #FirstJetDisaster, #MetalFatigueMystery, #SquareWindowsWeakness, #StressConcentration, #InvestigationIntrigue, #GroundbreakingResearch, #AircraftTeardown, #MicrofractureAnalysis, #CatastrophicDecompression, #ExplosiveDepressurization, #InflightBreakup, #PlummetingFromTheSky, #DeepSeamystery, #BlackBoxrecovery, #WreckageReconstruction, #CrashAnalysis, #FailureTheories, #MetallurgyLessons, #DesignFlaws, #DeadlyUnforeseenRisk, #AccidentReconstruction, #SimulatedStressTesting, #RepeatedPressurization, #UnderstandingMetalFatigue, #MicroscopicCracks, #CrackPropagation, #BrittleBeforeDuctile, #RivetHoles, #WindowCorners, #StressRisers, #FailureChain, #CrisisOfConfidence, #CometCalamity, #TheFatalDesign, #KillerSquareWindows, #TheCometsCurse, #AirSafetyRevolution, #CostlyLessonsLearned, #TurningTragedyToKnowledge, #NeverAgainMindset, #SafetyBeforeSchedule, #FixTheDesignFlaw, #AircraftForensics, #CrashInvestigators, #Mysterysolved, #Caseclosed, #EndOfAnEra, #Torchpassed, #RiseAndFall, #PhoenixFromTheAshes,
#NewCometTakesFlight, #Comet4, #SaferSkies, #TragedyToTriumph, #ResilienceAndRecovery, #BackInBusiness, #RisingAgain, #HardLessonsLearned, #NeverSayDie, #TrueGrit, #FortitudeAndResolve, #AudacityToContinue, #PressonRegardless, #StaytheCourse, #WhenTheGoingGetsTough, #NeverGiveUp, #AgeOfTheComet, #TheCometLivesOn, #RoundedWindowSuccess, #NoMoreSquareWindows, #ReducedStress, #BolsteredFrames, #FatigueAnalysis, #DamageTolerance, #SafeLifeDesign, #CometRisesAgain, #ReturnToFlight, #RestoredTrust,
#iconicplanes, #legendaryaircraft, #planenerds, #aviationgeeks, #aviationlovers, #wingnuts, #aerospacehistory, #cometfans, #DH106lovers, #britishaviationfans, #oldbirds, #vintageaircraft, #retrojets,
the Lockheed Constellation and the Comet to me are the pinnacle of beautiful aircraft. They rise above all the rest. The Comet suffered from several tragedies, but rose up again as beautiful dove,ready to fly again. This is a great video!
I agree, and will only add that the Vickers VC10 rather took my breath away, a real piece of aeronautical sculpture.
The Comet Disaster is the worst engineering failure in commercial aviation history, it destroyed de Haviland and a major Milestone in the demise of the entire UK aircraft industry
@@patpongmichikoThe VC-10 was another disappointing failure
More specifically, a commercial failure. An engineering marvel however, a superb aircraft, albeit tailored too specifically to the needs of B.O.A.C. @@WilhelmKarsten
@@patpongmichiko In the aviation industry there is no worse a failure than a commercial one... and that is why Vickers no longer exists and there are no longer any British companies making British jet aircraft.
The Royal Airforce also flew these things and, at 9 years old, I flew with the family to Bahrain, where my father had been posted. We refueled in Cyprus (to where we were also posted years later). After 2 years on a desert island, we flew back on a Vickers VC10, also an icon. While visiting Gatwick several years back, I discovered the cutaway exhibit of a comet on the visitors' viewing platform. I couldn't believe how narrow the thing was compared to modern airliners. Of course, I knew nothing of its chequered history - good job too!
I am really enjoying your wonderful channel. Thank you for all your efforts.
If you want to learn everything about repetition then this video is a must. Strip it out and you have a video just a over a minute long
Agree, all produced using AI, including the narrator's voice.
I just discovered your channel a few days earlier, and I love it! High quality documentaries.
Glad you like them!
Thank you! Another super video. Loving your channel.
Glad you enjoy it!
Good videos. Great archival footage. Keep them coming.
All a learning curve and all others improved on this progression😊
Unfortunately the Comet Disaster was a tragedy that could have been easily prevented if de Haviland had simply followed well-known and understood industry standards
@@WilhelmKarsten espionage probably played a part. De Havilland's order books were full of customers other manufacturers wanted.
You think there weren't those at the development and manufacturing stage of the Comet's time line that warned against punch riveting?
It's business that prevails my friend and money talks.
@@antman5474What espionage? It obvious no one ever tried to copy the Comet.
Not as many as Boeing had for the 707... everyone has copied the 707.
The Comet Disaster is the worst engineering failure in commercial jet aviation history, the direct result of lack of experience, lack of development and testing, shortcuts, incompetence and criminal negligence.
The Comet is a truly shameful and humiliating chapter in British history, the fact they tried to cover it up is reprehensible.
@@WilhelmKarsten the Comet was meant to be glued together. It was cutting edge.
Rivets were added later on.
It was the rivets that failed. They weren't part of the late 40's design brief.
Didn't Boeing do well.
@@antman5474 a your commet reveals someone who knows very little about the Comet Disaster...
The Comet was designed to have a conventional riveted aluminum airframe, not the molded plywood and fabric construction methods that de Havilland was famous for.
The Comet was grounded after 6 unexplained hull loss accidents and its airworthiness certification was permanently revoked.
Investigations found that the de Havilland used aluminum skins that were too thin (just 1mm thick) and the wrong alloy (AL2014B is too brittle)
The Comet lacked basic structural reinforcements like Rip-stop doubler joints and the fuselage frame hoops were too narrow and spaced to far apart to prevent cracks from joining up with adjacent panels.
Yes, the riveted fasteners were bad too but nor the actual cause of the catastrophic in-flight structural failures, the fuselage was simply too weak to prevent a crack from ripping the aircraft apart.
Any questions?
Excellent video.
Thank you very much!
It is hard to state the effect that the Comet had on other aircraft manufacturers. There were a couple of shots of John "Cat's Eyes" Cunningham, DeHavilland's chief test pilot. He was the first to fly the Comet. Before the plane was introduced to the public, Cunningham took Lockheed's chief test pilot for a ride. The guy from Lockheed was totally blown away. At that time the Lockheed Constellation was the state of the art Queen of the Sky. No doubt Boeing and Douglas soon got the news, too. Such a shame that DeHavilland and England were not long in the sun before tragedies occurred. But the Comet remains the first jet airliner and a thing of timeless beauty.
Cunningham was one of several pilots that said the Comet was not ready for service and the the plane required major remedial engineering work before it would be safe for revenue service, the Comet had fatal flaws that made the aircraft extremely difficult to safely get airborne during take-off.
A lack of engine thrust and lift during rotation and flight controls that lacked feedback.
This resulted in dozens of near runway excursions and 3 hull loss accidents.
In hindsight we know that Comet 1 was a failed attempt, the first successful airworthy jet airliner is the Boeing 707 family
@@WilhelmKarsten Excellent points. I didn't know about Cunningham's criticisms. Wow. That would have prevented some deaths if DeHavillands had listened. I noted there was no comment from Cunningham regarding the thin skin that led to the explosive decompression. Of course, that could have been discovered only when Sir Arnold Hall did the post-mortem on the recovered wreckage.
@@tombrown1898 de Havilland blamed the runway excursions on the pilots but later amended the density altitude tables for max take-off weight and minimum runway length... it never issued any apologies to the pilots.
Comet 1 would be grounded again in 1954 and its airworthiness certification was permanently revoked.
The Comet 4 was a completely redesigned aircraft with major improvements in wings, bigger flaps, more powerful engines and more importantly redesigned engine inlets that were responsible for the surging and loss of lift during rotation, the Comet 4 would get a completely redesigned flight control system with elevator feedback on the control yoke.
*_Fryed Ryce Muncherz (Kharzeestan Krapper DikterBummer &co etc ) shud note deferentially with great respect for their infinitely superior superiors & should be aware, their fraud claims about Mr Cunningham are BS, he said no such things._*
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 & the Comet 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%
The DH Comet - World Firsts.
1st gas turbine jet powered airliner. 1st high altitude pressurised passenger cabin airliner.
1st all hydraulically powered flying surface controls airliner.
1st jet airliner aircraft to cross the Atlantic.
1st jet aircraft to do a world circumnavigation flights series.
*Of course De Havilland had experience building many all metal construction airframe aircraft including some of the worlds first successful reliable usable pressurised cockpit mostly metal airframe jet fighters with DH built jet engines that were in service in large numbers ahead of the US & we know Handley Page built the world's first all metal construction Airframe airliner which was built in England in the 1920s.*
*_De Havilland did indeed always work to better than industry standards at the time, no evidence of negligence ever being evidenced in relation to the DH Comet._*
_Pilots actually universally liked the controls & many incidents were due to pilot error flying an unfamiliar type. There was never a lack of lift on rotation, in fact if anything it was too easy to quickly get the nose too high in the air resulting in a takeoff run stall._
_It goes without saying that for example the DH design team design - the BAE-146 was bought by British operators & that aircraft went into service a considerable time after the DH Comet, the world's first jet airliner, went into regular service._
As I’m old I know and have flown with people who flew the Comet 4 and the RAF Nimrod maritime patrol aircraft, every one I know who flew it said it was a remarkable aircraft, just a shame it start off like fabulous aircraft it became.
Comet 1 was a horrible aircraft, so fatally flawed that it's airworthiness certification was permanently revoked.
The Comet 4 has the highest loss rate and fatalities statistics of any jet airliner in history except for the Comet 1.
The Nimrod is not a Comet, although they look somewhat similar thier are different aircraft
@@WilhelmKarsten
@Williamstown
Wrong. Qwerty
DH had built many all metal construction airframe aircraft before the Comet.
Comet world firsts -
The DH Comet was the world's first jet airliner.
First airliner with all power hydraulic flight controls / actuation.
First high altitude large pressurised passenger cabin fuselage airliner.
First jet airliner Atlantic crossing.
Worlds first jet airliner global circumnavigation flights series.
Example of accident aircraft losses -
All comet Mks accident airframe losses - 17%
Boeing 707 20%
Lockheed Electra Turboprop - 29%
(The Electra 1st flew 10 years later
than the DH Comet).
Ytrewq
@@WilhelmKarsten
The Comet did not have permanently revoked certification.
All mks of Comet had full civilian use certification after 1954.
Another well narrated video.
Glad you enjoyed it
@@dontdeletehistoryIsn't the narration AI-generated, or at least heavily enhanded? Very different accent from your very early videos. The text also sounds like it was put together with AI. Too many big words and terms like "shimmering promise".
@@viscount757 it’s my voice clone with eleven labs
Dude... I love your channel. Thank you for breaking the aviation super-fan clubhouse out of the realm of the old white guys. Def sub here.
Welcome aboard!
It's worth noting that G-ALYP, "Yoke Peter," was the first Comet to enter service with BOAC and was also the plane that broke up near Elba. G-ALYY, "Yoke Yoke," was the second to experience explosive decompression. The square windows didn't help, but it was actually the riveting method that caused the stress fractures. They used G-ALYU, "Yoke Uncle," in the water tank to determine the causes of the breakups.
de Havilland also used aluminum skins that were too thin and made from an alloy that was too brittle.
The Comet didn't have proper Rip-stop doubler joints
The fuselage frame hoops were too narrow and spaced too far apart to prevent cracks from joining up with adjacent panels.
de Havilland lacked the technology and experience in building aircraft from riveted aluminum, they were still building aircraft primarily from wood and fabric when the Comet was designed.
@@WilhelmKarsten
Wrong. 56789
DH had built many all metal construction airframe aircraft before the Comet.
Comet world firsts -
The DH Comet was the world's first jet airliner.
First airliner with all power hydraulic flight controls / actuation.
First high altitude large 8psi pressurised full fuselage length passenger cabin airliner.
(Nobody had done that before the Comet & nobody had done anything similar or equivalent.)
First jet airliner Atlantic crossing.
Worlds first jet airliner global circumnavigation flights series.
Example of accident aircraft losses -
All comet Mks accident airframe losses - 17%
Boeing 707 20%
Lockheed Electra Turboprop - 29%
(The Electra 1st flew 10 years later
than the DH Comet).
54321
Your narration of these videos is outstanding. The Comet remains the most beautiful airliner ever built.
Glad you like them!
The Comet also remains the deadliest airliner ever built, flying became much safer after the demise of de Haviland
@@WilhelmKarsten
£&+£#@
Wrong.
DH had built many all metal construction airframe aircraft before the Comet.
Comet world firsts -
*The DH Comet was the world's first jet airliner.*
First airliner with all power hydraulic flight controls / actuation.
First high altitude large pressurised passenger cabin fuselage airliner.
First jet airliner Atlantic crossing.
Worlds first jet airliner global circumnavigation flights series.
Example of accident aircraft losses -
All comet Mks accident airframe losses - 17%
Boeing 707 20%
Lockheed Electra Turboprop - 29%
(The Electra 1st flew 10 years later
than the DH Comet).
I was a passenger on Comet 4B G-APDS (BOAC). I was also told that I also was a passenger as a baby on the 2nd ever Comet flight from Singapore to London. The accidents and grounding would occur later. On the Comet 4B, the pressurisation was less sophisticated than nowadays, so descent could be painful on the ears. Most passengers would take an offered sweet or chewing gum.
Bro, you're a part of history. Respect. I'm now going to look into which airframe that was used on its second flight.
You are very lucky to be alive, the Comet was the deadliest airliner in history
@@WilhelmKarsten you could say the same thing about the Electra or the 727 or the DC10.
Once the initial problems were rectified they all good to go.
@@antman5474 Comet 1 was grounded in 1954 and it's airworthiness certification was permanently revoked in 1958.
@@antman5474 The Comet has the highest loss rate and fatalities statistics of any jet airliner in history..
How ironic that metal fatigue might have played a role in the Titanic's demise as with the Comet 1. .Your narrative is superb!
Poor quality riveting was also a factor in both of these infamous engineering disasters.
@@WilhelmKarsten
*Kharzeestan Krapper DikterBummer & co etc shud note deferentially and with great respect for their infinitely superior superiors*
The Titanic incident of course had nothing to do with riveting quality.
@@petemaly8950 de Havilland used riveting techniques that were completely unsuitable for pressurized cabins.
@@petemaly8950 Please name a British aircraft manufacturer that still makes British jets????
@@WilhelmKarsten
@WilhelmKarsten
Wrong.
DH had built many all metal construction airframe aircraft before the Comet.
Comet world firsts -
The DH Comet was the world's first jet airliner.
First airliner with all power hydraulic flight controls / actuation.
First high altitude large pressurised passenger cabin fuselage airliner.
First jet airliner Atlantic crossing.
Worlds first jet airliner global circumnavigation flights series.
Example of accident aircraft losses -
All comet Mks accident airframe losses - 17%
Boeing 707 20%
Lockheed Electra Turboprop - 29%
(The Electra 1st flew 10 years later
than the DH Comet).
❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤
There is no doubt the Comet was a marvel set back by the not full under standing of fatigue . I want to add another great aircraft development , the development of the Hawker Hurricane from a Biplane so it managed to win the Battle of Britain despite the Spitfire greatness. The Hurricane was the greatest weapon.
Note the window problem on the Comet was not the problem it was the not full understanding of fatigue that was the problem
Metal fatigue was well-known and understood by the aviation industry at the time, unfortunately de Havilland had little experience with riveted aluminum airframe design or construction, they were building aircraft primarily from wood and fabric well into the 1950s.
On slow piston planes not jets, that is a completely different ball game as with jets fatigue sets a lot faster than on a propliner
@@WilhelmKarsten
Wrong.
DH had a lot of experience producing all metal Airframe aircraft before the Comet.
Rivets bro. The initial design didn't call for them. But they were added.
Industrial espionage has done the rounds. And please don't ask for source, it's been known for a long time.
Rivets indeed, de Havilands success was limited to building aircraft from molded plywood wrapped in linen fabric, an obsolete technology when the company attempted to build the the first jet airliner... unsurprisingly with disastrous results.
@@WilhelmKarsten
Dehavilland had extensive experience of all metal airframe aircraft construction before the DH Comet.
Very interesting video, thanks.
You're welcome
The first Comet crash wasn't the BOAC one you refer to at Calcutta. The first Comet lost was a Canadian Pacific Airlines Comet 1A which crashed on takeoff from Karachi, Pakistan after a fuel stop on its delivery flight March 3, 1953, killing all 11 aboard. That was the first crash of a commercial jet. A BOAC Comet was written off in a non-fatal crash under similar circumstances, resulting in some changes to the wing design and operational procedures. Investigation of those accidents determined that the wing lost lift on takeoff under certain circumstances. The Comet's range also wasn't as good as you mention. Many later production propeller types had much longer range than the Comet. Even the final Comet 4 usually needed a fuel stop on routes like London-New York.
Early turbojet engines were not the most fuel efficient in consumption
Yes, the other fatal design flaw in the Comet no one talks about... the design of the engine inlets
@@Knight6831
In fact, when flying high & fast, which is what turbojets are particularly good at, fuel consumption is good even for early examples such as the De Havilland built ghost engines used in the DH Comet.
The DH Comet. The world's first high altitude pressurised passenger cabin, jet powered airliner, first jet airliner to cross the Atlantic & first jet powered aircraft to complete a global circumnavigation flights series.
@@WilhelmKarsten
*Kharzeestan Krapper DikterBummer and co shud note deferentially with great respect for their infinitely superior superiors.*
*_There was absolutely nothing wrong with the original DH Comet engine air inlet arrangement._*
_Any changes were simply an attempt to make the aircraft more tolerant of pilot error._
@@petemaly8950 Why was de Havilland forced to change the engine design????
7:57 Actually the window issue is a bit of a misconception: ruclips.net/video/-DjnG74DDno/видео.html, but other than that brilliant job with the video once again.
The biggest contribution to aviation from the comet programme was the sharing information they learned from the investigation about metal fatigue.
That's also a misconception, the Comet Disaster was easily preventable if de Haviland had simply followed good engineer practices and employed excepted industry standards.
The only lesson learned from the Comet was that aircraft manufacturers could no longer be trusted to conduct their own crash investigations because of the increasing financial stakes
@@WilhelmKarsten
*_Fryed Ryce Muncherz (Kharzeestan Krapper DikterBummer &co etc ) shud note deferentially with great respect for their infinitely superior superiors & should be aware, their fraud claims about Mr Cunningham are BS, he said no such things._*
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 & the Comet 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%
The DH Comet - World Firsts.
1st gas turbine jet powered airliner. 1st high altitude pressurised passenger cabin airliner.
1st all hydraulically powered flying surface controls airliner.
1st jet airliner aircraft to cross the Atlantic.
1st jet aircraft to do a world circumnavigation flights series.
*Of course De Havilland had experience building many all metal construction airframe aircraft including some of the worlds first successful reliable usable pressurised cockpit mostly metal airframe jet fighters with DH built jet engines that were in service in large numbers ahead of the US & we know Handley Page built the world's first all metal construction Airframe airliner which was built in England in the 1920s.*
*_De Havilland did indeed always work to better than industry standards at the time, no evidence of negligence ever being evidenced in relation to the DH Comet._*
_Pilots actually universally liked the controls & many incidents were due to pilot error flying an unfamiliar type. There was never a lack of lift on rotation, in fact if anything it was too easy to quickly get the nose too high in the air resulting in a takeoff run stall._
_It goes without saying that for example the DH design team design - the BAE-146 was bought by British operators & that aircraft went into service a considerable time after the DH Comet, the world's first jet airliner, went into regular service._
After all these well meant comments I’ll come back with my original comment. Fatigue was known about and stronger construction was built into the comet but THE TREMENDOUS AFFECT THAT PLASTIC DEFORMATION HAD OF INCREASING FATIGUE LIFE WAS NOT KNOWN. The fatigue test fuselage had some plastic deformation from its previous static test which gave it a good fatigue Life, so much so that they never considered fatigue failure in the fuselage so never even looked there.
Following on after my just previous reply re affect of plastic deformation I point out the production fuselages obviously did not have this plastic deformation and their life turned out to be about 3000 cycles not the 16000 cycles of the test. My memory may be at fault it maybe hours . Boeing sure learned from this and used the FAIL SAFE method of certification.
Had the Comet 1 problems been caught earlier and fixed, then what would be the Comet 1 is the historical Comet 2 when then raises a question of what if the comet crashes never happen, how does that affect the plane and aviation
Comet 1 was so deeply flawed and badly designed that it's airworthiness certification was permanently revoked.
Comet 2 was also refused airworthiness certification and never flew in revenue service.
The Comet remains as an example of how not to build jet airliners
@@WilhelmKarsten
Wrong
All mks of produced Comet aircraft had full civilian airworthiness certification after 1954.
All they had to do was change the name. Naming its successor Comet II was as ridiculous as if Cunard built a Titanic II..
The whole tragedy was the result of the need to claim to be first... changing the name would be equally humiliating
@@WilhelmKarsten
Wrong.
The Comet was not the result of DH feeling it necessary to be the first.
The fundamental problem with the De-Havilland Comet is that it was the first jetliner ever built and whatever the aerospace industry knew was based on the older and far slower propliners, whereas Jetliners are completely different ball game meaning everything changes
The fundamental problem with the _Comet Disaster_ was de Havilland had no real experience building modern all-metal aircraft or pressurized cabins.
The real tragedy of the Comet Disaster was nothing was learned by this egregious example of incompetence and criminal negligence.
The Comet Disaster could have been easily prevented if de Haviland had simply followed well-known and understood industry standards for the design and construction of pressurized cabins made from riveted aluminum alloys, unfortunately d-H was still building aircraft fuselages primarily from wood and linen fabric... outdated obsolete technology that was from before WW1.
@@WilhelmKarsten
Wrong.
_DH had built many all metal construction airframe aircraft before the Comet._
*_Comet world firsts -_*
The DH Comet was the world's first jet airliner.
First airliner with all power hydraulic flight controls / actuation.
*First high altitude large pressurised passenger cabin fuselage airliner* (nobody, anywhere, had done a full length 8psi pressurised passenger cabin fuselage, large airliner before the DH Comet or done anything that was equivalent or similar).
*No evidence of criminal negligence was ever produced.*
_At the time De Havilland always worked to better than industry standard practice._
First jet airliner Atlantic crossing.
Worlds first jet airliner global circumnavigation flights series.
Example of accident aircraft losses -
All comet Mks accident airframe losses - 17%
Boeing 707 20%
Lockheed Electra Turboprop - 29%
(The Electra 1st flew 10 years later
than the DH Comet).