Very interesting videos. My son and I had an unusual opportunity to witness a full afterburning J79 about 15 years ago. It was installed in a Peterbuilt tractor at Orlando Speedway in Florida. We were at the starting line, next to the concrete barricade, about 25 feet from the centerline of the engine's thrust. With hands tightly clasped over my ears, when full thrust occurred, as the vehicle moved, I felt the sensation of a pressure wave move across my body in same direction as the vehicle. Probably not the wisest thing I've ever done, but truly unforgettable!
I saw the Apollo-Soyuz launch when I was a boy (1975-ish?) and the roar of those massive Saturn 5 engines shook my lungs from 3 miles away. I've never seen a night-time after-burner run, but I can believe that it would be my 2nd coolest thing if I ever got to see it. Thanks for the shots!!!
Thank you for showing the king of the jet engine in the years of 80's. The hawling sound and long tail flame is in my memeory before the star fighters are replace by the Mirage 2000 now.
My dad was involved in the J 79 power plant. He worked on every airplane that had a J79 in the early 50s and 60s retired in 1975 here at Sheppard Air Force Base
This video is great, JayZ, thanks! I especially love when you folks test on a winter day with snow on the ground. It's majestic as well as engine-nerd fun. If you haven't seen the nighttime J58 test on RUclips, I recommend because I think I counted eight Mach diamonds when it was in afterburner. If you head down to Tucson to visit Pima air and Space Museum, and get away from winter for awhile, let me know and I'll buy you lunch at the diner near the museum. Best chicken fried steak in town.
Back in the late 1960's I saw a pair of F-101B Voodoos takeoff and climb out on AB from Westhampton AFB on Long Island, NY. It was at night and all that was visible were the 2 long AB cones from each aircraft rising fast and then disappearing-Fantastic Sight!. I believe that they were powered by Pratt & Whitney J57-P-55 engines, which are roughly similar to J79s. Soon after that they changed to the F-102 Delta Dagger.
The coolest aeronautical thing that I've ever seen and heard, numerous times? Concorde taking off, variously from Filton, Birmingham and, of course. LHR. And the second coolest thing? Standing in the field behind my house with an Apache appearing low over the hill and heading straight towards me, knowing that my son was the pilot. On second thoughts, emotionally, perhaps that was the coolest thing. In terms of sheer emotion, the births of my daughter and my son - what else could there be?
NZ is my fave. Was there in 2013 for jet boat racing. Made a series of vids call My Kiwi Adventure. The Dart River was incredible. Boat grounded, pushed out by 8 giant NZ men, and pulled by a Jet Ranger. It's all in the vid. And then there was the Waitaki... I grew up on Vancouver Island, which a few Kiwis told me was beautiful. It is, but NZ is even more, in my opinion. Good to hear from you!
I've followed this channel for years at this point, but this video gave them goosebumbs. Thought I've seen enough test cell footage at this point, but this thing is brutal!
Thanks for the bonus at the end! I saw a Shuttle land at Edwards in the late 90s, visited the Cape several times, NASA Houston, SpaceX HQ in LA and spent a week at SpaceX Boca Chica wandering around the site and watching them attach the chopsticks to the tower. Unforgettable.
Wow. What an amazing video JZ !! I can't imagine how that must have sounded and you can see the speed of the exhaust gases in jet wash alley!! Phenomenal piece of engineering. The best video JZ. The complex systems of AB was fascinating would love to more about fuel control and the pilot relationship and how that works.
That was superb and a great explanation of what was going happen beforehand. The sound and vibrations must have been immense standing next to that going at full chat. Everybody has heard a plane taking off at a distance and moving away but to be standing next to it would be awesome. I test large diesel gensets circa 2MW and to hear and feel them at full load is an experience but that would be next level. Nice poppy. All the best.
Can you make some vids about those tests? Any of those engines big 6s, V-8s or maybe V-12s? Such a glorious roaring sound. I add my gearhead vote to the list wanting to see such content.
@ The gensets I currently look after are 2 Mitsubishi V16 diesels at 2000 hp and 1 Rolls Royce V12 diesel at 700hp. And they produce it at 1500rpm!! , revs are constant , only the turbos become ear splitting as the load increases The V16s are about 30 year old and the V12 is nearly 50. The Mitsubishi s sound like big heavy engines, but the Rolls Royce, she sounds like a petrol sports car. I have lots of interesting equipment and machinery at work but sadly due to all the new GDPR, heath and safety, corporate security etc I am not allowed to film my days for RUclips. I don’t know the exact type of Mitsubishi engines but the Rolls is a CV12, here is one like it on yt ruclips.net/video/EPHpLkPBa-s/видео.htmlsi=7u6wzrBNgF0OVn5K All the best. 🏴🇬🇧
I worked for GE at Edwards AFB in the engine shop, GE had a contract with NASA to overhaul the J-79-11 engines on their F-104 aircraft. I was on a headset in the run cell doing run checks etc. The crew running the engine brought the engine rpm up until it was howling and ask me to read the protractor angle for the variable guide vanes, The vibration in the air was so bad my eyes would not focus, the joke was on me I was the new kid Yuk Yuk.
We had our new guy, who's 19, do the same thing on this test. The protractor on this engine is right at the bottom, so he had to lay down underneath the engine. At flight idle, cruise and military power. That's terrifying from 25 yards away. He passed his test!
You my friend have way too much faith in your test bench. That's terrifying. You're very good at explaining how it works though. The best I've seen yet so thank you
Hello @AgentJayZ That wasn't just your "yet another full Moon". That was last SUPERMOON of 2024! So very special afterburner run for very special night. I love the 20:22 part - haunting howl of a very powerful and serious machinery. Thank You for all the work you put into this channel. It's fantastic. I wish we had much more raw technical stuff like this on YT.
I appreciate the comment where you compared the perforated section aft of the flameholders to the combustion liner. I'd figured it was to perforated to provide cooling air, but it makes sense that it provides gradual airflow for the fuel combustion in the AB. Thanks for the night AB footage too! So beautiful!
It does not support combustion, other than maintaining a layer of cooling air to protect the cases from the flame... ... exactly as I describe in this video. did you watch it?
If you want to see some awesome shock diamonds in the AB exhaust, you should have seen an F-8 Crusader in full AB on takeoff. The J-57P20A really put out 30 to 40 feet of flame with beautiful diamonds in it. Hard to forget once you have experienced it.
Those diamonds are cool. The F-35 has a very cool AB flame cone. It rumbles the ground with a deep crackling sound. Only 1 engine in the F-35, but it has a large diameter exhaust nozzle. Very loud.
After seeing a few F-35 demos at Oshkosh, I think that plane has an airshow mode, where it flies in full AB, ripping the sky to shreds, and does not actually move any faster. Pure glorious, beautiful, raging noise. I say yes!
Thanks for the reply AgentJayZ and thanks for a great camera job. It may be true that 4 times the speed of exhaust gas is required for Mach 2 at 10,000 feet
Glorious special footage at the end there. While I have been to a rocket launch, you're so far away that you get just the air crackle that you hear on good footage anyway. Pretty sure you've got a better seat for these runs between the two. 👌 I'd love to see a rocket engine test in person, but as I've been told, it's usually done via closed loop video and loses the brute impact.
Part of the reason this channel exists is because I could not believe that I was allowed to stand behind a jet engine in the test cell. The boss told me "don't get killed", and I was set free. I absolutely had to share that opportunity! In one of my vids, I am actually inside the exhaust nozzle of a J79 as it is being wound up on the starter...
G'day JayZ, Yep cool day here just 21c . Saturday was warm at 36c. Our (Australia) summer is just around the corner. I have nothing to do with gas turbine engines however I still like to learn. cheers , Butch. Edit. Wonderfull vision of the test run, thankyou.
I remember a few weeks ago you explained that it was almost impossible to have a night afterburner video due to noise agreements with the neighbors. Im not sure what y’all did to work around those restrictions, but there’s at least one person on the internet who’s happy that you found a way.
The Norwegian CF-104D in Bodø, the only airworthy F104 in Europe, seems to have a -11 engine (it looks and sounds like it). Latest news they shared is that they are unsure if it every takes to the sky again - mainly due to funding. Hope it flies again!
That A&W change machine reference was nostalgic as hell! Edit: My coolest thing was a static test fire of a space shuttle booster rocket in Utah at night. It is a full body, full sensory experience! I never got to see one light off for a launch though.
Wife: What did you buy?!?! Husband: ....Snow blower. Wife: That is a jet engine! Husband: That blows snow! See? [points to 'Snow Blower 3000-11' written in sharpie on a piece of masking tape stuck, misaligned, to the cowling] Wife: What was wrong with your last snow blower?! Husband: Wasnt a J-79. Wife: ... Husband: ... Wife [if shes worth wifing]: ...Can I try? Husband [if hes smart]: I love you.
A few hundred gallons. We have a thousand gallon tank that was topped off before this couple days of running. We'll need to refill it before any more running.
Gas turbine engines are effectively categorized by their ability to turn fuel and funding into sound, fire, and violence. The trick is keeping the violence inside the casing.
These type of comments, where someone speaks as if they have great knowledge and familiarity, and makes some wry joke, can be tiresome. How many turbojets have you run?
@@AgentJayZ Me? None. I'm just a ..... turbo-fan. HA! TURBO-FAN! Thank you, thank you! Ill be here all week!😁 I was wondering though, I don't recall other engines trenching out the ground downwind of the test shack like that (I could be wrong, I just dont recall if any had before). Is it the short nozzle pedals giving it a wider...uh, plume(? Jet wash? Blowy area? No...that one sounds dirty...), or did this one sit lower in the cell, or at an angle, or just happens from time to time, or?
Hi AgentJayZ, I'd like to share with you and your subscribers the experience I had today. At lunchtime, I took what is for me a regular walk at Severn beach, alongside the estuary of the River Severn (near Bristol, England). I'd just set out when I was aware of an unusual jet noise somewhere overhead. However, it was distinct and clearly not from one of the several airliners leaving contrails high overhead. It took me a few moments to spot a small shape above, which I realised had a twin boom tail. It circled a couple of times before it flew off to the west. It was a DeHavilland Vampire, of which I know that there is only one airworthy example in the UK. However, I've not been able to find out why it was in the air on a frosty autumn day, long after the close of the air show season.
Never seen one fly, but I would like to. My similar experience was seeing a Vickers VC-10 on approach to Calgary some years ago. Is planespotting a thing? Keeping a list of aircraft witnessed flying?
@AgentJayZ yeah plane spotting is a big thing in the uk not man classic jet flying these days so it's great seeing a vampire fly I've had a greyhound and a belguim a400 fly over there very loud but very rare
The Royal New Zealand Air Force had Fifty Eight De Havilland Vampires. I can well remember them flying over our back yard in Devonport. (NZ, not England!) A distinctive sound, quite different to the Boeing 707s that flew over.
Load? 18,300 lbs is the spec at sea level. We beat that at an altitude of over 2000 feet, because of the cold air. Loud? Any SPL meter I've looked at is slammed against the limit as the engine is idling.
Always like the engine runups and afterburners! When looking at the flame in full afterburner mode, why are there faint vertical lines? They are visible in this night footage, and they are also visible on other engines that are using afterburners. Why does that happen?
It seems every engine is a little different, and has a unique personality. What causes the differences in visuals and sound? You can find the exact answer using the sound of Velcro divided by 42, and feeding that into the snowflake equation.
I love it how greenies bitch about my air conditioner running 21degrees c on a hot day here in australia. Ie outside its 36degrees Celsius and 70 to 80 %up humidty... Yeah my tiny little aircons a drop of spit in the water compared to jet engines hahahaha. For a while I got the pleasure of working with some turbo props with p&w's in and man, every time i hear ignitors and the wind up im like a kid in a candy store. Loved this video! Thanks for sharing.
Additionally, in my career, I witnessed many live rocket launches, including at 3200 feet from launch of the first Atlas 2 AS. As the initial pressure waves reached us, the ground shook and the air was forced in and out of my lungs. I was just praying that the vehicle kept flying nominal since we were only about 3 seconds away from an explosion pressure wave should such have occurred.
Great video as it brings back memories, growing up on Canadian airforce bases, of hearing the 104’s. They had such a distinct sound. Do you ever get any J-57’s through your shop? The twin spool compressor and hard light afterburner also created lots of smoke and very distinctive noise as well. Keep up the great work.
The J57 has no industrial use, and the aircraft that use it seem to be more complicated and expensive than most private collectors want. I've never seen one in any shop.
Def. one of those things that the video does no justice. Crazy sound and power. Any idea the velocity in mph of the exhaust as it leaves the engine in different throttle positions? Or is that not measured? I know its irrelevant, but would be a fun figure to know.
We don't measure exhaust velocity, but the variable nozzle is designed to have an exit speed of mach1 at military power, and supersonic in afterburner. The camera can not handle it, but the noise in afterburner is ten times louder than what it is at full dry (military) power.
The maximum velocity at the outlet of a convergent nozzle can only ever be Mach 1, but that is not 767miles/hr, which is the speed of sound in air at 20degC. The speed of sound in air is directly proportional to the square root of the absolute temperature, so the speed of sound in the hot exhaust at military power is substantially higher than 767miles/hr. As a rough calc, with an exhaust gas temperature of 600degC, the exhaust velocity at the exit of a convergent nozzle could be around 1,300miles/hr. In afterburner, the maximum velocity at the throat of a convergent-divergent nozzle is still Mach 1, but with the considerable increase in exhaust temperature, the speed of sound is even higher than this. The divergent section of the nozzle further accelerates the exhaust to a supersonic speed, which is similarly related to the the exhaust gas temperature.
I worked avionics on F-4Cs and F-4Es from 1980 to 1986. The exteriors of the nozzle flaps on our jets at three different bases were flat black, but it seems later on after I'd left the USAF the nozzle exteriors were often shiny bare metal. Were the black nozzle flap exteriors painted, or was it soot staining? The question recently came up on a Facebook group, and I told them I was pretty sure they they were painted, but would you be able to confirm that? Thanks!
A nice even black: painted. A blotchy weathered look: sooty. The soot takes a long time to build up on the outside, but cleaning it off might be considered a waste of extra effort and time by ground crew.
@AgentJayZ Thank you! Hey, a couple years ago you did a video about the TransAir 737 cargo plane that ditched near Honolulu after a supposed double engine failure. The final report was really something, I'm sure you'd be interested. Here's a link to an excellent summary. ruclips.net/video/Nj0M1E0mG6c/видео.htmlsi=ddoXW2JkDAde0UTA
Pretty cool, but we got to see STS-56 take off at 1:30 a.m. from the Air Force base, closet humans aside from NASA types, and it was just pure luck. Our NASA tour bus driver gave us his tickets on the day of the launch (it didn't, but we drove back two days later), and that was the coolest I've seen.
So if that is so loud why is it allowed to run? The engines on the Elvis private jet aren’t allowed to even start because they have no hush kits on them. Another question. Why do the turkey feathers open with afterburner and not close down. One would assume they would create more thrust if they closed down like the candle example
"One would assume", if that one was missing some knowledge about aerodynamics. Both subsonic and supersonic, as they are both very different. As for your first question: location is important, this is not Elvis's jet, and I think you've made many small errors and assumptions here. You might enjoy having a look at one of the books I recommend in my vid called "Books!" Search feature on my channel page.
@ Not that important for me to read a book about it honestly. Watched the vid and just thought I’d ask. As for the “many small errors”, they were very simple questions. See no reason for such an obtuse response. Weird
I know I'm biased (mythumbnail shows me leaning on an EJ200), but what about a Typhoon doing its full display? I last saw it at Bournemouth Air Festival in August. An EJ200 gives 13,000lb thrust max dry and 20,000lb in reheat. That compares to the last mark of Avon in the Lightning, which gave under 16,000lb in reheat.
What are the chances that we see a test of unique/historic engine test of something like an Orenda Iroquois or J57/J75? I’m aware you have an Iroquois but how realistic is it that it could be running in the future? I grew up in the Avro Arrow era and would love to see a piece of it brought back!
The original plan was to get the Iroquois running. The engine in storage at S&S is missing some internal components, a lot of external components, and almost all fasteners. A museum society was formed, and it has access to collaborate with other Canadian museums. I have been to the Canada Aviation and Space Museum in Ottawa, where they famously display an Iroquois engine. I've been to their storage area, and they have many pallets of spare parts for the Iroquois engine. So yes, it would be possible to get ours running, with their parts, and our people and their skills. The two things holding back the progress are: 1: There is some reluctance on the part of the "curators of Canadian aerospace history" to trust a small upstart operation on the West coast with such a project. ( That reluctance was the motivation for my first ever video on RUclips: ruclips.net/video/4L-MsaWx5SA/видео.html ) 2: With a completely disassembled pile of parts that was once the most powerful jet engine in the world, it was going to take a lot of work to get it running. That means work hours, and wages to make that happen. It will be a very expensive process, with no public or government support. The current owners, upon the realization that it will take somewhere near a million dollars to get this thing running on our test cell, for no real purpose other than national pride and satisfaction, have decided not to spend that money. As promised, whenever anything happens with this project, I will have an update. PS: You know that story about the Orenda Iroquois in that museum? How on the right side of the compressor case, facing the wall and behind the crowd barrier, that there's a big hole cut into the compressor casing, so it can never be made to run? In 2013 AgentJayZ snuck though the barrier and took a long look. There is no hole. 15 years ago, an offer was made to the museum that if they lent out that thing, it would be made to run, and then returned in running condition. The aforementioned reluctance stopped that idea cold. So, we need a wealthy Canadian to donate a workspace and a million dollars to get things moving. I would love to do it in my shop!
@ Wow how unfortunate, so close yet so far at the same time. Basically gate keeping a piece of Canadian history but I completely understand the idea of it being a financial hassle!
@ Also I don’t know if you caught my other part of my original comment as well but the J75 did fly on the Arrow and saw flight time over the Iroquois which funny enough was intended to be the Arrow’s propulsion, what I was trying to get at was has anyone ever came to you with a J75 or a similar engine like the J57? Those two engines were an absolute staple of their time period and went along like peanut butter and jelly with their parent aircraft during that time period.
![Blox Fruits Dragon Rework Update [Full Stream]](http://i.ytimg.com/vi/EqDAp8udhm0/mqdefault.jpg)
I've been watching this fella for like 15 years. still at it
First vid put up in 2007.
Who you talking to?
@@AgentJayZ haha you? glad your still doing it. love it.
Very interesting videos. My son and I had an unusual opportunity to witness a full afterburning J79 about 15 years ago. It was installed in a Peterbuilt tractor at Orlando Speedway in Florida. We were at the starting line, next to the concrete barricade, about 25 feet from the centerline of the engine's thrust. With hands tightly clasped over my ears, when full thrust occurred, as the vehicle moved, I felt the sensation of a pressure wave move across my body in same direction as the vehicle. Probably not the wisest thing I've ever done, but truly unforgettable!
I saw the Apollo-Soyuz launch when I was a boy (1975-ish?) and the roar of those massive Saturn 5 engines shook my lungs from 3 miles away.
I've never seen a night-time after-burner run, but I can believe that it would be my 2nd coolest thing if I ever got to see it.
Thanks for the shots!!!
Saturn 5 F1 engines have 2 tons of liquid oxygen and 1 ton of kerosene going through it each second. Now that's amazing.
That afterburner at night was beautiful
Thank you for showing the king of the jet engine in the years of 80's. The hawling sound and long tail flame is in my memeory before the star fighters are replace by the Mirage 2000 now.
My dad was involved in the J 79 power plant. He worked on every airplane that had a J79 in the early 50s and 60s retired in 1975 here at Sheppard Air Force Base
Thank you for going outside, in the freezing cold, to get that footage. It was awesome.
This video is great, JayZ, thanks! I especially love when you folks test on a winter day with snow on the ground. It's majestic as well as engine-nerd fun. If you haven't seen the nighttime J58 test on RUclips, I recommend because I think I counted eight Mach diamonds when it was in afterburner.
If you head down to Tucson to visit Pima air and Space Museum, and get away from winter for awhile, let me know and I'll buy you lunch at the diner near the museum. Best chicken fried steak in town.
Thank You for Your time and efforts Agent Zed.
That was informative and enjoyable.
Best Wishes to You and Your Family.
A&W change machine - what a blast from the past.
Loved the afterburner shots - amazing!
Back in the late 1960's I saw a pair of F-101B Voodoos takeoff and climb out on AB from Westhampton AFB on Long Island, NY. It was at night and all that was visible were the 2 long AB cones from each aircraft rising fast and then disappearing-Fantastic Sight!. I believe that they were powered by Pratt & Whitney J57-P-55 engines, which are roughly similar to J79s. Soon after that they changed to the F-102 Delta Dagger.
The F-4 Phantom had TWO of these! 😳
( It dug a nice trench behind the building! ) 😆
The coolest aeronautical thing that I've ever seen and heard, numerous times? Concorde taking off, variously from Filton, Birmingham and, of course. LHR. And the second coolest thing? Standing in the field behind my house with an Apache appearing low over the hill and heading straight towards me, knowing that my son was the pilot. On second thoughts, emotionally, perhaps that was the coolest thing.
In terms of sheer emotion, the births of my daughter and my son - what else could there be?
This is Awesome! Hello From New Zealand!
NZ is my fave. Was there in 2013 for jet boat racing. Made a series of vids call My Kiwi Adventure.
The Dart River was incredible. Boat grounded, pushed out by 8 giant NZ men, and pulled by a Jet Ranger. It's all in the vid.
And then there was the Waitaki...
I grew up on Vancouver Island, which a few Kiwis told me was beautiful.
It is, but NZ is even more, in my opinion.
Good to hear from you!
@@AgentJayZ Next time you will be in NZ let me know ill get you a beer!
I've followed this channel for years at this point, but this video gave them goosebumbs. Thought I've seen enough test cell footage at this point, but this thing is brutal!
Thanks for the bonus at the end! I saw a Shuttle land at Edwards in the late 90s, visited the Cape several times, NASA Houston, SpaceX HQ in LA and spent a week at SpaceX Boca Chica wandering around the site and watching them attach the chopsticks to the tower. Unforgettable.
OK, so not only is this a killer snowblower, it cleared-out the rocks as well. Thanks for the night footage.
Do you hear that? That is the sound of freedom!
AgentJayZ, the sreaming as you call it, is for us Starfighter'nuts' the most beautiful sound that exists!!! ;-)
Very cool - a starfighter held pride of place in my childhood model collection 😊😊
Mine too!
Wow. What an amazing video JZ !! I can't imagine how that must have sounded and you can see the speed of the exhaust gases in jet wash alley!! Phenomenal piece of engineering. The best video JZ. The complex systems of AB was fascinating would love to more about fuel control and the pilot relationship and how that works.
Thank you for the bonus.
Fan-friggin-tabulous footage. Thank you so much!
Another great video and the night footage was super cool.
That was superb and a great explanation of what was going happen beforehand. The sound and vibrations must have been immense standing next to that going at full chat. Everybody has heard a plane taking off at a distance and moving away but to be standing next to it would be awesome. I test large diesel gensets circa 2MW and to hear and feel them at full load is an experience but that would be next level. Nice poppy. All the best.
Can you make some vids about those tests? Any of those engines big 6s, V-8s or maybe V-12s?
Such a glorious roaring sound. I add my gearhead vote to the list wanting to see such content.
@ The gensets I currently look after are 2 Mitsubishi V16 diesels at 2000 hp and 1 Rolls Royce V12 diesel at 700hp. And they produce it at 1500rpm!! , revs are constant , only the turbos become ear splitting as the load increases The V16s are about 30 year old and the V12 is nearly 50. The Mitsubishi s sound like big heavy engines, but the Rolls Royce, she sounds like a petrol sports car. I have lots of interesting equipment and machinery at work but sadly due to all the new GDPR, heath and safety, corporate security etc I am not allowed to film my days for RUclips. I don’t know the exact type of Mitsubishi engines but the Rolls is a CV12, here is one like it on yt ruclips.net/video/EPHpLkPBa-s/видео.htmlsi=7u6wzrBNgF0OVn5K All the best. 🏴🇬🇧
@@AgentJayZ A lot of locomotive power units are V16 2-Stroke Diesels
I worked for GE at Edwards AFB in the engine shop, GE had a contract with NASA to overhaul the J-79-11 engines on their F-104 aircraft. I was on a headset in the run cell doing run checks etc. The crew running the engine brought the engine rpm up until it was howling and ask me to read the protractor angle for the variable guide vanes, The vibration in the air was so bad my eyes would not focus, the joke was on me I was the new kid Yuk Yuk.
We had our new guy, who's 19, do the same thing on this test. The protractor on this engine is right at the bottom, so he had to lay down underneath the engine. At flight idle, cruise and military power. That's terrifying from 25 yards away. He passed his test!
You my friend have way too much faith in your test bench. That's terrifying. You're very good at explaining how it works though. The best I've seen yet so thank you
I have a playlist about our test cell. The test stand is made of the same type of steel that large buildings are made with.
I’ve seen many solid and liquid rocket launches and static tests. Up close and personal. This is still pretty darn cool.
It is never a bad day when you get to see shock diamonds.
Hello @AgentJayZ
That wasn't just your "yet another full Moon". That was last SUPERMOON of 2024! So very special afterburner run for very special night.
I love the 20:22 part - haunting howl of a very powerful and serious machinery.
Thank You for all the work you put into this channel. It's fantastic. I wish we had much more raw technical stuff like this on YT.
You made my day with the night footage of the afterburner.
So violent. I love it.
I appreciate the comment where you compared the perforated section aft of the flameholders to the combustion liner. I'd figured it was to perforated to provide cooling air, but it makes sense that it provides gradual airflow for the fuel combustion in the AB. Thanks for the night AB footage too! So beautiful!
It does not support combustion, other than maintaining a layer of cooling air to protect the cases from the flame... ... exactly as I describe in this video. did you watch it?
@@AgentJayZ I guess it still early in the morning and the comparison to the combustion cannister threw me a bit. Sorry to have bothered you.
That was badass! Thanks for sharing!
JAY! is back!
I love watching the mach diamonds in the AB exhaust.
An awesome video as usual Agent Jay Z.
If you want to see some awesome shock diamonds in the AB exhaust, you should have seen an F-8 Crusader in full AB on takeoff. The J-57P20A really put out 30 to 40 feet of flame with beautiful diamonds in it. Hard to forget once you have experienced it.
Those diamonds are cool. The F-35 has a very cool AB flame cone. It rumbles the ground with a deep crackling sound. Only 1 engine in the F-35, but it has a large diameter exhaust nozzle. Very loud.
After seeing a few F-35 demos at Oshkosh, I think that plane has an airshow mode, where it flies in full AB, ripping the sky to shreds, and does not actually move any faster. Pure glorious, beautiful, raging noise. I say yes!
@@AgentJayZ Fat Amy can boogie!
The F104 is one of my favorite aircraft.
Thanks for the reply AgentJayZ and thanks for a great camera job. It may be true that 4 times the speed of exhaust gas is required for Mach 2 at 10,000 feet
I love the throttle transition sounds of the F-15s in the pattern....
Love me a bit of dash 11 footage. Thumbs up from me!
Glorious special footage at the end there. While I have been to a rocket launch, you're so far away that you get just the air crackle that you hear on good footage anyway. Pretty sure you've got a better seat for these runs between the two. 👌 I'd love to see a rocket engine test in person, but as I've been told, it's usually done via closed loop video and loses the brute impact.
Part of the reason this channel exists is because I could not believe that I was allowed to stand behind a jet engine in the test cell. The boss told me "don't get killed", and I was set free. I absolutely had to share that opportunity!
In one of my vids, I am actually inside the exhaust nozzle of a J79 as it is being wound up on the starter...
Hot video! Many thanks.
Worked on -15 engines at Udorn Thailand in the F4 engine shop in 70-71 USAF
For a second I saw X-15, and I got a bit too excited.
That is so damn cool
G'day JayZ, Yep cool day here just 21c . Saturday was warm at 36c. Our (Australia) summer is just around the corner. I have nothing to do with gas turbine engines however I still like to learn. cheers , Butch.
Edit. Wonderfull vision of the test run, thankyou.
We've got a Scotsman, who calls Oz his hometown, working up here. Can't be many who fit that description, eh?
I remember a few weeks ago you explained that it was almost impossible to have a night afterburner video due to noise agreements with the neighbors.
Im not sure what y’all did to work around those restrictions, but there’s at least one person on the internet who’s happy that you found a way.
The Norwegian CF-104D in Bodø, the only airworthy F104 in Europe, seems to have a -11 engine (it looks and sounds like it). Latest news they shared is that they are unsure if it every takes to the sky again - mainly due to funding. Hope it flies again!
That CF-104D uses an OEL7, not a GE11, but it sounds just as good, if not better.
That A&W change machine reference was nostalgic as hell!
Edit: My coolest thing was a static test fire of a space shuttle booster rocket in Utah at night. It is a full body, full sensory experience! I never got to see one light off for a launch though.
That AB footage was awesome.
That snow blower would clear my driveway in a matter of seconds but at a slightly higher fuel cost than a Briggs & Stratton powered snow blower.
Wife: What did you buy?!?!
Husband: ....Snow blower.
Wife: That is a jet engine!
Husband: That blows snow! See? [points to 'Snow Blower 3000-11' written in sharpie on a piece of masking tape stuck, misaligned, to the cowling]
Wife: What was wrong with your last snow blower?!
Husband: Wasnt a J-79.
Wife: ...
Husband: ...
Wife [if shes worth wifing]: ...Can I try?
Husband [if hes smart]: I love you.
The best
Thanks
Night Afterburner is the best. I see Mach diamonds!
Incredible!
How much fuel was burned in that test?
A few hundred gallons. We have a thousand gallon tank that was topped off before this couple days of running. We'll need to refill it before any more running.
Watching an SR71 roll out and ignite the afterburners was my top
I've seen night shuttle launches. I've also seen F-106s night launch out of Great Falls IAP. That was impressive, too.
Looks so insanely violent.
Gas turbine engines are effectively categorized by their ability to turn fuel and funding into sound, fire, and violence. The trick is keeping the violence inside the casing.
These type of comments, where someone speaks as if they have great knowledge and familiarity, and makes some wry joke, can be tiresome. How many turbojets have you run?
@@AgentJayZ Me? None. I'm just a ..... turbo-fan.
HA! TURBO-FAN! Thank you, thank you! Ill be here all week!😁
I was wondering though, I don't recall other engines trenching out the ground downwind of the test shack like that (I could be wrong, I just dont recall if any had before). Is it the short nozzle pedals giving it a wider...uh, plume(? Jet wash? Blowy area? No...that one sounds dirty...), or did this one sit lower in the cell, or at an angle, or just happens from time to time, or?
MAN... that brings back memories... installing... R&R many of those in the F-15 in the navy....
@@billnone3173 F-14?
@@freddaugherty7829 yeah... it was only 40+ years ago... LOL
Hi AgentJayZ,
I'd like to share with you and your subscribers the experience I had today.
At lunchtime, I took what is for me a regular walk at Severn beach, alongside the estuary of the River Severn (near Bristol, England). I'd just set out when I was aware of an unusual jet noise somewhere overhead. However, it was distinct and clearly not from one of the several airliners leaving contrails high overhead.
It took me a few moments to spot a small shape above, which I realised had a twin boom tail. It circled a couple of times before it flew off to the west. It was a DeHavilland Vampire, of which I know that there is only one airworthy example in the UK. However, I've not been able to find out why it was in the air on a frosty autumn day, long after the close of the air show season.
Never seen one fly, but I would like to.
My similar experience was seeing a Vickers VC-10 on approach to Calgary some years ago.
Is planespotting a thing? Keeping a list of aircraft witnessed flying?
@AgentJayZ yeah plane spotting is a big thing in the uk not man classic jet flying these days so it's great seeing a vampire fly I've had a greyhound and a belguim a400 fly over there very loud but very rare
The Royal New Zealand Air Force had Fifty Eight De Havilland Vampires. I can well remember them flying over our back yard in Devonport. (NZ, not England!) A distinctive sound, quite different to the Boeing 707s that flew over.
WOW! Loved it! Thanks!!
Awesome night shot! I remember asking you a few years back if y’all ever do a night time run and you said nope.
100% agree cool!, this is what youtube is for!
Brings back memories of burner runs in the hush house at Seymour Johnson, nc. F-15E’s.
The thrust diamonds in that second to last afterburner shot @ 31:10 👀👀👀
I have seen attack ships on fire off the shoulder of Orion. I have watched C beams glitter in the dark near the Tannhhauser gate. But that was close
All those moment.....lost....like snow and gravel down the loading ramp....time to fly....
pretty darn cool.
Nice, thanks!
Jee-zus. Can I borrow that rig? I have a whole bunch of land that needs clearing. 😅👍
Yea an F104 engine, thank you 👍🔥
31:33 Coolest thing seen → Night launch of Space Shuttle with perfect visibility till the Shuttle curved down over the horizon. Lucked into that one.
I see winter came in earnest up there as well. Too soon. brrrrr
I can never get enough GE J79 turkey feathers and night time after burners!
Well this made my day, great video. Have you ever measured how load it gets?
Load? 18,300 lbs is the spec at sea level. We beat that at an altitude of over 2000 feet, because of the cold air.
Loud? Any SPL meter I've looked at is slammed against the limit as the engine is idling.
Always like the engine runups and afterburners! When looking at the flame in full afterburner mode, why are there faint vertical lines? They are visible in this night footage, and they are also visible on other engines that are using afterburners. Why does that happen?
It seems every engine is a little different, and has a unique personality. What causes the differences in visuals and sound?
You can find the exact answer using the sound of Velcro divided by 42, and feeding that into the snowflake equation.
Great video and thanks for teh goosebumps! Are there still J-79-OEL-7s kicking around?
We have one in storage, freshly overhauled. They are rare.
Just as I was thinking "An afterburner might be a form of ram jet" Agent JZ told us that's true.
Holy cow that J79 is an excavator, it dug up that yard and moved rock.
Nice to see some snow up there.
We should have a lot more by now.
I love it how greenies bitch about my air conditioner running 21degrees c on a hot day here in australia. Ie outside its 36degrees Celsius and 70 to 80 %up humidty... Yeah my tiny little aircons a drop of spit in the water compared to jet engines hahahaha.
For a while I got the pleasure of working with some turbo props with p&w's in and man, every time i hear ignitors and the wind up im like a kid in a candy store. Loved this video! Thanks for sharing.
Check out my many other test run vids...
7:20 Roller cam, pushrods, and rings?
Would have never guessed it (on a jet turbine) 😂
Inside the variable nozzle hydraulic actuators, there are piston rings.
Awesome
Additionally, in my career, I witnessed many live rocket launches, including at 3200 feet from launch of the first Atlas 2 AS. As the initial pressure waves reached us, the ground shook and the air was forced in and out of my lungs. I was just praying that the vehicle kept flying nominal since we were only about 3 seconds away from an explosion pressure wave should such have occurred.
Great video as it brings back memories, growing up on Canadian airforce bases, of hearing the 104’s. They had such a distinct sound. Do you ever get any J-57’s through your shop? The twin spool compressor and hard light afterburner also created lots of smoke and very distinctive noise as well. Keep
up the great work.
The J57 has no industrial use, and the aircraft that use it seem to be more complicated and expensive than most private collectors want. I've never seen one in any shop.
Def. one of those things that the video does no justice. Crazy sound and power. Any idea the velocity in mph of the exhaust as it leaves the engine in different throttle positions? Or is that not measured? I know its irrelevant, but would be a fun figure to know.
We don't measure exhaust velocity, but the variable nozzle is designed to have an exit speed of mach1 at military power, and supersonic in afterburner.
The camera can not handle it, but the noise in afterburner is ten times louder than what it is at full dry (military) power.
The maximum velocity at the outlet of a convergent nozzle can only ever be Mach 1, but that is not 767miles/hr, which is the speed of sound in air at 20degC.
The speed of sound in air is directly proportional to the square root of the absolute temperature, so the speed of sound in the hot exhaust at military power is substantially higher than 767miles/hr.
As a rough calc, with an exhaust gas temperature of 600degC, the exhaust velocity at the exit of a convergent nozzle could be around 1,300miles/hr.
In afterburner, the maximum velocity at the throat of a convergent-divergent nozzle is still Mach 1, but with the considerable increase in exhaust temperature, the speed of sound is even higher than this.
The divergent section of the nozzle further accelerates the exhaust to a supersonic speed, which is similarly related to the the exhaust gas temperature.
I worked avionics on F-4Cs and F-4Es from 1980 to 1986. The exteriors of the nozzle flaps on our jets at three different bases were flat black, but it seems later on after I'd left the USAF the nozzle exteriors were often shiny bare metal. Were the black nozzle flap exteriors painted, or was it soot staining? The question recently came up on a Facebook group, and I told them I was pretty sure they they were painted, but would you be able to confirm that? Thanks!
A nice even black: painted. A blotchy weathered look: sooty. The soot takes a long time to build up on the outside, but cleaning it off might be considered a waste of extra effort and time by ground crew.
@AgentJayZ Thank you!
Hey, a couple years ago you did a video about the TransAir 737 cargo plane that ditched near Honolulu after a supposed double engine failure. The final report was really something, I'm sure you'd be interested. Here's a link to an excellent summary. ruclips.net/video/Nj0M1E0mG6c/видео.htmlsi=ddoXW2JkDAde0UTA
Lol. You mention a Facebook group, I remember how I got here.
Thanks :)
Pretty cool, but we got to see STS-56 take off at 1:30 a.m. from the Air Force base, closet humans aside from NASA types, and it was just pure luck. Our NASA tour bus driver gave us his tickets on the day of the launch (it didn't, but we drove back two days later), and that was the coolest I've seen.
I was going to suggest doing my driveway next... until I saw the giant gully it excavated.
So if that is so loud why is it allowed to run? The engines on the Elvis private jet aren’t allowed to even start because they have no hush kits on them. Another question. Why do the turkey feathers open with afterburner and not close down. One would assume they would create more thrust if they closed down like the candle example
"One would assume", if that one was missing some knowledge about aerodynamics. Both subsonic and supersonic, as they are both very different.
As for your first question: location is important, this is not Elvis's jet, and I think you've made many small errors and assumptions here. You might enjoy having a look at one of the books I recommend in my vid called "Books!"
Search feature on my channel page.
@ Not that important for me to read a book about it honestly. Watched the vid and just thought I’d ask. As for the “many small errors”, they were very simple questions. See no reason for such an obtuse response. Weird
Very cool!
Starfighter: is it from a an eagle, form a Viper Mark 1, or from a x-wing ? :D
Well I guess that for it's era the F104 was kind of a space ship
I worked on both the -15 and the -17 back in the 70s
Happy Super Beaver Moon!
yes, pretty dam cool it is !!
That's hot.
That load cell is killer...curious what its rated for... and how the load cells are calibrated on the engine test stand...
Definitely v cool. My best experience was seeing vertical climb by a EE Lightning in the early 80s with full reheat. I felt it.
I know I'm biased (mythumbnail shows me leaning on an EJ200), but what about a Typhoon doing its full display? I last saw it at Bournemouth Air Festival in August.
An EJ200 gives 13,000lb thrust max dry and 20,000lb in reheat. That compares to the last mark of Avon in the Lightning, which gave under 16,000lb in reheat.
What are the chances that we see a test of unique/historic engine test of something like an Orenda Iroquois or J57/J75? I’m aware you have an Iroquois but how realistic is it that it could be running in the future? I grew up in the Avro Arrow era and would love to see a piece of it brought back!
The original plan was to get the Iroquois running. The engine in storage at S&S is missing some internal components, a lot of external components, and almost all fasteners. A museum society was formed, and it has access to collaborate with other Canadian museums. I have been to the Canada Aviation and Space Museum in Ottawa, where they famously display an Iroquois engine.
I've been to their storage area, and they have many pallets of spare parts for the Iroquois engine.
So yes, it would be possible to get ours running, with their parts, and our people and their skills.
The two things holding back the progress are:
1: There is some reluctance on the part of the "curators of Canadian aerospace history" to trust a small upstart operation on the West coast with such a project.
( That reluctance was the motivation for my first ever video on RUclips: ruclips.net/video/4L-MsaWx5SA/видео.html )
2: With a completely disassembled pile of parts that was once the most powerful jet engine in the world, it was going to take a lot of work to get it running. That means work hours, and wages to make that happen. It will be a very expensive process, with no public or government support.
The current owners, upon the realization that it will take somewhere near a million dollars to get this thing running on our test cell, for no real purpose other than national pride and satisfaction, have decided not to spend that money.
As promised, whenever anything happens with this project, I will have an update.
PS: You know that story about the Orenda Iroquois in that museum? How on the right side of the compressor case, facing the wall and behind the crowd barrier, that there's a big hole cut into the compressor casing, so it can never be made to run? In 2013 AgentJayZ snuck though the barrier and took a long look. There is no hole.
15 years ago, an offer was made to the museum that if they lent out that thing, it would be made to run, and then returned in running condition. The aforementioned reluctance stopped that idea cold.
So, we need a wealthy Canadian to donate a workspace and a million dollars to get things moving.
I would love to do it in my shop!
@ Wow how unfortunate, so close yet so far at the same time. Basically gate keeping a piece of Canadian history but I completely understand the idea of it being a financial hassle!
@ Also I don’t know if you caught my other part of my original comment as well but the J75 did fly on the Arrow and saw flight time over the Iroquois which funny enough was intended to be the Arrow’s propulsion, what I was trying to get at was has anyone ever came to you with a J75 or a similar engine like the J57? Those two engines were an absolute staple of their time period and went along like peanut butter and jelly with their parent aircraft during that time period.