A4 / V2 Rocket in detail: Turbopump Part 2
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- čas přidán 4. 07. 2024
- Your view of the V2 rocket will never be the same again. In this long-awaited video, a follow-up to Turbopump Part 1 from 2019, we continue exploring the A4/V2 steam turbine-driven propellant pumps. Robert investigates some little-known features and phenomena associated with the operation of the turbopump system - phenomena that, more than 80 years later, still have great significance for today's mighty rockets - the descendants of the V2. (Want to help us make more videos like this? See our Patreon link below.)
00:00 Start
00:45 Introduction
01:20 Turbopump as a gyroscope
28:42 Whirling Devil
37:31 The Over speed switch
58:05 The V2s secret rocket afterburner
1:23:14 How were the turbine blades fitted?
1:32:31 Turbopump healthcheck
1:45:41 Coming up
1:46:09 Closing credits
1 Turbopump as a gyroscope
First, we look in detail at the gyroscopic influence of the fast-spinning masses in the turbine-driven pump system.
The 400hp turbine spins the pump impellers and every rotating component associated with them, including the liquid propellents, at 4000rpm, and these combined rotating masses possess plenty of angular momentum. What effect, if any, might this have on the missile's flight? And what about the dangerously high kinetic energy in this fast-rotating mass?
2 The Whirling Devil
Looks at the risk of operating such a violent and aggressive pump system on such a fragile and potentially (in fact, deliberately!) explosive vehicle.
3 Over speed switch
Here we explore the vital safety logic behind the turbopump's kill switch - the method of stopping the turbine permanently - and, ultimately, the rocket engine if the turbine runs too fast. We explain exactly why this was done and why it is so vital to the survival of the missile.
4 The V2's Top Secret afterburner
So "secret" was the V2's afterburner that most of the German designers of the A4/V2 didn't know about it!
The V2 rocket's afterburner wasn't discovered and fully understood until 1949 when American technicians began to perform high-altitude studies of the V2's jet flame using high-powered telescopes.
5 How are the turbine rotor blades fitted?
This is a question posed by many viewers of Part 1, curious to know how the turbine blades were fitted to the rotor wheel edge, given that - unlike the simplified model shown in Part 1 - the wheel holds the blades in tightly machined slots and it has no visible opening by which the blades can be introduced.
6 Turbopump health check
How did the V2 missile technicians determine how the turbopump and the steam generation system performed? We look at film evidence and sound to understand how turbopump health was assessed in an era with only rudimentary telemetry technology.
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Although Turbopump Part 2 was three years in the making, very little of that time was spent in front of a camera. Most of the time and effort was spent in research and you see the culmination in the hour-and-three-quarter video presented here.
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Robert J Dalby
Presented by Robert J Dalby FRAS
MGM Studios clip
Copyright Disclaimer: Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favour of fair use. - Věda a technologie
Good god! I've watched Part 1 ten times over the years. This feels like the glory days of BBC science and OU. Wonderful.
there's a definite feel of Tim Hunkin when the simulated turbopump starts disassembling itself 😁
Out of all the "part 2"s that took forever to be released, this is one of the best and most appreciated!
All right. I was worried something happened to him. We a have a refreshed v2 exhibit at the cosmosphere at hutchinson, kansas. His videos have helped to appreciate the display so much more. Thank you very much!!
Thanks, and good to hear about the V2 exhibit. It depends on what you mean; something did happen to me, I got four years older and five minutes wiser, and we all lived through the strange and unwelcome period of the pandemic. But I'm still fiddling with old rockets, so in that regard... KR RJD A&NTV
This was absolutely SUPERB!! Well done, and worth the long wait! So much excellent analysis and loved the experimental aspects with gyroscopes and more. I will pass this on to all my fellow rocket enthusiasts !!
Ugh! I can’t believe I’m just seeing this now! I’ve been waiting for this part 2 FOREVER! So happy 🎉
Utterly fascinating , excellently produced and brilliant subject knowledge.
Great Information. At 1.30,22 the drawing notes „verstemmt“ which would mean peened or pinned but not glued as you suggested.
Thank you for sharing your knowledge. Near my hometown we have had several launchsites. Antwerp was the target from here.
Thank you again ! 👍🏻
My own translation for 'Verstemt' would be 'clamped permanently with plastic deformation.'
The centrifugal overspeed trip is still used today. For instance a GE Frame 6 gas turbine generator uses a centrifugally activated weight mounted on one of the shafts of the accessory gearbox to trip a hydraulic valve and dump pressure to the normally closed fuel valves. With no pressure, springs force the valves closed, cutting off fuel.
I have been waiting for this since 2019. Thanks for making this .. currently watching live 😍
Please, please, please continue adding more insightful videos; can't get enough!
finally! part 2!
I need to watch this at least a dozen times.😮
My first wife's father was a project manager on the turbo pumps for the space shuttles main engines. I regret that I wasn't more interested in the subject at the time, because I am facinated by it now, and I love your videos. Rocketdyne was literally right down the street from my house, and in fact we were on the same street, Canoga Ave., my house was 4430, RD was 6633. More than a few of my friends parents woked there as well.
Bro just doxxed himself 😂😂😂
@@lukashohoff4200 lol😂😂😂
Past tense........
My God, this second part was worth waiting for!
Outstanding presentation, Robert!
I promise to watch it several times, like part 1
I love these episodes!
Without doubt, the Astronomy and Nature TV's channel on the design and development of the A4/V2 is the most well-researched and presented series of videos on CZcams. The comprehensive use of models, real artefacts, period film footage and design drawings to explain how the rocket worked is second to none. Simply superb!
I have no words. Magnificent video 👍👍👏👏
The answer to Mr. Edson's question is , Yes! PDE (Pulse Detonation Engines) and aerospikes. I love your videos! You're an awesome human being and a credit to the whole human race. Thank you for sharing your obsessions with us!
Great video!
Yay. This is one of my favorite CZcams channels. Excellent use of models, diagrams and archive footage. The way you present this makes every bit of the V2 fascinating. With proper explanation one can appreciate all the design considerations they had to make for this rocket to function. Hats off for your effort.
Your practical demonstrationskills at the bench are quite excellent in explaining things.
That was good, thanks, cant wait for next one. Still watching old ones when i need a refresh. 👍
What a great deep dive into the technical bits of rocket history. Your use of simplified models make a complex subject much more comprehensible. Thank you for your hard work Mr. Dalby.
Very impressive and interesting video!!!!! Great!! Thanks!
Schnellschluss Ventil: schluss comes from schliessen, to close, so quick closure valve.
Unburnt cooling fuel can very nicely been seen in the Saturn 5 footages as a black shadow.
Guidance and control is going to be so interesting
Congratulations Robert, superb work. Many thanks.
IT’S FINALLY HERE!!!! Thank you for all your hard work, that was absolutely fantastic! I learned a lot and your demonstrations are phenomenal. Keep it up, can’t wait for more content!
Thank you for yet another amazing video.
Thank you for putting this together you have explained it in a way that an ordinary person can understand it
yes. i thought that too. i have a mechanical engineering degree but was still fearful this would be far too advanced for me. instead, it was a pleasure to watch and a reminder that people who really know their onions can explain complicated ideas simply and not blind you with science unnecessarily.
Love you in-depth videos. Thank for all the details and bringing to light the engineering challenges and how they were overcome.
Another beautifully put-together video about one of my favourite engineering topics. Bloody well done!
A massive thank You for making those videos!!
Fantastic! You really are an expert. Really enjoyed the level of detail you went into. Today’s mainstream tv documentaries are dumbed down. Thanks for taking all the time & effort to produce this
Fabulous information, well worth the wait. I'm in awe of the engineering that went into that rocket during a time a war was being conducted and many other projects in the works simultaneously.
Incredible amount of detail and knowledge! Thank you so much 🙂
I really enjoy the technical details you cover with the complexity of how the V2 was built. 👍🚀🙂
The most informative video I have ever watched. Everyone is enthralled........Brilliant.
I would love a book collecting those blueprints he shows!
A fantastic and well-researched video. One of the best I've seen on CZcams. Congratulations.
This is absolutely wonderful, thanks so much for doing these.
Amazing documentary series. I can't turn it off!!
Wow, fantastic documentary video again. Thank you Robert!
Awesome, excellent presentation! Thank you!
Fascinating, I was glued . Great work really well explained. Thank you.
1:21:44 this entire segment kept whispering in my cerebrum "aerospike ... aerospike."
YOUR BACK!!!!!! holy moly im so excited to watch another one of your videos! I absolutely love watching every single one of your videos multiple times over! So glad to see a part 2, thank you so much for your amazing videos!
Hi and thanks. We never went away, so maybe think about subscribing so you don't miss anything new. KR RJD A&NTV
These are great videos and an important aid to teaching.
A gripping video. I really can’t say enough about it. I’ve watched all the “V”ideos and they’re fantastic
I have waited for this for so long! Thank you!!!
fabulous video
This video, and its predecessor, are simply tours de force of historical engineering documentary. Remarkable, Robert and colleagues.
Another great expose of the V-2's turbopump.Superb!
Fantastic work!
That was excellent! The sound track was amazing...
Fantastic! Thank you!
It felt like Christmas was here when I saw this video posted. I love the first video and this I believe is even better. I wish I had had you as a mechanical engineering teacher! You have a wonderful mind for being able to present the examples that explain very complex mechanisms and how they operate. My sincere thanks to you!
thank you for making this video. it was a pleasure to watch. :)
thank you god only knows how I waited and hoped for pt2!
OUTSTANDING als always !!!! LOVE it :)
Great stuff, thanks a lot!
Another amazing video, thank you!
Thank you so much for this! Mind blown multiple times! Seriously considering becoming a patron!
Just fascinating!! Can’t wait for next part!!!
Should be out 4 years from now 😂😂😂
Absolutely worth waiting
Awesome video…..thank you so much
Awesome production.
Yay! My favorite youtube video has a follow-up.
Absolutely superb!
Very nice, thanks!
Excellent!!
Thanks for sharing. 😉👌🏻
Very nice demo with the balloons. Effective presentation.
Great video, waiting for more
Brilliant demonstration and explanation.
All thumbs up 👍
Greetings from Germany
Robert, super results. I know how much work one of your productions requires and I must say that you outdid yourself. Your humor spots were not lost on me either! -Tracy
Thanks Tracy, I cut out the piece with 'Artful Dodger' as a short as you suggested. You can see it here: czcams.com/users/shortsnInEYVR5U4Q KR Rob
Thank you again for great information presented in a way a layman can understand!
your logic is excellent!
That's incredible. I never considered the gyroscopic effect turbo pumps and fuel pumps would have on a rocket. It's extremely obvious now that you've said something. Can't wait to watch the rest of the video to hear you explain it.
Bellissimo video, complimenti!!
I can't believe this has finally come up in my feed! We're all a little greyer since the last instalment!
We, here in the Turbopump Lovers Fan Club were waiting for this Part 2 for long time.. 😊 Well done, again! 🎉
Legend is back
Thanks from Germany! Great Content and explanations!
Hi Maik. Many thanks for supporting my work - I appreciate your contribution. Every donation like this allows me to go on producing high-quality content on a subject that I'm passionate about, and there is a lot more to say.
Best wishes Robert J Dalby
excellent. more please...
So they accidentally created the worlds first aerospike engine that worked as an afterburner!
I just realized this is only a month old. God the times I've watched part one and wondered about part 2. I've never been more interested in pumps than i am right now.
Very good info Merci :)
What a pleasant surprise I got this morning seeing this video in my to watch. You do such a fantastic and throurough job in explaining how these machines worked...and yea, that sound of the turbopump spinning up does sound like a wild beast. I have zero doubt that creature in the clip was "voiced" by that V2 at White Sands. Also though, a similar sound is heard from the Titan II engines as the spin up for the Gemini fliights. Again, great video.
I don't even know what to say... Here in Africa 🌍 getting ro see a rocket is like a journey to Jupiter.. let alone understanding the physics and operation of one 😢. But i love it and the only one who is helping me is you. God bless you in abundance and please if i can chat you personally it will be a dream come true. Thank you and more blessings
Great video! Subscribed to your Patreon
The turbopomp screams: POWER! In a rather screechy voice..., kind of eerie too....
Greetings bibia.
Ps thanks for the uploads, I liked.
Very catchy explanation how this machine of "Hein" has worked. Best wishes from Frankfurt, 60km distance to Frankenthal.
Google the "Titan II screech"! It has to be my favourite spin up sound from the turbopumps at launch. It heralded the start of every Gemini mission 🚀
I hope this goes without saying, but I greatly appreciate your use of practical and understandable demonstrations to give insight to and explain complex phenomenon. While it's undoubtedly far more costly (both monetarily and in time) than throwing together a PowerPoint or write up, particularly for such a technical subject, your style of teaching/explanation is far more effective at both facilitating a 'true' understanding for the viewer while watching the video as well as (and possibly more importantly) retaining that understanding after watching the video.
If I was the Royal Institution I'd be begging you to give lecture(s) for their CZcams channel! This content deserves far more exposure than it receives in my opinion, thanks for the great video and keep up the fantastic work! c:
Hi there, you had me at Royal Institution! Thanks for watching, and please subscribe so you don't miss our next effort. KR RJD A&NTV
That was too good.
a 2 hour video essay on turbo pumps? yes, please
Thanks!
Hi Evan. Many thanks for supporting my work - I appreciate your contribution. Every donation like this allows me to go on producing high-quality content on a subject that I'm passionate about, and there is a lot more to say.
Best wishes Robert J Dalby
Another great video on the V2! I would love to see you do a video on the A4B version!
This kind of material would've been wonders to watch when I was a child. When I was a child in the 2000's, it seemed most technical stuff directed towards children was unsophisticated. Don't get me started on the NASA channel.
Your work in regards to the V2's details and the science behind it is a breath of fresh air!
P.S. Can you make a short of the turbopump sound? That alone gave me chills and a nervous laugh/cry.
Awesome video, though "schnellschluss" should be translated fast closure or even better "quick Closing". Schluss can also mean end or ending in General, but not in this case. Looking Forward to more V2 Videos.
"schnellschluss" means
emergency shutsdown
I really like your videos, I think unique in it's kind. Like all the modeling. A rocket always rotates around it's Center of gravity. Sometimes model rocketeers also do a swing test to see if a rocket is stable. They put a string in the center of gravity and swing it around and see if it flies forward.