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About the Author: livescience

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  1. ELI5 how this can be producing (what seems to be) incredible power while staying basically still. What is it attached to that is resisting the force of the propulsion?

  2. What material is the “tail pipe” or whatever it’s called made from it looks like it’s about to melt as the video ends

  3. On the Saturn V rockets used in the Apollo Program, the engines took the exhaust from the turbines that pumped the kerosine and liq. O₂ into the engines and funneled it around the outside of fuel/oxidizer mixture where it acted as an insulator, protecting the nozzles from overheating.

    [Here is a video of exactly what I’m talking about.](https://youtu.be/DKtVpvzUF1Y?list=PLCEDD9CA9826CA71F&t=120) It resulted in that characteristic dark shroud around the rockets’m thrust cones.

  4. Alright. I have a question for you science guys here. If i move fast enough through that flame, would it not hurt me? And if so, how fast would i have to be?

  5. As an actual retired rocket scientist from NASA/the shuttle, they gave a slight problem with their power head and possibly the Ethanol injector.

  6. Is there a significant loss in efficiency of the engine due to the unclean burn that happens towards the end of the GIF, presumably because of the tail pipe heating up? And if so, is there any practical way around it?

  7. With rocket engines with such high levels of thrust( like this one). How can one calculate how to properly secure it during tests? Furthermore , how would you know if you secured it properly prior to knowing how thrust will be given off by the engine?

  8. Videos in this thread: [Watch Playlist ▶](http://subtletv.com/_r7fxb6o?feature=playlist)

    VIDEO|COMMENT
    -|-
    [12kN engine static firing test for 80 seconds](http://www.youtube.com/watch?v=FsJ4Zm647n0)|[+440](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqf2x85?context=10#dqf2x85) – Source video This engine is Ethanol/LOX pressure-fed rocket engine. Thrust force is 12kN. The engine is a main engine for sounding rocket “MOMO” Here’s an article that talks about the rocket engine test, and the Japanese company behind it.
    [SpaceX Testing – Merlin Ablative](http://www.youtube.com/watch?v=JOHp0YMdfa0)|[+202](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqfd90u?context=10#dqfd90u) – Aww, you can’t hear the roar on that video. An engine test video without the roar is no engine test video at all But yeah, that’s still damn cool.
    [Cryogenic Rocket Engine Forms Icicles](http://www.youtube.com/watch?v=4eM1mNNdguA)|[+34](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqfmqgn?context=10#dqfmqgn) – In some engines, the exhaust nozzle is cold to the touch while the engine is at full thrust. And not just like, oh hey thats a bit chilly… Hundreds of degrees below zero. They can form icicles… while at full thrust.
    [Methane Rocket](http://www.youtube.com/watch?v=dumolLDfWw4)|[+19](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqfjtgy?context=10#dqfjtgy) – Another one with ear candy.
    [NASA Ames Tests Peregrine Hybrid Sounding Rocket Motor](http://www.youtube.com/watch?v=d8iOzQXyMA4)|[+15](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqfecr9?context=10#dqfecr9) – My favorite rocket ignition noise.
    [Apollo 11 Saturn V Launch Camera E-8](http://www.youtube.com/watch?v=DKtVpvzUF1Y&t=120s)|[+13](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqfdvdi?context=10#dqfdvdi) – On the Saturn V rockets used in the Apollo Program, the engines took the exhaust from the turbines that pumped the kerosine and liq. O₂ into the engines and funneled it around the outside of fuel/oxidizer mixture where it acted as an insulator, prote…
    [New Rocket Engine Burns Wax & Laughing Gas Video](http://www.youtube.com/watch?v=Y5YS5wkj5m4)|[+10](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqfofuc?context=10#dqfofuc) – My favorite
    [Rocket Engine Test](http://www.youtube.com/watch?v=UpE2CNB-0Dw)|[+10](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqf2ok5?context=10#dqf2ok5) – Source:
    [Mythbusters Adam Savage Confederate Rocket Sound](http://www.youtube.com/watch?v=9B7TnJ_eWTM)|[+5](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqfguet?context=10#dqfguet) – I am partial to this one
    [SLS RS-25 Engine Test, 25 July 2017](http://www.youtube.com/watch?v=KvjyQudk3cE)|[+1](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqflj1g?context=10#dqflj1g) – I just watched this: Is the white colour on the nozzle the metal freezing? Even with the engine on full?
    [The Purifier death scene from The Chronicles of Riddick.](http://www.youtube.com/watch?v=6VG9ZlEFDds)|[+1](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqfbuzd?context=10#dqfbuzd) – http://www.youtube.com/watch?v=6VG9ZlEFDds
    [Where’s the kaboom?](http://www.youtube.com/watch?v=z8rYotiiFP8)|[+1](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqfewe0?context=10#dqfewe0) – http://www.youtube.com/watch?v=z8rYotiiFP8
    (1) [Ares I Motor Test](http://www.youtube.com/watch?v=E3cPKgFKe0Y) (2) [Launch of Orion EFT-1 on Delta IV Heavy, The First Step to Mars](http://www.youtube.com/watch?v=u-iFUj7Jro4)|[+1](https://www.reddit.com/r/chemicalreactiongifs/comments/7fxb6o/_/dqfzz84?context=10#dqfzz84) – Ares I test – Delta IV Heavy launch – Apollo 11 Saturn V launch (slow motion) –
    I’m a bot working hard to help Redditors find related videos to watch. I’ll keep this updated as long as I can.
    ***
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