Rocket Engines Explained

[@MartianWolf]

Thanks for watching, and I hope you learned a thing or two about rocket engines! 🚀

[@JesusChrist-gc6mm]

Thank you!

[@papalegba6759]

i learned you don't understand any physics at all.

[@fromnorway643]

@@papalegba6759 That sentence would make more sense if you replaced the "you" with an "I".

[@papalegba6759]

@@fromnorway643

[@rv.9658]

Hi, what exactly is NASA'S Glenn Research Center?

[@summerlakephotog8239]

I most definitely want to learn about the raptor engine.

[@fieldadmiralspartanryseb-8293]

The Velociraptor burn looks so clean compared to any other rocket

[@timoheinz2879]

@Mo Thunder They are talking about SpaceX's Raptor Engine that powers their Starship

[@Earthinawarshell]

@@timoheinz2879 yes I want to learn how they make raptor engine

[@whimbur]

Everyday astronaut has an amazing video about it

[@RAJEEVSHARMA-gr3vb]

@@whimbur can u show us that bro

[@mikedavies5582]

This video was super good. It made me think of how teachers in high school and how they usually could play the the entire audience by explaining the fundamentals and then going on from there. Just being really aware of who is watching the video or who is the target audience. Well done.

[@dosomething3]

Derivation of conservation of momentum: Assuming: F=ma Given: F=0 Therefore: ma=0 Expanding a: a=(v2-v1)/(t2-t1) Plugging in expansion of a: m*(v2-v1)/(t2-t1)=0 Multiplying both sides by (t2-t1): m*(v2-v1)=0 mv2-mv1=0 mv2=mv1 Which is conservation of momentum.

[@StupeCheeze]

ok, I doubt anyone under 5th grade or something would understand this.

[@chadnigabyte]

This Guy Deserves More Sub And Views Such A Nice Guy And Content Also

[@MartianWolf]

Thank you! I'm happy to create these educational videos!

[@sergei_gruntovsky]

Finally, a new video!

[@MartianWolf]

More to come soon!

[@jamieoglethorpe]

We need an explanation of rocket engines at this level. Tim, the Everyday Astronaut, has excellent videos that dive deeper.

[@MartianWolf]

Tim’s videos are truly amazing! He goes into great detail and clearly explains a lot of the concepts

[@caesar7978]

Kinda feel like making my own homemade working model rocket...

[@AHMED-ly2ml]

Can't be too hard, I mean it's not rocket science.... Oh wait ..

[@ManojSaminda]

like your simplicity, so everybody can understand with great explanations.

[@pilotodehelicoptero4700]

Very goog explanation! Congrats from Brazil!

[@Markle2k]

Excellent explanation.

[@titan1286]

Second, you deserve more subscribers

[@MartianWolf]

Thank you! I'm just happy to share fun information about space and tech

[@titan1286]

OMG YOU REPLIED YOU ARE AMAZING AND I LOVE YOUR VIDEOS 👍👍👍👍👍👍❤️👍❤️👍❤️👍❤️👍❤️👍❤️👍❤️❤️

[@neerajsoni1310]

Amazing rocket science info

[@C_Broderson33]

This helped me understand engines a lot more, thanks!

[@AbdoZaInsert]

I don't have time to watch your video. But i just came to say: Keep up your awesome work, You're really one of a type in the making of space related videos.

[@cyclenut]

you took what I already knew, but made it much clearer. Thanks!

[@royalsaiyanelite198]

Comparing rocket thrust to standing made the most sense to me and I've been researching this all day

[@danielbaek960]

Hi! i love your videos!

[@MartianWolf]

I'm glad you like them!!

[@vibeduck4934]

helped me wrap my head around some of this thanks

[@hellinterestingproductions4710]

Does the shape of the rocket engine affect the thrust?

[@nerdofculture4385]

yes, the thinner the nozzle, the faster the fuel exhaust is gonna leave the engine.

[@SMHman666]

Hell....Prod...... You've probably already looked this up but yes, the size and shape of the combustion chamber, nozzle and the ratio of the throat all affect thrust.

[@PassportGaming]

Would love it if you streamed Starship hops and launches whenever they happen 🚀

[@MartianWolf]

I'll have to look into livestreams, I've never done one before. I know that a bunch of other KZbinrs have excellent coverage of the events as well! Like Everyday Astronaut, Lab Padre, I Need More Space, and others!

[@cuceofficial6777]

ur very underrated i gotta say your vids are very interesting and helpful so people can learn stuff about space rockets etc love the content keep up the good work man (btw sorry for my bad English its my third launguage)

[@suweno16]

He bacc guys

[@fatimaz1332]

The first time I've heard someone saying sir Isaac, the polite guy

[@risingmoon893]

0:02 SpaceX Raptor, 0:20 Rocketdyne Rs-25

[@gbengaomosola5577]

I love your class. Its educating. Will love to be part of subsequent classes

[@admindude2728]

Good video!

[@srideviroshayya2240]

Bro I learned a lot you explain really good

[@mimavsavasant2308]

thank you so much this video is really helpful

[@dilipgandhi7012]

It's a pretty cool video...and good knowledage on rockets tech.

[@whatever361]

Thank you so much it was so intersting

[@suyashpurwar8310]

Thank you! Please make more such videos

[@ninwithabin2683]

thanks very clear and easy to understand :)

[@sreyaharish4113]

Thankyou for your effort 😀

[@davenitro31]

very informative thank you!

[@limabravo6065]

If high school students don't know anything about newton's 3rd law then that's a problem

[@stuartgray5877]

When I graduated High school (84) PASSING Physics was MANDATORY for Graduation. NOW we are lucky if kids can read at a 5th grade level.

[@danielvillarreal5180]

loved it, thank you.

[@martinkauko5742]

Physics is a masterpiece

[@markharkey3279]

Thank you for this video! You’re very knowledgeable and a great presenter. I’m now a subscriber.

[@worldkeyvideo9080]

I didn't understand how rocket nossels work until this video.

[@futuretechnology7679]

But how does a rocket propel in space, if space is a vacuum, there is no atmosphere, and no air. So, what does the thrust propelled against?

[@JackKowalewski]

The interior wall of the nozzle. That's same as in the atmosphere.

[@futuretechnology7679]

@@JackKowalewski Then where is all of the fuel stored? It is amazing that people actually think that Newtonian Physics would apply in Space. That makes no sense, and space travel using primitive rocket engine technology is a hoax.

[@autolab8538]

Helpful

[@shivaninarsina666]

Great work!!

[@Corruptedd]

Awesome video, i am here before 1M subs that will happen in 2 years ( i am here from 2024 and am named Ronald )

[@zaidahmed5464]

4:44 *the mass not the size well done video keep it up

[@MartianWolf]

Thanks for pointing that out!

[@manjirasaraekanayakaalphys9256]

Thank u very much sir.you are a talented teacher and so cute.good luck😊❤❤

[@bakapuramarketing8285]

Very good

[@SG-SilverGaming]

Nice one

[@creativityshow7566]

Good video

[@SsaturMoon]

ıts easy explaned and is very usefull

[@treygoodman9272]

Thanks you

[@a_dreamer8612]

hes back!

[@gamercool6164]

thanks bro

[@suyashpurwar8310]

Sir please make more detailed videos on chemical engines

[@Johnadams20760]

this was fantastic. i am wondering, as to how do you control rockets speed /vectors etc. direction /velocity in a vaccum to speed up , change direction slow down and land on the moon and such things. how does that work? i loved this video!

[@suyashpurwar8310]

A series on chemical engines would be too good. Include a bit of maths and aerodynamics as well if you find it necessary.

[@michaelmoore8744]

Is there any video of rockets actually firing in space? I understand the concept of the pressure effects on propulsion, but i actually have never witnessed rockets in space. In this day and age there should be no problem making video of that.

[@SMHman666]

M Moore There are many videos of that. The Saturn launches, Space X and ESA's launches all show rockets working in a vacuum. There are vids of cold gas thrusters also which orient the craft.

[@smarty9516]

Want a video on plasma powered thruster

[@arthurbridenstine225]

You are very lucid.

[@jamesharford9788]

The fun fact Martin Wolf mentions is about two concepts that are mathematically the same? What is the second concept?

[@scholarshiphub3273]

Thanks for this informative video I'll like to join online class conducted by you; if there's any

[@LincolnChamberlin]

There were several errors in this video 1a) 2:33 breaking Newton's 3rd law wouldn't mean that you would push on the ground harder than the ground push back, ex you push down on the ground with the 3 Newtons, but the ground pushes up on you with 7 Newtons 1b) 2:45 the forces will always be equal and opposite, even if not in equilibrium. Not being an equilibrium just means it will change over time 2a) 4:55 momentum will be conserved in any closed system, regardless of whether energy is dissipated 2b) 5:45 momentum is dissipated into the environment, not into energy. they're two different things keep them straight

[@MartianWolf]

Thank you for the comment, these are all correct. I will be more cautious with an explanation in the future

[@JP-mn5bs]

I think you should do some research on actual thrust in a vacuum. Math is great, but real experiments often produce different results.

[@stuartgray5877]

Sorry but REAL EXPERIMENTS have shown MILLIONS OF TIMES that rocket propulsion works BETTER in a vacuum than it does in atmosphere, JUST AS the Tsiolkovsky rocket equation predicts. the company I work for buys dozens of monopropellant thrusters a year from MOOG Corp. (google them). We test EVERY SINGLE ONE of them IN A VACUUM and verify they produce the thrust predicted by the Rocket equation. Now quit spreading lies like an imbecile.

[@kitcanyon658]

I agree. Thus, you should do your own experiments.

[@gabepaul3911]

2:04 That voice crack tho...

[@tyronbopape3739]

why would someone get bored when you get to the conservation of momentum that is where the video gets interesting

[@straaths]

Why do we combust/burn the fuel? We could just release the gas. I imagine combustion/burning gives us somehow more energy. But I would appreciate details. Details about 'explosion' vs 'burning' etc.. thank you

[@kitcanyon658]

It isn't just the mass that you expel out the nozzle that is wanted. It is the momentum, which is mass times the velocity of the mass. We get supersonic gas speeds by combusting the propellants at high temperature.

[@fromnorway643]

We could in principle store the gas at very high pressure and release it without burning it (a cold gas thruster), but that would require very strong and thus very heavy gas tanks, making the rocket much less efficient. Much better to store the gas as a cold liquid in thin-walled lightweight tanks and produce the high pressure when the gas is burned in the rocket engines' combustion chamber.

[@4_years_left]

So it has nothing to do with the exhaust fuel energy striking the top of the combustion chamber? It's all about the energy pushing out the back, creating an equal opposite force?

[@stuartgray5877]

- "It's all about the energy pushing out the back, creating an equal opposite force?" YES. because PUHING OUT THE MASS of the exhaust creates an "EQUAL AND OPPOSITE FORCE"! one object CANNOT push on another object WITHOUT FEELING THE SAME FORCE. Per Newtons LAWS a "Force" CANNOT OCCUR ALONE, they MUST OCCUR IN PAIRS! You DO know about Newtons LAWS right?

[@papalegba6759]

@@stuartgray5877 a rocket is one object, chatbot stu. and a gas expanding into a vacuum creates no force.

[@fromnorway643]

@@papalegba6759 Do you think the recoil of a gun works because the bullet pushes against the air in the barrel or outside it? No, a gun's recoil would be the same in vacuum, or maybe even slightly more since there wouldn't be any air in front of the bullet restricting its acceleration. Rocket engines do in fact work _better_ in a vacuum, something already noted by the Germans with their V2 rockets during WW2.

[@papalegba6759]

@@fromnorway643 a rocket is not a gun, crazy chatbot sockpuppet guy.

[@fromnorway643]

@@papalegba6759 So, ejecting up to several _tonnes_ of hot gases per second at 3-5 times the speed of a rifle bullet does not produce a recoil? Please explain that!

[@Wildwoodblog]

Excellent presentation. Is it scripted or off the cuff ??? No matter. I'm on board.

[@MartianWolf]

Thank you, I’m glad you enjoyed the video! And I have an outline that I construct ahead of filming, but not an actual script.

[@Ricobaca]

The video starts at 9:28

[@michaeldanmosley4169]

I have a question ❓ why is it evidently impossible for us to invent something that doesn't involve 🧨 Explosions 💥 😂

[@nighpaw4651]

I've never seen anyone saying the "every action has an equel and opposite reaction" in relation to karma

[@joseph-mariopelerin7028]

when i was a kid, every time i farthed, i was feeling propelled forward... i know, i should of become einstein...

[@ShakespeareanWannabe]

Newton's Third Law question - when we throw something (like a pen) why don't we get pushed backwards?

[@SMHman666]

Shakespear....because the mass of the pen is so small. Technically you do but it is not noticeable to us.

[@ShakespeareanWannabe]

@@SMHman666 Thank you! I had a student asking, so they'll be happy to know the answer.

[@stuartgray5877]

@@ShakespeareanWannabe Ask your student: If you were sitting, motionless, in the middle of a perfectly frictionless ice rink, could you GET OFF the ice with a fully loaded AK-47? HOW? Have them explain. Then ask, what if this experiment was done in a vacuum chamber? What happens then?

[@kingking-ic8ib]

👌

[@SuperCartoonist]

I'm only here looking for a Dr. Stone comment. Has anybody read chapter 200?

[@thilanthiwickramasinghe9587]

Ah so thats how life also work.When you push your past behind you,you move foward in life huh🤔🤔

[@dewiz9596]

Sit on a wheeled chair, throw medicine ball at wall. Chair, and you, go in opposite direction. Rocket explained.

[@norb3695]

Oh yea this is big brain time

[@anishaditya4400]

Umm,is it the size or the mass...

[@SMHman666]

anish.....It's the mass of an object. You can have a huge sized object but with little mass.

[@Oktheorignal]

Momentum is not dependent on the "size"... It's dependant on the mass of the object! If the water bottle weighed 5 tons then the truck wouldn't stand a chance!!

[@fromnorway643]

Momentum depends on both mass and _speed._ That's why a space shuttle main engine (RS-25) produces about 10-15 times more thrust than a typical turbofan engine ejecting the same amount of gas per second (~500 kg/sec).

[@Whytho2000]

Where do the forces/thrust act in rockets? If I were floating in space and threw a tennis ball like an engine throwing exhaust, the ball and I would fly apart. The ball I threw would impart forces to me THROUGH my HAND and vise virsa. But because my hand is throwing only a tennis ball, the forces are easily transferred and my hand wouldn't be crushed. The question I'm left with is, if a rocket engine can generate millions of lbs of thrust, how does that delicate rocket nozzle handle millions of lbs of force? Are the forces just acting on the combustion plate? Is the entire rocket mounted to that extremely complex piece of tubes? Where do the forces act?!

[@stuartgray5877]

The "Throat" of the rocket nozzle is VERY STRONG and can support multiple time the weight of the rocket above it. The Nozzle is also a LOT stronger than you think. We think they look flimsy but not when "inflated" with 3000 PSI of gas pressure.

[@Whytho2000]

@@stuartgray5877 Thank you, wish I could see a section view, and could see where the forces are in the rocket. Its just so mind blowing.

[@felreymiguel5734]

Hello :)

[@Illuminati_HD]

Good Video, but for a Rocket channel wayyyyyy too basic. I am not a physiks guy and even i knew literraly everything. You should explain these things either in more detail or not . cause what you told in the video is completly self explanatory.

[@MartianWolf]

I’m glad you thought it was a good video! My goal with this was to keep it very simple, so that when I explain other rocket engines in the future, I don’t need to give as much background.

[@Т1000-м1и]

Nobody explains anything these days. Just wikipedia copy paste

[@samsmith3313]

Dude this is elementary for my brain Can you make a more in depth video

[@angryyoungman66]

dislikes are from flat Earthers

[@BasicProcrastination]

Cute haircut

[@nicholasmartinez8767]

He kinda looks like drake bell

[@samojolbo7907]

Love ur video but this isnt cllege fiziks more like midle school first year.

[@onyokanacleto7235]

A

[@unclebimgoldfinch5134]

So your a rocket scientist. That don’t impress me much

[@nerdofculture4385]

it's not meant to impress you lol

[@kitcanyon658]

The word you were looking for is “you’re”.

[@SMHman666]

unclebim But wait, I'm Elvis too and I have a car!

[@MScienceCat2851]

This is the most average explanation you can find on internet, and its not even explanation.

[@fritzlouisewagas3941]

please go straight to the point