I'm just at the beginning, but Tim, brother you have really taken your love for rockets (all of it) and come SO FAR!! You have assembled the highest production quality team of genius people and so much talent on your team Tim, wow. You're SUCH a GREAT filmmaker!! You really deserve whatever fame and glory you have gotten and will continue to get. I'm amazed every video you create for us all to enjoy free. Thank you SO much for the hard work, all the sleepless nights, the long hours, just to share your experiences and learned knowledge with us on TH-cam. You're one of a kind Tim.
Can all this information be found on the internet? Or do you need to have a SPECIAL team with VERY INTELLIGENT people to make a video or learn something like this?
I'm waiter. The fact that I sort of understand the engineering behind rocket engines because of the work you do is kind of insane. This is some of the best educational content out there. Beautifully explained and produced. You are a legend, my friend. Keep up the good work
"... understand the engineering behind rocket engines ". Do you?!!. I never understood how this guy can talk for an hour without actually saying nothing! Is he an engineer?
Like many of you, I’ve already watched the 2 videos recommended. The “Everyday Astronaut” deserves a flight to the moon and back home safely. I’ve learned so much from this channel.
Video gold watching him all excited he is going to be on a Starship as it's in the process of failing getting into orbit. But his wife is having to bring him back to reality to show him all is not good 😂
I think we can safely say this is one of the most anticipated videos that everyone wants to watch. Thanks for all the effort you and the team put into it! 😊
Me, an hour ago: "Yeah, rocket engineering is complex, I know." Me, after watching this: "Holy cow, how did they ever manage to NOT blow up every single space shuttle on the pad?" Great, informative content, Tim! Thanks for this.
Yeah, it does make it even more amazing that the V2 rocket managed to be pretty successful 80 years ago. I guess the hydrogen peroxide powered pump made things much simpler, if less efficient. The fuel wasn't cryogenic but did they precondition the liquid oxygen pump? Was it just built strong (& heavy) enough to withstand pressure surges at startup?
@@Loanshark753 Rocket Lab circumvented about HALF of the complexities by going with battery powered electric motors to run the fuel and oxidizer pumps vice using the propellants themselves which is literally an almost one hundred year old 1930's approach. I cannot see why there could not be a combination of the two, use electric motors to get the pumps running and the engine started THEN chuck the motors and batteries on the way up to save weight and let the pumps run from turbines like "normal" by burning internal fuel and oxygen to spin turbines, BEST OF BOTH WORLDS. It would eliminate a LOT of hardware. And hopefully at some point in the future batteries will be sufficiently robust to run the pumps with electric motors ALL the time.
@@michaelschnittker7388 Except when you get to the part about chucking, it fails, and crashes into your rocket destroying your lower stage. I think we should just put a little wind turbine under the rocket and have it spin with the propulsion. No way that could go wrong.
I CANNOT believe this is free. Thank you Tim for everything you do. This is incredible and an entire generation is learning about space travel because of you. 🙏
I've been watching this channel since you were just live streaming Spacex launches from your house. To see how far you've come in such a short amount of time is quite incredible. I've learned so much in the years I've watched. Hard work surely pays off, keep it going friend.
Incredible video as always, Tim. The graphics used here are second to none, and your dedication to communicating the science of spaceflight to the general public is absolutely amazing. Keep it up!
Icing on the cake: Clips from Tim's earlier interviews with actual space entrepreneurs, and not just Elon Musk, which was in itself a huge journalistic score.
This was exceptional Tim, thank you. I’ve been interested in these topics since I was a 6 year old boy (that adds up to a big number now) and you answered SO many questions with this it was hard to keep up with all of them. I hope you become convinced that you're the best at this. Andy freakin' Lapsa thinks so. Good enough for me.
Tim, I feel like I finely understand rocket engine power. I have been fascinated since I was a kid in the early 60's but no matter what I read, I had never really been inside a rocket engine, until now. Thank you for doing your homework and explaining it so well. Your interviews and deep-dives with rocketeers are gritty and enlightening. Also, I appreciate all the work you did to put this video together.
As an amateur rocketeer who has been attempting to make a funtional liquid fueled model rocket for 3 years now, this video is invaluable to me. Thank you so much Tim, the work you do to make this information more accessible is amazing. Keep it up. PS: I can't wait to join you in losing our minds over the first full stack Starship launch, I'll be watching live even if I have to take an extra break at work.
LEARN HOW TO SPELL FUNCTIONAL CORRECTLY FIRST.. NORMALLY IM NOT A GRAMMAR NAZI BUT IN TERMS OF ROCKET ENGINEERING WE CANT AFFORD TO BE MAKING THESE KINDS OF MISTAKES.. ITS LITERALLY THE DIFFERENCE BETWEEN SUCCESS AND FAILURE..
@@party4keeps28 oh, it's still inoperable. I've kinda pushed it to the back burner for now. I need some equipment which I can't easily acquire. Oddly enough, storing cryogenic fuel seems to be the hardest part. In the mean time I've just been developing various solid rocket propellants. I also tried my hand at a pulse jet engine but my welding skills need some work.
This is an awesome video, great job!! I'm a propulsion fluid dynamics expert at NASA, and I learned a bunch from this! Some of the folks I work with are involved with RS-25 startup, and it's really cool to see their work showcased so publicly like this. Also, I'd love to see a video on engine throttling!! You could go through solid rocket grain shape, in-space thruster pulsing and impulse bits, and of course the wild world of launch vehicle engine throttling and deep throttling. Great topic to add to your growing collection of incredibly informative rocket propulsion videos.
I will never get tired of watching RS-25's spin up in slo-mo and seeing the engine bells resonating like literal bells in sympathy with the initial shockwave when the engine transitions from pre-burner to full flow. Then watching the boundary layer spread out across the nozzle wall as combustion stabilises. So impressive, I love it every time.
Excellent work, once again! Thank you, I learned a lot! One last thing, as a retired professional aerospace engineer, I am super-impressed with your deep dives. Takes real effort to absorb all of this material and you have real talent!
Tim, this is easily one of the best videos you’ve published to date. You truly captures that feeling I used to get watching the discovery channel when learning something new and fascinating! Thank you for all you and your team’s hard work in creating these deep dives!
You must be extremely old! Do you remember that other channel called "history"..? I'm just joking, but honestly TH-cam has gone from low quality sub 10min "nonsense". to having the best, incredibly in-depth, educational "content" that exists today. In literally every subject / niche. ( Some Premium & Paid subscriptions are okay, but) TV entertainment models. high cost production, decompressed , fluffed or dragged out & interrupted delivery. Low information destiny, or low/no amount of educational information, either to fundamentally or completely understand. & actually learn anything at all. In a limited frame. Tim is probably the most influential or best of educational, space/rocket, creators! I'm so happy he won dear moon contest! He has continually improved & multiplied content quality so consistently. I say he can't get any better yet he does!
One of the best? I dunno. Top 100 surely. Nearly every explainer Tim does, is simply awesome at taking twisty complex stuff and making it clear, often simple. I know what you meant though. Hard to select the right superlative when every effort vastly exceeds expectations.
@@steveschritz1823 following this, we get a great doofenschmirtz flashback-type backstory where he talks about his uncle, Werner von Braun, who was too busy with his rockets to ever attend one of his birthdays
Wow! Knocked it out of the park as usual! 'Appreciation' is the word. I had no idea, and Tim, you're absolutely right. Developing a rocket engine design to the point where it can be reliably fired up is a very impressive feat. I did not appreciate this previously. Thank you 😊
Tim, nice job as usual! Very informative and presented in a way that is easy to follow. You truly are the Everyday Astronaut bringing space down to earth for everyday people.
10:40 - kills boiler pumps all the time. The bubles exploding cause little shock waves that are as fast as the speed of sound in some cases... so its like tiny little TNT's blowing up along the blades constantly.
Videos like this are why I donate to this channel. It’s inspiring, fascinating and I feel the collective passion of everyone involved in making these videos. Never stop inspiring 💪
It's truely impressive how much information you packed into one video while also explaining it that well. You make it so very easy - relative to the complex nature of the topic - to understand. Thank you!
Simply brilliant. I have to stay I'm not a fan of regular Everyday Astronaut content (nothing wrong with it, just too much bubbly excitement for my tastes), but these longer in-depth lectures / documentaries are truly excellent. It's not afraid of going into technical details, but it also doesn't lose the trees for the forrest. And, to top it all off, it's (as far as I can tell) entirely correct with only the most minor inaccuracies in using technical term.
Great job as always Tim! This video is one of the most knowledge-packed pieces of content I've ever seen, and quite frankly blows even your other deep dives out of the water. I couldn't have said it better: it really does give you an appreciation for all the hard work that goes Ito engine development. I think anyone who regularly complains about how long it is taking to develop an engine really should use this as a reminder of just how ridiculously difficult solving every single minute problem during startup really is. This one was truly worth the wait.
Jaw dropping. I've watched this 3 times and it's still complicated. I'm going to keep watching until it sinks in properly, thankfully easily done when it's so amazingly well presented! Thank you!
This is your best video yet. You really set up a strong base with the previous engine videos and the factory tours, and this took all the prior knowledge to a whole new level. Little details like torch igniters, valves and bypasses, purges, and how the engine modulates valves to deal with transients were so informative and almost all new information to me, even though I'd say I have a pretty good armchair knowledge of rocketry. Fantastic work.
One of the top 10 science communicators in the WORLD. I would say top 5 but i have to give respect to the OGs. This is how advanced learning should be. The real time graphs. The repeated definitions after a mention of a particularly complicated subject. Real time examples from sourced videos! Jeez i can't praise you enough for keeping my ADD brain locked in to litteral ROCKET SCIENCE 😂 i love it. ❤️
As a programmer, it sounds like rocket engines are like multi-threaded applications where each word could lead to a explosion instead of error messages. Insane and really well done lol
Amazing work, Tim, Caspar, & team! I'm a space nerd, and I watched the previous videos and Scott Manley's video on rs25 startup. I even heard them testing rs25 engines at stennis and visited a test stand when I lived in Mississippi in the 80s (not that that would teach me how it works)... A lot of this went over my head. I'll have to watch it a few more times to fully understand it all. Thank you for all this work!
Thanks so much Tim! Again, you've created a college level overview and put it out there for the general public, at no real cost to us. Amazing, simply amazing. I've only viewed up to the "Starting a Rocket Engine in Space" segment so far, but the explanations along with diagrams and video are all adequate for the non-rocket scientists like me to "Get it", or at least, get most of it. Thanks to your team as well for putting everything together! Elon sure should offer you a job! I think back on those videos where you and he were having discussions, and you both were doing "Real time" design on the fly, that was so cool!
Yet this is still just an overview, imaging the maths and material flow science to make even a single valve work at these temperatures and pressures to operate reliably with this sort of precision and variable flow rates. No wonder it is said rocket science is hard.
Tim, what you have created does benefit all of humanity immensly. Everyone can bite as much as they can, but overall we all win. Thank you for everything you have done. This is a truly excellent episode. For older folks, just imagine how many libraries you'd have to visit to get 10% of this episode in 80's or so.
OMFG! 200k views in just 2 days on a DEEPLY geeky topic? Tim, you totally rock as a tech explainer! Separately, it is very impressive that there are that many people on earth who want to watch this. A measure of someone really understanding something, is the ease with which they explain it in relatively simple words. Bravo!
Wow, you lay down a *_LOT_* of information on a complex subject and you don't _skimp..._ I have *_loved__ it every time you have done a _deep dive_ because they're wonderfully informative. Your interviews with *Elon* were *_epic_* too. Thank you!
WOW I've literally watched every episode that Tim has referred to as examples, what a dream this guy is living everyday, great job TIM, it's no wonder you don't work at spaceX and NASA at the same time..I myself and my 6 year old son feel like rocket scientist from watching so much of Tim's content..my son AXEL would like to congratulate you on your success and expansive knowledge, maybe some day we could have the honor of watching a launch along side you his hero.. great work 😁
Your content is so high quality and so worth having online for people's learning pleasure. And I can tell that the propellant for your ambition is the best fuel type of all: Passion. May I dare say, sir, you've found your ikigai.
So great! Thanks for the excellent video. One nit picky comment: at 33:30 you say that there is no acceleration for the rocket in "space" when in fact the rocket (an everything inside) is accelerating toward the Earth. Orbits are constantly accelerating motion. You mention inertial reference frames which which brings up quite a complicated set of ideas for objects in orbit when one considers special and general relativity. I think you know all of this and did a good job of just keeping the video going without sidetracking into the Physics of orbits. :)
Hey Tim, awesome video! For the RS-25 start sequence, at 50:25 CCV sits on the bypass leg, so as it ramps down and closes, it forces more hydrogen down the feedlines and through the nozzle coolant tubes
Holly cow, this is shocking informative! You had done an excellent work on the previous two engine introduction videos, but this is a whole new level of information. I can’t believe you even made animation along with graphs that breakdown every section of the engine bootstrapping…. It is mind blowing Thanks for the amazing work, Tim, excellent job , as always!
Thanks, for this video, what a great explanation to help people at many different levels of comprehension understand the the process and procedure of how the rocket engine works. !!!!!!!!
A minor quibble: The igniter on an SRB isn't any more an explosive than the SRB propellant itself. It's more like a smaller solid rocket lights a bigger solid rocket that lights the primary fuel grain of the SRB. An actual explosive wouldn't produce enough heat for long enough to bring the HTPB of the fuel grain to decomposition temperature (which is necessary to get the fuel to light). You'd also probably blow the top of the SRB off if it was an actual explosive because it would produce too much pressure too quickly. Really the only explosive in the ignition system is the small detonator that lights the first motor - which has its own slower booster charge to ensure that it doesn't blow to pieces. Rockets are already riding the fine line between combustion and explosion, they don't need anything in there to tip them over the edge.
Fantastic video. Answered many questions but particularly the one I had about relighting the second stage while in orbit. You make complicated procedures easy to understand. Thanks to you and all your experts.
This is my second time watching this and man, I forgot how much fun this is to watch. I will most likely retain very little of this information but going through all these extraordinarily complicated processes is a really engaging and fun way to spend my time. Your brain is a muscle and if you're gonna use it, you might as well have some fun in the process. Thanks Tim.
This is an incredible explanation of starting a rocket engine. As a former jet engine mechanic, I am able to follow this a little bit. My mind keeps going back to the operation of a jet engine and the similarities of the two at the same time knowing that a rocket engine is a different beast.
I wish there were something like this for all aspects of engineering. The Knowledge that Tim brings to rocket science is astronomical and I can’t get enough of it. Thank you, Sir for your time and expertise in teaching use just a little of rocket science
Holy Cow! Who knew? Fantastic primer Tim. Really thought provoking , especially because we take it all for granted. They light up and they shut down. For most people it is that simple and not worth further analysis. Outstanding and thanks!
Bravo! Honestly, this is one the best videos I've ever seen on ANY technical subject. My 86 year old dad is a retired rocket scientist (propellant engineer), and I've been a rocket nerd ever since I was a little twerp. I say it's one of the best videos I've ever seen, because I found myself actually feeling nervous and tense during each "play-by-play" of interrelated variables and processes during the sequence. This edge of my seat feeling happened repeatedly, because start-up is a balancing act on the edge of catastrophe. Sure, I've seen some free-climbing videos (no ropes) that gave me the willies even worse... but dat not rocket science. A tour de force of exposition 👍🏻👍🏻👍🏻
Amazing video, just great as always. It's so cool to see how you've really become a reference in what I would call space journalism. You now have all these incredible deep interviews with these companies' CEO explaining their work, and you perfectly use them in this video to explain different topics. Great work
All of this in less than an hour is definitely not a long video.
I'm honestly impressed you were able to cram this much into an hour!
Each peace could easily be 30 minute video and a month long series..
@@Scott_C or even a college class
@@loganhumphries4851 nah, a lot of theory is missing for university and even the step before
Super impressive isn't jt
Wait, that was an hour!? Woof
I'm just at the beginning, but Tim, brother you have really taken your love for rockets (all of it) and come SO FAR!! You have assembled the highest production quality team of genius people and so much talent on your team Tim, wow. You're SUCH a GREAT filmmaker!! You really deserve whatever fame and glory you have gotten and will continue to get. I'm amazed every video you create for us all to enjoy free. Thank you SO much for the hard work, all the sleepless nights, the long hours, just to share your experiences and learned knowledge with us on TH-cam. You're one of a kind Tim.
Thank you so much for the kind words. I appreciate it immensely! I'm glad the passion shows 🖤
he deserves to go in space for free.
This comment sums up exactly how I feel while I’m left to delve into my newly found passion for rocket engines. Thank you
Can all this information be found on the internet? Or do you need to have a SPECIAL team with VERY INTELLIGENT people to make a video or learn something like this?
Gaaaayyyyy
I'm waiter. The fact that I sort of understand the engineering behind rocket engines because of the work you do is kind of insane. This is some of the best educational content out there. Beautifully explained and produced. You are a legend, my friend. Keep up the good work
🎉❤😢
"... understand the engineering behind rocket engines ". Do you?!!. I never understood how this guy can talk for an hour without actually saying nothing! Is he an engineer?
Hi Waiter, i'm Bryce
Like many of you, I’ve already watched the 2 videos recommended. The “Everyday Astronaut” deserves a flight to the moon and back home safely. I’ve learned so much from this channel.
Video gold watching him all excited he is going to be on a Starship as it's in the process of failing getting into orbit. But his wife is having to bring him back to reality to show him all is not good 😂
I think we can safely say this is one of the most anticipated videos that everyone wants to watch. Thanks for all the effort you and the team put into it! 😊
I showed my dad and he said he doesn't care 😔
I second this!
@@LQB42 when I said everyone I meant of his subscribers, your dad doesn’t need to care everyone has their own interests🙃
@@mixsmasher he doesn't talk to me about things I like he only wants to talk about family
I just start watching and I'm super curious if we will finally know how does Raptor 2 start.... For now it is mystery.
Me, an hour ago: "Yeah, rocket engineering is complex, I know."
Me, after watching this: "Holy cow, how did they ever manage to NOT blow up every single space shuttle on the pad?"
Great, informative content, Tim! Thanks for this.
Love your channel! happy to see you here.
Maybe Rocket lab chose electric fuel pumps to reduce engineering challenges.
Yeah, it does make it even more amazing that the V2 rocket managed to be pretty successful 80 years ago. I guess the hydrogen peroxide powered pump made things much simpler, if less efficient. The fuel wasn't cryogenic but did they precondition the liquid oxygen pump? Was it just built strong (& heavy) enough to withstand pressure surges at startup?
@@Loanshark753 Rocket Lab circumvented about HALF of the complexities by going with battery powered electric motors to run the fuel and oxidizer pumps vice using the propellants themselves which is literally an almost one hundred year old 1930's approach. I cannot see why there could not be a combination of the two, use electric motors to get the pumps running and the engine started THEN chuck the motors and batteries on the way up to save weight and let the pumps run from turbines like "normal" by burning internal fuel and oxygen to spin turbines, BEST OF BOTH WORLDS. It would eliminate a LOT of hardware. And hopefully at some point in the future batteries will be sufficiently robust to run the pumps with electric motors ALL the time.
@@michaelschnittker7388 Except when you get to the part about chucking, it fails, and crashes into your rocket destroying your lower stage. I think we should just put a little wind turbine under the rocket and have it spin with the propulsion. No way that could go wrong.
I CANNOT believe this is free. Thank you Tim for everything you do. This is incredible and an entire generation is learning about space travel because of you. 🙏
There's nothing 'free' about the ad-revenue e-commerce model. You are the product, my friend. Awesome content though, Tim.
@@BravoNineThreeTwo whats an ad
Sponsored by Apple watch
Coming to you by whatever ad I didn't see using premium.
not free bud
I've been watching this channel since you were just live streaming Spacex launches from your house. To see how far you've come in such a short amount of time is quite incredible. I've learned so much in the years I've watched. Hard work surely pays off, keep it going friend.
Incredible video as always, Tim. The graphics used here are second to none, and your dedication to communicating the science of spaceflight to the general public is absolutely amazing. Keep it up!
Icing on the cake: Clips from Tim's earlier interviews with actual space entrepreneurs, and not just Elon Musk, which was in itself a huge journalistic score.
This was exceptional Tim, thank you. I’ve been interested in these topics since I was a 6 year old boy (that adds up to a big number now) and you answered SO many questions with this it was hard to keep up with all of them. I hope you become convinced that you're the best at this. Andy freakin' Lapsa thinks so. Good enough for me.
Thank you so much!
Your channel iterations since 2018 are beyond admirable, Tim. This takes the space biscuit. Well done mate.
Another fantastic video. Thanks!
Tim, I feel like I finely understand rocket engine power. I have been fascinated since I was a kid in the early 60's but no matter what I read, I had never really been inside a rocket engine, until now. Thank you for doing your homework and explaining it so well. Your interviews and deep-dives with rocketeers are gritty and enlightening. Also, I appreciate all the work you did to put this video together.
This excellent content is why you are on the Dear Moon team! Thanks for doing this!
It's so rewarding to see you able to draw from your years of dedication to get the _perfect_ examples to use as B-roll/explanation shots. Great work.
As an amateur rocketeer who has been attempting to make a funtional liquid fueled model rocket for 3 years now, this video is invaluable to me. Thank you so much Tim, the work you do to make this information more accessible is amazing. Keep it up.
PS: I can't wait to join you in losing our minds over the first full stack Starship launch, I'll be watching live even if I have to take an extra break at work.
LEARN HOW TO SPELL FUNCTIONAL CORRECTLY FIRST.. NORMALLY IM NOT A GRAMMAR NAZI BUT IN TERMS OF ROCKET ENGINEERING WE CANT AFFORD TO BE MAKING THESE KINDS OF MISTAKES.. ITS LITERALLY THE DIFFERENCE BETWEEN SUCCESS AND FAILURE..
Who else is reading this comment after the 4th Starship Launch. Man was it a good one too.
@@JB-dv7ewJust saw the chopstick catch!
Update? How's that engine coming along?
@@party4keeps28 oh, it's still inoperable. I've kinda pushed it to the back burner for now. I need some equipment which I can't easily acquire. Oddly enough, storing cryogenic fuel seems to be the hardest part. In the mean time I've just been developing various solid rocket propellants. I also tried my hand at a pulse jet engine but my welding skills need some work.
This is why we wait so long. Thanks for the incredible quality Tim! 🚀
This is an awesome video, great job!! I'm a propulsion fluid dynamics expert at NASA, and I learned a bunch from this! Some of the folks I work with are involved with RS-25 startup, and it's really cool to see their work showcased so publicly like this.
Also, I'd love to see a video on engine throttling!! You could go through solid rocket grain shape, in-space thruster pulsing and impulse bits, and of course the wild world of launch vehicle engine throttling and deep throttling. Great topic to add to your growing collection of incredibly informative rocket propulsion videos.
Transients suck. So lets put a transient inducer into the sucker!
ER-42 at Marshall?
Easily one of the best space engineering channels on TH-cam ever. Keep up the great work Tim!
I will never get tired of watching RS-25's spin up in slo-mo and seeing the engine bells resonating like literal bells in sympathy with the initial shockwave when the engine transitions from pre-burner to full flow. Then watching the boundary layer spread out across the nozzle wall as combustion stabilises. So impressive, I love it every time.
Excellent work, once again! Thank you, I learned a lot!
One last thing, as a retired professional aerospace engineer, I am super-impressed with your deep dives. Takes real effort to absorb all of this material and you have real talent!
Thank you for sharing some of the beauty of human ingenuity! As always, your work is some of the greatest educational content I've ever seen!
Tim, this is easily one of the best videos you’ve published to date. You truly captures that feeling I used to get watching the discovery channel when learning something new and fascinating! Thank you for all you and your team’s hard work in creating these deep dives!
You must be extremely old! Do you remember that other channel called "history"..? I'm just joking, but honestly TH-cam has gone from low quality sub 10min "nonsense". to having the best, incredibly in-depth, educational "content" that exists today. In literally every subject / niche. ( Some Premium & Paid subscriptions are okay, but) TV entertainment models. high cost production, decompressed , fluffed or dragged out & interrupted delivery. Low information destiny, or low/no amount of educational information, either to fundamentally or completely understand. & actually learn anything at all. In a limited frame.
Tim is probably the most influential or best of educational, space/rocket, creators! I'm so happy he won dear moon contest! He has continually improved & multiplied content quality so consistently. I say he can't get any better yet he does!
One of the best?
I dunno.
Top 100 surely.
Nearly every explainer Tim does, is simply awesome at taking twisty complex stuff and making it clear, often simple.
I know what you meant though.
Hard to select the right superlative when every effort vastly exceeds expectations.
This is a very impressively structured and researched video. Amazing work, Tim.
„Ferb, I know what we‘re gonna do today“
What's that Phineas?
Underrated comment
You are so busted!
Where's Perry?
@@steveschritz1823 following this, we get a great doofenschmirtz flashback-type backstory where he talks about his uncle, Werner von Braun, who was too busy with his rockets to ever attend one of his birthdays
Wow! Knocked it out of the park as usual! 'Appreciation' is the word. I had no idea, and Tim, you're absolutely right. Developing a rocket engine design to the point where it can be reliably fired up is a very impressive feat. I did not appreciate this previously. Thank you 😊
So many questions answered! Awesome video Tim! I'm glad I was finally able to watch this
Thanks for the HUGE amount of effort on this video! You and your team are producing very high quality content and I can’t thank you enough!
Absolutely superb video. I was glued to my seat the entire time as I literally knew zero going into this…. Amazing work from all involved. thank you.
Super high quality presentation! Thanks so much. This seems about as deep as you can go without losing half the audience along the way. Amazing job
Fantastic content Tim - huge congrats to you and the team responsible for making this happen. Fascinating stuff.
Thanks!
Tim, nice job as usual! Very informative and presented in a way that is easy to follow. You truly are the Everyday Astronaut bringing space down to earth for everyday people.
As usual.. very well done! What a tremendous gift you are providing for kids of all ages wanting to learn.
Awesome video, Tim. I'm fascinated with rocket engines and this was, while complicated, probably the best explanation I've ever heard.
10:40 - kills boiler pumps all the time. The bubles exploding cause little shock waves that are as fast as the speed of sound in some cases... so its like tiny little TNT's blowing up along the blades constantly.
What a superb presentation of this complex issue. From storytelling to infographics to anything else, I'm impressed! Thank you very much.
Videos like this are why I donate to this channel. It’s inspiring, fascinating and I feel the collective passion of everyone involved in making these videos. Never stop inspiring 💪
You mean you actually pay for this crap? It's all been done before decades ago. Read some books.
It's truely impressive how much information you packed into one video while also explaining it that well. You make it so very easy - relative to the complex nature of the topic - to understand. Thank you!
Great video. Your explanations are right on target for an audience motivated to learn.
Tim, how in the world you managed to the the pressure, speed, temperature graphs on the engine? Magnificent! This video is gold!
Not as difficult as starting my lawnmower.
You have cooling problems on that too do you?
That’s why I trashed my gasoline lawnmower…. Electric for everything possible
That’s funny
Dudeeeeeeeeee
😂😂😂
Seriously insane quality man, im just commenting for that great details
That RS-25 start up is insane!
Simply brilliant. I have to stay I'm not a fan of regular Everyday Astronaut content (nothing wrong with it, just too much bubbly excitement for my tastes), but these longer in-depth lectures / documentaries are truly excellent. It's not afraid of going into technical details, but it also doesn't lose the trees for the forrest. And, to top it all off, it's (as far as I can tell) entirely correct with only the most minor inaccuracies in using technical term.
Great job as always Tim! This video is one of the most knowledge-packed pieces of content I've ever seen, and quite frankly blows even your other deep dives out of the water. I couldn't have said it better: it really does give you an appreciation for all the hard work that goes Ito engine development. I think anyone who regularly complains about how long it is taking to develop an engine really should use this as a reminder of just how ridiculously difficult solving every single minute problem during startup really is. This one was truly worth the wait.
Jaw dropping. I've watched this 3 times and it's still complicated. I'm going to keep watching until it sinks in properly, thankfully easily done when it's so amazingly well presented! Thank you!
Fantastic video!!🎉 amazing graphics demonstrating the startups. Very grateful for all the work you and your team put it. Thank you Tim🙏
@EverydayAstronaute Now that was an extremely interesting show on engine’s&process method. Thanks bud. Appreciate the effort &Hardwork. Gained a lot.
This is your best video yet. You really set up a strong base with the previous engine videos and the factory tours, and this took all the prior knowledge to a whole new level. Little details like torch igniters, valves and bypasses, purges, and how the engine modulates valves to deal with transients were so informative and almost all new information to me, even though I'd say I have a pretty good armchair knowledge of rocketry. Fantastic work.
One of the top 10 science communicators in the WORLD. I would say top 5 but i have to give respect to the OGs. This is how advanced learning should be. The real time graphs. The repeated definitions after a mention of a particularly complicated subject. Real time examples from sourced videos! Jeez i can't praise you enough for keeping my ADD brain locked in to litteral ROCKET SCIENCE 😂 i love it. ❤️
As a programmer, it sounds like rocket engines are like multi-threaded applications where each word could lead to a explosion instead of error messages. Insane and really well done lol
Amazing work, Tim, Caspar, & team! I'm a space nerd, and I watched the previous videos and Scott Manley's video on rs25 startup. I even heard them testing rs25 engines at stennis and visited a test stand when I lived in Mississippi in the 80s (not that that would teach me how it works)... A lot of this went over my head. I'll have to watch it a few more times to fully understand it all. Thank you for all this work!
Thanks so much Tim! Again, you've created a college level overview and put it out there for the general public, at no real cost to us. Amazing, simply amazing. I've only viewed up to the "Starting a Rocket Engine in Space" segment so far, but the explanations along with diagrams and video are all adequate for the non-rocket scientists like me to "Get it", or at least, get most of it. Thanks to your team as well for putting everything together! Elon sure should offer you a job! I think back on those videos where you and he were having discussions, and you both were doing "Real time" design on the fly, that was so cool!
Yet this is still just an overview, imaging the maths and material flow science to make even a single valve work at these temperatures and pressures to operate reliably with this sort of precision and variable flow rates. No wonder it is said rocket science is hard.
Tim, what you have created does benefit all of humanity immensly. Everyone can bite as much as they can, but overall we all win. Thank you for everything you have done. This is a truly excellent episode. For older folks, just imagine how many libraries you'd have to visit to get 10% of this episode in 80's or so.
That over pressure start up that blew out the pumps and the side of the chamber was insane looking. Very similar to a volcanic release.
OMFG! 200k views in just 2 days on a DEEPLY geeky topic?
Tim, you totally rock as a tech explainer!
Separately, it is very impressive that there are that many people on earth who want to watch this.
A measure of someone really understanding something, is the ease with which they explain it in relatively simple words.
Bravo!
Wow, you lay down a *_LOT_* of information on a complex subject and you don't _skimp..._
I have *_loved__ it every time you have done a _deep dive_ because they're wonderfully informative.
Your interviews with *Elon* were *_epic_* too.
Thank you!
Love, love, love! You answered questions that have puzzled me for years.
WOW I've literally watched every episode that Tim has referred to as examples, what a dream this guy is living everyday, great job TIM, it's no wonder you don't work at spaceX and NASA at the same time..I myself and my 6 year old son feel like rocket scientist from watching so much of Tim's content..my son AXEL would like to congratulate you on your success and expansive knowledge, maybe some day we could have the honor of watching a launch along side you his hero.. great work 😁
Your content is so high quality and so worth having online for people's learning pleasure. And I can tell that the propellant for your ambition is the best fuel type of all: Passion. May I dare say, sir, you've found your ikigai.
Werner von Braun must have a big smile in his grave!
Also Robert Goddard had too
So great! Thanks for the excellent video. One nit picky comment: at 33:30 you say that there is no acceleration for the rocket in "space" when in fact the rocket (an everything inside) is accelerating toward the Earth. Orbits are constantly accelerating motion. You mention inertial reference frames which which brings up quite a complicated set of ideas for objects in orbit when one considers special and general relativity. I think you know all of this and did a good job of just keeping the video going without sidetracking into the Physics of orbits. :)
I've been watching science/engineering videos on YT for years and just found this channel?? It's second to none.
Well Done, Tim....!!! extremely informative, never knew just how complex engine startup actually was...
Love it all and you really did soak up the start up system, very interesting. Good job.
Hey Tim, awesome video! For the RS-25 start sequence, at 50:25 CCV sits on the bypass leg, so as it ramps down and closes, it forces more hydrogen down the feedlines and through the nozzle coolant tubes
Great Video as always. I was waiting for this video from a long time. Great Job team!!
So much complexity and yet zero failures to start on any mission once in space, kudos to the engineers.
Holly cow, this is shocking informative!
You had done an excellent work on the previous two engine introduction videos, but this is a whole new level of information. I can’t believe you even made animation along with graphs that breakdown every section of the engine bootstrapping…. It is mind blowing
Thanks for the amazing work, Tim, excellent job , as always!
This video did a good job of eliminating my Dunning-Kruger effect. I learned so much, and in the process, learned there's so much I don't know.
When I go to uni in two years for aerospace engineering your videos will certainly help me learn the 'basics'!
OMG.....!! What an amazing accomplishment this video is. You must have done a huge amount of work to get it done. Good job.
Thanks, for this video, what a great explanation to help people at many different levels of comprehension understand the the process and procedure of how the rocket engine works. !!!!!!!!
A minor quibble: The igniter on an SRB isn't any more an explosive than the SRB propellant itself. It's more like a smaller solid rocket lights a bigger solid rocket that lights the primary fuel grain of the SRB. An actual explosive wouldn't produce enough heat for long enough to bring the HTPB of the fuel grain to decomposition temperature (which is necessary to get the fuel to light). You'd also probably blow the top of the SRB off if it was an actual explosive because it would produce too much pressure too quickly.
Really the only explosive in the ignition system is the small detonator that lights the first motor - which has its own slower booster charge to ensure that it doesn't blow to pieces. Rockets are already riding the fine line between combustion and explosion, they don't need anything in there to tip them over the edge.
Dude I’ve studied rockets at university and I’ve learnt things in this video that I didn’t know, great work!
Tim, this was the most fascinating and information rich hour I ever had in my life. Will have to re-watch it at least a couple of times.
Only at the start of the video and loving it already. You even have it written! Let's watch
This was a very worthwhile video to watch. Thanks Tim!
Fantastic video. Answered many questions but particularly the one I had about relighting the second stage while in orbit. You make complicated procedures easy to understand. Thanks to you and all your experts.
The video is SUPER! Absolutely great presentation, graphics, and script. You are a wonderful teacher. Thank you so much.
Best Everyday Astronaut video in quite some time! Excellent video!
In just one hour Ive just had the best education ever on rockets, bless you mate.
We owe such an enormous debt to you and your team. Thanks as always, Tim. 🤓❤️
This is my second time watching this and man, I forgot how much fun this is to watch. I will most likely retain very little of this information but going through all these extraordinarily complicated processes is a really engaging and fun way to spend my time. Your brain is a muscle and if you're gonna use it, you might as well have some fun in the process. Thanks Tim.
This is an incredible explanation of starting a rocket engine. As a former jet engine mechanic, I am able to follow this a little bit. My mind keeps going back to the operation of a jet engine and the similarities of the two at the same time knowing that a rocket engine is a different beast.
Fantastic video. Wish I would've gotten to it sooner. Thank you for being informative and entertaining.
I gotta say I absolutely love that you provide accessible content by means of having this as both written and video form. You're a star!
Awesome video! Thank you for all of your content, especially these educational videos!
this is best video i ever see about info Starting A Rocket Engine, nice work man
I wish there were something like this for all aspects of engineering. The Knowledge that Tim brings to rocket science is astronomical and I can’t get enough of it. Thank you, Sir for your time and expertise in teaching use just a little of rocket science
This video is fantastic. The most interesting hour I have spent on TH-cam by a distance. Well done.
That 2nd "hard start" clip was insane!!😮 love this channel man, keep up the good work!!
And this is the kind of stuff I miss on TV, where you actually LEARN something. Thank you folks for posting stuff like this.
Thank you so much for this kiddo. You've answered soooooo many questions I've had over the years & explained in a way I understand :)
Holy Cow! Who knew? Fantastic primer Tim. Really thought provoking , especially because we take it all for granted. They light up and they shut down. For most people it is that simple and not worth further analysis. Outstanding and thanks!
Thanks Tim for shedding light on the work we do. I can't take credit for the mechanical but avionics is my thing.
Fantastic video! I had no idea liquid fuel rocket startup was so complex and dicey.
Bravo!
Honestly, this is one the best videos I've ever seen on ANY technical subject. My 86 year old dad is a retired rocket scientist (propellant engineer), and I've been a rocket nerd ever since I was a little twerp.
I say it's one of the best videos I've ever seen, because I found myself actually feeling nervous and tense during each "play-by-play" of interrelated variables and processes during the sequence.
This edge of my seat feeling happened repeatedly, because start-up is a balancing act on the edge of catastrophe.
Sure, I've seen some free-climbing videos (no ropes) that gave me the willies even worse... but dat not rocket science.
A tour de force of exposition 👍🏻👍🏻👍🏻
Amazing video, just great as always. It's so cool to see how you've really become a reference in what I would call space journalism. You now have all these incredible deep interviews with these companies' CEO explaining their work, and you perfectly use them in this video to explain different topics. Great work