Why SpaceX’s Starship Raptor Engine Is So Much Ahead Of Its Time!

[@Whataboutit]

Secure your privacy with Surfshark! Follow the link for an extra 4 months free at surfshark.com/felix Happy New Year, everyone! 🎉 We’re kicking off the new year with something truly special-an exciting project we’ve been pouring our hearts into for the past three months. This marks the beginning of a bold new video format for WAI, and we can’t wait to share it with you! But we need your help to make it even better. Your feedback is absolutely invaluable. Let us know what you loved, what could be improved, and how this format resonates with you. Your voice matters, and we’re all ears! Thank you so much for your support-you’re the reason we get to create and share these stories. You’re amazing, and we appreciate you more than words can say. 💙 Now, without further ado, here’s The Raptor Story!

[@max_bro34]

SpaceX updated their Website with flight 7 data. (just incase you guys didnt notice😅)

[@jukeseyable]

im not sure what is capable of producing more hot exhaust gas, a raptor 3, or this you tube video, this isnt exactly a data driven accurate bit of you tube content is it now?

[@NaN-h5w]

Will this mean less space news videos (for example, one informational and one space news video a week instead of the two space news videos a week we have now), or will it mean an increase in video release ? Either way I really enjoyed this new format, it was nice to learn so many things and I'd love to see more. Edit : I created this yt channel just to subscribe to you-- don't worry about losing a subscriber 😉

[@guywithoutintro4211]

Would be great if you could always show the compared stats on the screen. I had a really hard time comparing Raptor 1 and 2 as their stats weren't on the screen at the same time. I know you are talking about the improvements in stats, but following along is easier when the stats are visible (at least for me). By the time you we're talking about Raptor 2 I had already forgotten the stats of Raptor 1 😅

[@ernestgalvan9037]

@guywithoutintro4211…i am the same… keeping the stats is easier if they are shown on-screen, compared.

[@jreber6312]

Quite possibly the best video you’ve ever made. Well done Felix!

[@Whataboutit]

Thank you! IF this is accepted by the audience, and KZbin doesn't saboutage it, we'll make more. There's a problem with the KZbin algorithm. It judges a video by how the core audience likes it. If everyone watches WAI for "news" and doesn't like or expect this kind of content, the algorithm won't share it to others. So... we'll see. I'd love to make more of this for sure!

[@hornbach9279]

@@Whataboutit Maybe you could do them on a second channel if the algorithm gods are against you? Thats what Tim Dodd did for his podcast episodes.

[@oscr_zen]

I 1up this

[@garyc1384]

Except that its bullshit - the engines have put NOTHING into orbit, not even LEO. Musk keeps walking down the thrust, as Thundef00t has shown on film. Put them in a smaller rocket, and they may do well.

[@shynagarg2690]

This is the kind of content what your regular viewers would love to see on top of the spacex updates

[@KenPaulsen13]

Felix, you are leveling up! This video is an example of some of the great content you've been producing lately. The way you break things down and keep it interesting is awesome. Keep it up!

[@Whataboutit]

Thank you very much! I really appreciate it! 😊

[@paulmichaelfreedman8334]

For informational documentaries, Everyday Astronaut is an excellent channel. His episode on Russian engines is phenomenal.

[@KenPaulsen13]

@@paulmichaelfreedman8334 Yes, he's great and deep. However, his videos are often long-form (1 hr). I like this shorter video, a perfect balance of tons of information, made approachable, without taking a whole hour. I also appreciate the more regular updates. CSI Starbase also has some of these deep dives, but again, the length is a commitment. We're lucky to have all these great creators, though... no complaints! :)

[@paulmichaelfreedman8334]

@KenPaulsen13 Yeah CSI also very good, even more detailed than EA. But even less frequent and it's been awhile since he posted.

[@sokolum]

Nice video

[@ravshanoday1073]

Raptor four is just gonna be a block of thin steel that creates thrust through intimidating physics

[@keithcourson7317]

🤣🤣🤣

[@pupschaoticmess308]

TUBE.

[@Psi105]

I reckon V4 will look similar to V3, maybe a little larger plumbing wise to get the additional cooling needed to increase thrust over V3.

[@odysseusrex5908]

Do you mean the physics will be intimidating, or do you mean the engine will intimidate physics? 😁

[@jooseppib1082]

​@@odysseusrex5908it will explode and melt

[@peteclegg1578]

Have to say, Raptor 3 is a truly astonishing work of art. I'm not in the least surprised that Bruno couldn't believe what he was looking at.

[@acasualviewer5861]

It's like the difference between a smartphone and a rotary phone.

[@Psi105]

i do wonder if those comments by Bruno were his own, or something discussed internally at an engineering team meeting about V3.

[@meldroc]

"Where's the rat's nest?" It is mind-boggling that the engineers managed to stuff all of that inside the case.

[@uzlonewolf]

I mean, when you're staring at an existential crises you do tend to deny it's happening at first.

[@dirtypure2023]

Would be really cool to watch a fireside chat with Elon and Tory discussing rocket engines.

[@geoffhurley8103]

The quote from ULA is epic!

[@paulmichaelfreedman8334]

you can bet a year's salary Bruno was completely gobsmacked when he learned it was the complete engine. Never underestimate an autistic genius on a mission!

[@GntlTch]

I would love to have an audio recording of his statement. I also wonder how many times this comment is thrown back in his face during "discussions".

[@ckpioo]

​@@GntlTch an audio recording?, he posted it on X and yeah it's definitely been thrown in his face a lot

[@phrozenwun]

Was going to comment, but the comments already have me covered - so I'll just say thank you, I really enjoyed this video.

[@calc1657]

Incredible design. When the competition is awestruck, you know the design is ground breaking.

[@paulmichaelfreedman8334]

It's nearly magic how they've managed to internalize all those components.

[@odysseusrex5908]

The competition wasn't just awestruck, they didn't even know what they were looking at.

[@qerku_5640]

2:56 I was really hoping you'd say "A fully reusable super heavy lift rocket capable of delivering a banana to orbit"

[@OneIdeaTooMany]

Same

[@ExHyperion]

By those same measures the SLS is a super heavy lift rocket capable of lifting 3 dummies to lunar orbit

[@markusharder2335]

Haha me too 😂

[@rifz42]

"We choose to get a banana to orbit in this decade and do the other things, not because they are easy, but because they are hard"

[@jooseppib1082]

@@qerku_5640 and by reusable you mean its melting and exploding capability? And by orbi you mean sub orbit because they have not even made orbit once

[@FreeOfFantasy]

~5:00 There are no explosions in those engines. It's all combustion, an explosion would be an detonation. coincidently that is what rotary detonation engines are doing and they get some more efficiency and performance from it.

[@filonin2]

Exactly! He goes on and on about explosions when none are happening.

[@carlosvasquez9890]

Yeap...that. Two completely different physical phenomena.

[@jnawk83]

It's pretty irritating. Propagates ignorance too. So many people talk about rockets being controlled explosions all the way to space. If you have an explosion, you are not going to space today.

[@johnd.7792]

The word that should be used is conflagration, which is subsonic. An explosion is supersonic, and thus, you get a shock wave.

[@paulmichaelfreedman8334]

@@johnd.7792 Explosion can be sub or super sonic. Sub its deflagrations, super its a detonation.

[@jimtonimarin]

Thanks!

[@keaton52257]

2:33 Every time you say raptor I don’t think of the prehistoric creature rather, this is what I think of. It’s nice to see it actually in a video after all this time.

[@keaton52257]

Fun fact: the Ford F-150 Raptor began production in 2010 with the 2011 model year. Not to dissimilar to SpaceX’s first generation raptor beginning development in 2009 (2011 according to this video).

[@paulmichaelfreedman8334]

Raptor's successor, LEET(1337) will have even more thrust; it will make Mars missions possible. Not much info on that engine though, although it's already in early development phase. Possib ly, this engine will be able to be combined with a nuclear engine, using the same engine bells. Knowing Musk this is something he will try to integrate to save weight.

[@therichieboy]

I believe it, like merlin and kestrel, was named after the bird.

[@paulmichaelfreedman8334]

@@therichieboy Well, proto-bird. Raptor comes from Velociraptor, the famous dino from Jurassic Park.

[@nelsonprestan3]

@@paulmichaelfreedman8334 it's more about birds of prey than the Velociraptors/Dinos (ground raptors): The term raptor is derived from the Latin word rapio, meaning "to seize or take by force". The common names for various birds of prey are based on structure, but many of the traditional names do not reflect the evolutionary relationships between the groups Rapio = To joink (present infinitive rapere, perfect active rapuī, supine raptum); third conjugation iō-variant to snatch, grab, carry off, abduct, steal

[@tommcmicken4776]

As a famous space engineer (Montgomery Scott) said "The more you overbuild the plumbin, the easier it is tobstop up the drain" !!!

[@Whataboutit]

🖖

[@sallerc]

Can someone explain that to a non-native speaker? "plumbin" is plumbing I guess, but the rest?

[@JustMe-dc6ks]

Should have been “To stop up the drain.” The meaning was that the more complicated or precisely engineered something is the easier it is to break.

[@sallerc]

@@JustMe-dc6ks Ah! Thanks

[@scottmcgahey6820]

It's a star trek reference In the movie the search for spock

[@Fatpumpumlovah2]

I remember that day on X when Elon put up the picture of Raptor 3 and that idiot at ULA made his post that its missing many components then hours later the video of it firing came out, making them all eat their socks. Best day ever and i was hoping it would keep their mouths shut for a long while, which it has so far.

[@OneIdeaTooMany]

Tory Bruno is no idiot but it was said in poor taste. The thing that tends to hold people back from innovating is their inability to think outside the box OR have people under you doing that. This was probably the kick up the butt the industry needed for them to actually put some effort into innovation.

[@Fatpumpumlovah2]

@@OneIdeaTooMany Definition of idiot is a foolish or stupid person... That first part (foolish) fits him 1000%

[@realulli]

I still remember Gwynne Shotwell's comment, along with the video - "Runs rather well for being only partially assembled, doesn't it?"

[@MistahHeffo]

Disclaimer: Tory Bruno blocked me on X for calling him out. Tory Bruno is no idiot. He was ill prepared for such an evolutionary leap in engine technology. I guarantee he's not quiet on it because of feeling stupid, he'll be working with suppliers to get caught up because the cost difference between an engine from Blue Origin would be FAR more expensive than a Raptor, and the engines are the most expensive part on a rocket.

[@realulli]

@@MistahHeffo A sign of class would have been to go public and acknowledging his mistake. Owning up to your mistakes isn't in style, apparently.

[@dgthall]

This was an excellent overview of a tricky and complex topic, and I think the way you presented it was a great balance of simpler descriptions and just enough technical detail to give this geek lots to ponder and dig into further. You've also not just stated but shown directly what approach SpaceX is using for design (and more importantly, iteration and improvement) of this engine. I had forgotten the stated goals for thrust and specific impulse - definitely shows they have a way to go. Definitely like this format, it was really well done. It will make a great addition to the regular updates many of us have come to depend on twice a week. :D

[@surbhikumari953]

I got to say that this video was one of your most informative videos. Really worth it!!

[@jaimeduncan6167]

People that works in an industrial setting should see this video, even if they don't care about rockets.

[@surferdude4487]

"the best part is no part" This engine certainly reflects that philosophy. And they aren't done yet.

[@cajampa]

This is what I keep thinking about ever since I saw that thing. They have made such huge strides far beyond what I ever thought was possible. And I have to assume they aren't even done. What is next can they keep going......I can't wait to find out.

[@therocinante3443]

Omg, this video is actually about the Raptor 3. Nice change of pace.

[@spookysem2150]

I really really loved the explanation in the first half of the video! Way more informative than other videos

[@MrJoost91]

Love the video, but I gotta correct you on 1 issue. The hydrogen used as fuel is not a single atom, hydrogen is one of the 7 diatomic molecules. So when talking about hydrogen it is H2 (2 atoms bound together). Still a very small molecule though!

[@Whataboutit]

Yep, you are absolutely right, I should have been more precise.

[@Diapolo10]

And technically speaking hydrogen atoms aren't the smallest; it's a bit counterintuitive, but helium atoms actually take up less volume. Hydrogen has the lowest mass, though.

[@jonniiinferno9098]

@@Diapolo10 lol - show off 😜

[@robertherndon4351]

Yes. Liquid hydrogen is deeply weird stuff for many reasons (Heisenberg's Nobel -- Einstein nominated him for it -- was for explaining hydrogen's thermal properties), and rather hazardous to handle. The biggest problem for its use in rockets however, is that it is very light, as in very non-dense ( > 13 liters per kilogram), and a "deep" cryogen, meaning it will condense air directly. Liquid methane's hydrogen density is considerably higher than liquid hydrogen's! So hydrogen/LOX engines need huge (heavy) insulated (heavier) tanks to store hydrogen, and big turbopumps to get sufficient quantities into a combustion chamber. So they have terrible thrust/weight ratios, and make lousy booster engines.

[@simongeard4824]

@@Diapolo10 And helium causes just as many problems... just ask the Starliner engineers, but they're far from the only ones having difficulty with helium valves...

[@bobgraham9481]

I really enjoyed this presentation, Felix. YOU ROCK.

[@troyworkman]

I LOVE this video. Yes, Starship (and other) updates should still be most of your content, but the occasional deep-dive or explainer video would be excellent!

[@daveyshmavey]

Felix, this video was really GREAT! We all get tired of all the same content on all the other channels, even rerunning old info. This was fantastic! Any other videos going into the nutts and bolts would really be a game changer. They don’t have to be Huge things. Simply going into unknown details of processes. Great Job!

[@cacogenicist]

I would have thought most subscribers to this channel have already watched Tim Dodd's rather in-depth videos on the subject.

[@simonboyne-manchee6851]

@@cacogenicist until I ready these comments I hadn't heard of Tim Dodd

[@sipowers3311]

This is a great explanation for both the layman and enthusiast, good job Felix.🙂

[@HomesteadDaddyDiY]

Well done Felix, this video was very fun to watch and very informative. I love your jokes and sillyness in between, never stop doing that!

[@michaelotoole1807]

one of your best video's. thank you Alex.

[@Whataboutit]

I appreciate it! 😊

[@davidbosson2855]

Thank you for going over this in simple terms . Very cool

[@robshephard5388]

Wow, this was one of the best videos I have seen that describes the Raptor. Thank you Felix and team.

[@etymologik]

Excellent explanation. I love this level of detail; you hit it exactly right. And 3D metal printing! Love it! More of these please, when you get the time.

[@pauldamse253]

Very nice, we want more of this kind of video!

[@Whataboutit]

We're working on it! 🥳

[@seans5710]

@@Whataboutit yes, fantastic video. Thanks. Long time lurker. If you are open to a suggestion, a video on what a minimum viable settlement on mars would look like would be really cool. Meaning, what bits and pieces would be needed for a large camp, or small exploration station? A boring tbm, some power plants, hab modules, a few cybertrucks. But, what else? And how is it most logically put together, based on real world engineering principles? Your breakdowns of starbase build up are great, so it’s probably perfectly in your wheelhouse!

[@marlonlaquindanum9728]

wow no more bloopers. nice job, really love this channel. no.1 fan here in the Philippines!!!

[@Whataboutit]

Thank you! ❤️

[@pilotdave9442]

Sorry Felix - the first closed cycle jet engine to fly were very late in the CCCP space program.

[@Tyrannosaurusstudios]

rocket engine not jet also the raptor is full flow staged combustion not closed cycle

[@imconsequetau5275]

The Russians were long using full-flow staged combustion engines, but for military purposes. The original bi-propellants were highly toxic, and so the potentially crewed ship designs avoided their use in booster stages. Oddly enough, toxic propellants are used within both the SpaceX and Boeing crewed capsules, and our Lunar Lander. Perhaps that's the main reason why pressurized suits are used.

[@Ghost_FEU]

Your production quality keeps going up and its inspireing

[@Whataboutit]

Thank you!!!

[@guss77]

Describing the combustion process in a rocket engine as "an explosion" is misleading and technically incorrect: rocket fuel combustion is almost always deflagration (subsonic combustion) that isn't considered "an explosion" by most experts. A combustible material exploding is technically understood to be detonation (super-sonic combustion) and there are no current rocket engines that use a constant detonation to propel rockets. NASA (and others) are researching RDE rocket engines that use a constant detonation to produce much more force than current deflagration engines - but practical implementations are (at best) years away.

[@Whataboutit]

I should have added that this is an incredibly dumped down and possibly incorrect way of explaining it. You’re right, but I chose this actively as talking about sub sonic combustion wave fronts wasn’t the goal of this video. For that you need to watch Scott Manley. The point is that even though I explained it this way, it doesn’t mean that I don’t know this. I did similar things many times during this video. The result was that many finally understood. That is my goal. Not teaching someone who already knows, like you. ❤️

[@russrobinson2979]

Absolutely loved this Felix. Mesmerising stuff mate 😊

[@Aavagirl]

Some of the best content of all things SpaceX found anywhere! Thank you!

[@t.a.r.s4982]

Interesting, but a bit optimistic. Raptor 3 is still in development and is not ready at all. Even if we saw a short static fire, it doesn't mean they'll succeed to convert the prototype we saw in a working reusable engine.

[@paucugatsuari2847]

There have been full flow engines used successfully in flight. The Molniya used them in the 60's, the N1 also used them. Atlas III and V used full flow engines too. The Raptor engine is the first time an American company is able to successfully design a full flow engine.

[@imaginary_friend7300]

Full flow staged combustion and the Raptor was the first to fly. Molniya used the 108 which was an open cycle, the N1 used the Nk 15 staged combustion engine.

[@simongeard4824]

You're incorrect. The Soviets had many staged-combustion engines and the Americans have built a few too (RS-25), but Raptor is the first full-flow staged-combustion engine to fly.

[@103WoollyTrees]

Amazing video! A wonderful explanation of a complex thing!

[@biggles258]

Wonderful video. Nice one, Felix 👍👍

[@Whataboutit]

Thank you! Cheers!

[@wolfiewolfman]

This is pure brilliance, Felix. Truly one of your finest creations!

[@sokolum]

Nice video, happy new year!

[@Whataboutit]

Thank you! Happy New Year to you as well!

[@ianupton5239]

A lovely, clear and (most importantly) accessible explanation, Felix. Thank you 🙂

[@ablert]

Best video of the year! Haha, get it? I love this type of videos, they're incredibly interesting! Keep up with the amazing work, Felix! 🚀🔥

[@Barthhhelona]

I don't normally comment, but this was a very well done video. Perfect balance of laymen analogues along with technical detail. Great job team!

[@Whataboutit]

❤️

[@stevecam724]

Top video Felix 👍👍👍 SpaceX is on the brink of Raptor 4, either Elon or Gwynne anouanced it recently. They were saying Raptor 4 will be a massive change for the Starship 😆👍

[@AZZaidi]

The spectacular engineering of the Raptor 3 is beautifully conveyed in this delightful video. What a gift it is to humanity. This applies to both, the rocket science shown and the communication science conveyed by WAI. This video is a gift to science, and even simple curiosity and visual presentation. Lovely job. Thank you. Wow.

[@ButlerBeachTray]

Wow - love the new intro! Had to stop the video after the first 35 seconds just to leave a note. Can't wait to see if there are any other fancy changes... Keep up the great work!

[@MadScientist267]

This is pretty cool. I don't agree with calling it an "explosion", it is simply continuous combustion. The simplicity of that thing... he's right. Saying older than me... "perfection isn't achieved when there's nothing left to add, it is when there is nothing left to take away". That engine proves it.

[@AlexandarSterling]

Much more like your old content, well done

[@jeremytaylor3532]

Great Informative video - thanx Felix! The first time I saw Ver 3 It was so sleek and gorgeous, I had difficulty imagining how they could improve it. Having lost quite a few sleepless nights thinking about it, I think version 4 might be completely metal 3D printed, with absolutely no joints or flanges or welds. Just one light as possible single one piece engine with turbines printed as well or with turbines or reactor chambers roboticly inserted directly into the printer mass to become a single entity. This technology does not exist yet, so Space X will have to invent it. Go Mars Gadget Go.

[@GilbertoGuzman-m8p]

More videos like this one please!

[@Tom-cruiser]

Happy New Year to you and your team Felix ! And of course for everyone ! 😀

[@Whataboutit]

Happy New Year!!!

[@_mysilentblue2227]

Thanks Felix and team. The evolution of Raptor in fantastic, fly baby fly!

[@ct6502c]

Great video! And yes, I've only recently heard about how hydrogen can leak through metal and weaken it over time. I think it's called "hydrogen embrittlement".

[@SleepyGamerPR]

Damn this video has possibly the best intro of your videos. Pls do more videos like these

[@shrodingerschat2258]

I'm still waiting for an Epstein Drive.

[@anekdoche7055]

Epstein fr ruined the name.

[@Kesenb3126]

Better a Shaw-Fujikawa engine

[@BakudanBagyoSakuna]

Can't wait for the Diddy Drive. Probably need lots of baby oil to run 😅😂

[@definitelynotthefbi725]

The Epstein drive didn't self-destruct!

[@KiRiTO72987]

Expanse gang

[@agmeister7446]

Great work explaining such complex stuff with a touch of SpaceX thinking, aka turning it simple. Looking forward to more videos like this.

[@druspork7737]

Awesome work, Felix. You step through from compressed gas tank to combustion was an “ahah” moment for me.

[@Whataboutit]

🥳 I'm glad you liked it!

[@johnstewart579]

Thank you for this informative in depth video. I wonder if the Raptor 4 engine just might be humanities first (star trek) impulse engine

[@sukjinderpurewal4527]

Excellent easy to understand explanation, great job Felix😊

[@GilbertoGuzman-m8p]

This was a real documentary which I like very much

[@iwobbly9374]

Great show to start the new year! 🎉

[@shortwave737]

This was a very cool video. I also learned what open cycle and closed cycle means which I had only ever heard over in Terra Invicta before so I didn't really understand what that meant. There was a lot of things I learned from this one actually. 10/10 video guys. Well done.

[@nightfox6738]

This rivals one of Tim's deep dives on Raptor. Great job Felix!

[@ASDasdSDsadASD-nc7lf]

NO.

[@VisualPixels-Digital-Art]

Really cool Video! Greetings from Germany to Felix!

[@0nTheRedline]

Outstanding video. So good.

[@odysseusrex5908]

Very excellent presentation Felix. I feel as though I understand this much better now. Thanks.

[@Whataboutit]

Ha! I was able to explain something to you! Happy New Year, friend that I never met! Thanks for following along for so long! ❤️

[@Naturalwhite46]

Great video! thanks team was very educational!!

[@Tshedza-j6w]

This is a different yet refreshing vhdeo from your mr Felix. Loved it!!❤

[@User_hrh4d6-ysi]

Keep up the good work, love the new format!!

[@filipmaruska3983]

Great video almost felt like watching Mustard

[@johnnymaynard299]

AS always Awesome Stuff !

[@mpetersen6]

Additive manufacturing is what makes a lot of this possible. Also SpaceX has refined its construction/assembly processes on StarShip and the Superheavy Booster reducing the dry mass of the vehicle.

[@lennart25311]

Very good video, Felix!

[@MarcusSHere23]

Happy New Year!

[@Nixontheman]

The best Space channel.

[@droid1342]

Felix this was excellent and informative "WAI" to go and keep it up😂

[@the_new_project]

Great video. Loved it. Thanks. I am watching it again.

[@ArthurSchell]

hi, einer deiner besten Sendungen, danke

[@paulcarpenter999]

You left out two other insane Raptor design requirements: deep throttle and in-flight restart capability.

[@Whataboutit]

Not just that. Also mass production was hardly touched. Want a 60 minute video? I chose these aspects as they seemed most important to explain the bigger picture.

[@fluffy24]

I like it when I can do stuff in the house or play or whatever and just listen to the audio and get cool info. I like the way you explain for hte normal Joe

[@jupiclv5169]

The wibe about this video iits so good! I cudnt get off... its like a magnet! Well done! Hard work pays off gratly!

[@maxvlaarhoven]

Love this topic based format!!!

[@duongden_thanhcong]

thanks for making this video 👍👍

[@diraziz396]

Great Feat. Alex. Thanks for the 3D

[@gregorywaspe1586]

Epic nerdsplaining... I love all your videos, but yo be able to explain such a complex technical subject takes true skill!!!

[@ronmill80]

Great deep dive! Thanks Felix!

[@collinE83]

I appreciate the effort that went into this episode. There’s a lot more here to digest than normal.

[@michaelcheers1805]

Thanks again Felix for another outstanding episode. I always look forward to tuning you in every day. Keep up the great work and again, thank you!

[@rolandkinzer3211]

Felix, this was the best Video I ever saw from you. Very good job!

[@twoeagledrones]

Awesome! I’ve been waiting for this explanation. Thanks

[@Vastafari34]

BEST VIDEO YOU'VE EVER MADE !

[@matthewhickey5972]

Great history lesson ! You Rock !

[@Whataboutit]

Glad you enjoyed it! 🚀

[@scottydale5305]

Very good Felix and team

[@alyoshakaramazov8469]

14:27 Hydrogen is a little bigger than you described. Two protons and two electrons. In rocket fuel molecular hydrogen, H2, is used.

[@Tyrannosaurusstudios]

that is helium 2

[@stainlesssteelfox1]

I thought the Kestrel upper stage engine was developed first, but it looks like it was developed in parallel with the Merlin 1A, both used on Falcon 1.

[@LowKey_Loki89]

Yay! Rocket science made easy, by Felix! Way to go man! Love it!

[@anatoleh1]

Great video! Breaks up the usual cycle of old news