Elon Musk Explains SpaceX's Raptor Engine!

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Today we’re getting up close and personal with SpaceX’s Raptor 2 engine with Elon Musk. We get into all sorts of details on this engine including how exactly it’s been upgraded and simplified compared to Raptor 1.
This video has a ton of fun details on some fairly technical stuff, so be sure and watch my "Why don’t rocket engines melt" video - • Why don't rocket engin... - so you know what we’re talking about with some of the cooling techniques as well as my video on engine cycles - • Rocket engine cycles: ... - so you understand how the Raptor’s full flow staged combustion cycle works and why it’s advantageous!
00:00 - Intro
00:50 - Conversation Starts
02:00 - Raptor 1 vs Raptor 2
03:50 - Thrust and Chamber Pressure
05:30 - Iteration Philosophy
06:30 - Melting Engines and Cooling
09:30 - Torch Igniters and Starting
13:00 - Full Flow Advantages
15:30 - Swirl Injectors
16:40 - Thrust Vector Control
20:30 - Simplifications
24:50 - Removing Throat Film Cooling
25:35 - Boost Pumps and Impellers
30:35 - Inline Powerhead Discussion
32:15 - Fluorine, Dual Cooling and Aerospikes
35:00 - Chamber Pressure and Impulse
40:00 - Outro
--------------------------
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19 май 2024

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Комментарии : 4,7 тыс.

@per619 Год назад

I have not seen another interviewer--even with major media--that seems to work as hard at understanding the science. I think that's one reason Elon gives Tim such great access.

@ParkerUAS Год назад

Tim also doesn't edit Elon to "say what they want". He lets the full interview play and the viewer is able to get the full context of what is being said.

@David-yo5ws Год назад

Tim's 2 year mission with his Mission Directors, to create the Russian Rocket History, has certainly given Tim 'the edge' of any other interviewer. And we all benefit with getting this incredible 1 on 1 interview for free on YT. I have only brought a photo and hat so far from Tim's shop, but hope to be financially well off to sign up as an active supporter soon.

@Richard-wh9wm Год назад

Hahahahahahahaha

@Mrbfgray Месяц назад

Establishment reporters are clueless about most everything beyond sports, stocks and the current events. NO WAY they could begin to pull this off even if they studied the topic for yrs.

@P1915 7 дней назад

Yes! Yes!

@friendo760 Год назад

Tim, you elevated your rocket engine knowledge to the point where you can engage in serious conversation with Elon Musk. That’s not all…you also know enough to prompt him to ponder serious technical issues and concepts relating to rocket propulsion. Your passion and efforts to educate yourself is on full display.

@CasinoWoyale Год назад

So how many rocket engines has Elon Musk designed for his level of rocket engine knowledge to represent any level of achievement?

@monsieurbacteria1923 Год назад

@@CasinoWoyale i think too many rockets and lots of reading

@AG-ig8uf Год назад

@@monsieurbacteria1923 OR maybe zero rockets and very little reading? Musk knows very little about rockets, let alone about rocket engines! He assigned himself various "chief engineer" titles and repeatedly made fake claims about him designing rockets. Ffs, do you realize it takes years of studying, then years of working in industry to become engineer in ANY FIELD, let alone rocket engines! Musk NEVER STUDIED ENGINEERING and HE NEVER WORKED AS AN ENGINEER! Engineer is not self-proclaimed title, for most of engineering fields there is thorough certification process, and Musk WAS NEVER certified as engineer, period! He is a fraud who loves to pretend that he knows about rockets, AI, neuroscience, machine engineering etc etc. He was repeatedly debunked by real experts in respective fields, yet his cult minions will continue to think that he is some demigod, who knows all the secrets of universe by birth.

@Domequike Год назад

he even brought elon to an idea last time.

@michelleper5065 Год назад

i dont think mask ever had a job in his life forget about the rest of the nonsense.

@richbarrows3922 Год назад

Musk clearly appreciates being interviewed by someone who understands and connects at a very high level instead of asking about his business plan or something irrelevant to him. Way to go Tim.

@NoeticMuse Год назад

Im amazed how "on top" he is on the engineering, he seems to know everything - rare for a CEO to be so technically proficient

@jorelldye4346 5 месяцев назад

He IS an engineer. He is one of the most involved engineers at Spacex.

@high1voltage1rules 3 месяца назад

the mans a genius. and the world has changed for the better because of him.

@husky6720 Месяц назад

Elon is a unique engineer. Usually an engineer will know a lot about only a few engineering things, Elon knows a lot about many engineering things and to amazing detail, be it a rocket engine or an electric car. I doubt there was ever an engineer like Elon, period!

@jacklarue7049 Месяц назад

Rare yes, but if you ask me, necessary. Other companies should definitely follow suit. Results speak for themselves.

@jacklarue7049 Месяц назад

@@husky6720You're forgetting the Godfather bro, Tesla.

@noe616 Год назад

I love these Musk technical interviews. Elon gets to let his guard down and be more himself. They are historical.

@r3d0c Год назад

one day he should technically research subways

@Bingqilinghenhao Год назад

The boring company is really just a more expensive way of adding more lanes to highways. I think he knew that and that is why he didn’t do any technical interviews.

@duroxkilo Год назад

historical in the sense there's never been 'a head rocket engineer' or whatever his title is at the moment who knows so little about rockets and presents that little knowledge so fragmented :}

@AkaiKA4K Год назад

@@r3d0c You should also research why subway are so expensive especially in the US.

@AG-ig8uf Год назад

@@AkaiKA4K Maybe Musk should have researched that before making outlandish promises about boring company tunnel costs.

@elmac26 Год назад

Crazy how 40 years ago these type of projects were top secret and now we have tons of information of everything going on and the head of the project explaining every detail!

@spider0804 Год назад

Personally I think the industry hid behind "secrecy" to not spend money on advancing the technology and keeping their cash cow. Even the SLS uses 70's technology, no one has been innovating. Why innovate when you know you will be paid no matter what? Gotta love SpaceX for willing to break a thing or two to figure out how to fix it.

@joeysipos Год назад

I have a feeling he wants competition so it will drive him faster and harder to innovate on the cutting edge

@obsidianwing Год назад

@@joeysipos I also think so , crowd knowlege raises more creative Mind to bring humanity forward. he has the Money to do so. Also Musk is not neurotypical they think in bigger dimensions and i can relate to this.

@1universe1people Год назад

except they dont show all the black budget projects with anti gravity

@Hmfirestormz Год назад

most countries do not have plans or care for space exploration... they have nukes and the capability to destroy the planet. they are satisfied

@juaerez69 Год назад

Tim, you are documenting important and real future history here. These will be viewed by many in decades to come. Thank you and congratulations.

@rezzasaleh9768 Год назад

you wont have this kind of interview on mainstream media.....kudos tim....this is phenomenal

@Mrbfgray Месяц назад

I assume Elon agreed to this because Tim has invested so much in understanding rocket engines and is not intimidated by Elon.

@LitheInLitotes 10 дней назад

And because Tim isn't a brainless shill that does a 180° when the media tells them to add starts saying "Elon man bad"

@calebj1145 Год назад

Key takeaway: Elon Musk watches Everyday Astronaut videos when he’s hanging out with his friends.

@wheeln24-79 Год назад

Was coming to comment that it's impressive that he still has time to hang out at a friends house. Can't imagine it's very easy to get downtime like that but Elon doesn't seem like the kind of guy that likes to relax around the house if he has the afternoon off...

@ElaineWalker Год назад

How cool is that?!

@mrbennpulse3620 Год назад

My question is. Why hasn't he hired him yet

@gundolarry Год назад

@@mrbennpulse3620 Might be the value with a "cold-eyes review", or bias. Probably better for this relationship (for both guys) for things to stay as they are now. My 2 cents.

@markedward4290 Год назад

@@mrbennpulse3620 Maybe he has

@mp6756 Год назад

Tim is a legend of RU-vid he has taken himself from having an appreciation for rocketry to having a full blown understanding of rockets and rocket engine knowledge. What a great path he has laid.

@randomguy9664 Год назад

find a problem find a solution that problem - elon musk

@Tezza120 Год назад

Kind of sounded like he wanted a job there haha

@-108- Год назад

Now let's hope he can capitalize on that knowledge.

@randomguy9664 Год назад

rockets can be used using coca cola or co2 but not sure why nobody is doing it

@CHIEF_420 Год назад

🎓

@decnine Год назад

Elon's understanding about his rocket engine is insane, surely it will propel us towards the stars sooner than we think.

@jorelldye4346 5 месяцев назад

He spends most of his time engineering. He's far less involved in the business side than the engineering side at both Tesla and Spacex.

@DimeandKirk 5 месяцев назад

He's the cheif engineer at space x. He literally is the head of the design of the rockets.

@asdqwe4468 Месяц назад

@@DimeandKirk Maybe on paper. For engineering, no. Remember he's trying for quite some time to do what others did over 50 years ago.

@varietyegg Месяц назад

@@asdqwe4468boi what

@DimeandKirk Месяц назад

@@asdqwe4468They made a reusable rocket this powerful 50 years ago?

@schafflending Год назад

I have come back to watch 20:30 - 22:10 so many times. This concept which could take volumes to discuss is so distilled here.

@scienceskills Месяц назад

You're right: it's an important but easy principle. That's based upon an evolutionary tendency that first aims at keeping things complicated, and then seeks to make them simpler (deleting parts as Elon says.)

@hi__hassan 14 дней назад

Liked this today to remind you (in case you forgot or moved on) PS: I watched the clip today and even I'm gonna come back at least four to five times to fully understand the steps he is talking about.

@lillyanneserrelio2187 Год назад

A CEO that actually knows the science behind his product? # Respect

@Topper_Harley68 Год назад

He is an engineer.

@drury2d8 Год назад

Half of the stuff he says is gibberish, a typical sales engineer.

@trancenut81 Год назад

@@drury2d8 like?

@TuberoseKisser Год назад

????? He literally helped design his own rockets

@ashkara8652 Год назад

@@drury2d8 you clearly don't know what you're talking about

@TheArtofCraftsmanship Год назад

Love this Elon Series! Walking around his world with an informed interviewer is a treat. Thank you.

@masternobody1896 Год назад

find a problem find a solution to the problem - elon musk

@kafilkavich707 Год назад

Who cares, many farms are shutting down all over the world!!! When we all can no longer get food and all starve to death, who really cares about any of this? Our society is doing a great job in distracting the human population with complete nonsense. Investing all this money and resources to try and go to mars has 0 benefit to our society!

@Fred-yq3fs Год назад

I bet Elon must find it refreshing and energizing. I mean when you watch the very poor interviews by say the WSJ, you feel for the man, trying to explain concepts to idiots who fancy being clever and well informed.

@brois841 Год назад

@Ben Benito only because most people are closed minded and prefer to misinterpret everything. Elon calls himself the Meme Lord... not everything he writes should be taken seriously and certainly not every opinion will resonate with everyone.

@brois841 Год назад

@Ben Benito how do you misinterpret 420?

@user-vt3nj6tn5e 3 месяца назад

You did a terrific job with this. I thoroughly enjoyed it. Got a little pulled off around the bubbles, but I tried to keep up. I’ll keep an eye out for more of your content. Good job.

@matthewmarszowski8493 Год назад

LOUD NOISES engineers and architects are my favorite humans and they deserve all the credit for stuff like this

@WWeronko Год назад

Over the years I have lamented the incredibly slow technical development of rocket engines. Even today engines like the RL-10, AJ-10, RS-25, RD-180 that are results of technologies developed as early as the 1950s, are still in use. I was told by many that RL-10, for example, with its ISP of 465.5 seconds was the best that could ever be. I replied that it was as absurd as stating a 1957 Chevy was the pinnacle of automotive technology and could not be improved. Elon and his genius rocket engineers have shown what is possible. The Raptor 2 is levels more advanced in so many areas than anything else in the world. It gives me great confidence for humankind’s future in space seeing the extraordinary engineering work that is going on in SpaceX.

@hugokappes4077 Год назад

even funnier when you consider how Elon has improved cars as well,,

@Blaze6108 Год назад

I only soft agree with this. While these engines are very advanced, they are still fundamentally fossil-burning motors. IMO if we are to truly advance to a solar system-wide civilization we need to figure out better propellants and better ways to derive thrust power. I'm not saying The Expanse-level torch drives, but at least something with better ISP than hydrogen. (no, current ion drives don't count because they have the thrust of a hummingbird) EDIT since it wasn't clear: the issue with fossil-burning motors isn't the fossil part, it's the burning part. Combustion-based rockets have garbage ISP.

@irchrisb Год назад

@@Blaze6108Right? Even ion drives have to get their power from something else.

@Noneusertaken Год назад

@@Blaze6108 Maybe nuclear engines at some point, when ships can be built in orbit around Earth.

@TheMhalpern Год назад

@@Blaze6108 the fuel doesn't have to come from fossils, that's one of the nice things about methane in rockets (long term) it's easier (energy cost) to source renewably than hydrogen

@ddview3067 Год назад

🤯 Superb Tim… and Ponder this… Elon Musk just said - “Me and a friend were watching your video”. Regardless of content that is a hugely important connection of trust and a look inside the mind of arguably the greatest visionary in spaceflight since Werner Von Braun. I loved that you could ask “How does it light then?” and he smiled then laughed and said “now that’s the secret sauce…. Now I can’t tell you the secret sauce”…. So good!

@JanBruunAndersen Год назад

@@gursehaj5754 - #13:28

@youtubetv1414 Год назад

@@gursehaj5754 10:00

@Barskor1 Год назад

Arc ignition....

@naes6843 Год назад

DDView, I was thinking the very same thing. Dave in Phoenix

@C40V15 Год назад

"how do you light?" "-With a lighter dummy!"

@ritasseremba6435 Год назад

So instructive and described in a soft style that brings the raptor to life..as the marvel that it is🙏🏻thanks for sharing ❤

@kohanrains776 Год назад

I really appreciate the way he approaches questions he's not allowed to answer for secretive reasons

@edsherwood2173 Год назад

It’s insane how motivated Elon is. I see people trying to knock him by saying it’s his people and not him. It’s definitely true he’s surrounded himself with like minded people but you can see his influence in all his companies. He’s one of those people you can put a problem in front of and he’ll always figure it out

@AG-ig8uf Год назад

Let me see.. He vindictively fired all employees of Space X who signed an open letter demanding management to separate Musk public behavior from space X , because it was causing big distraction and harm. So much for free speech champ. He planted complete puppets into every position in space X, and changed it's course to absurd projects like Starship, ignoring projects which are actually working. Most of talent already left or was fired from space X, and with Musks unimpeded idiocy and self-aggrandizing, space X is unfortunately doomed. I can't believe I used to admire that fraud.

@carloss2202 Год назад

Elon is always criticized by anyone who is unable to do 0.1 percent of what this great man has accomplished.

@xxxmxxwm1564 Год назад

Stop being so in love with him. Don’t you understand that he doesn’t want anything good for YOU & me? He was created as a ‘nice’ guy to make people love him and defend him.

@edsherwood2173 Год назад

@@xxxmxxwm1564 he doesn’t owe you or me anything. I can care less why he does what he does I just love seeing the innovation. Who the f cares if he’s doing it to save mankind or if he just thinks rockets are cool. U people are wierdos

@carloss2202 Год назад

@@xxxmxxwm1564 hahaha 🤣 stupid people try to convince other to be to be like them .. I am not a lover nor a hater like you.. only facts..

@donjones4719 Год назад

It's impressive to see how focused Elon'e mind is. He's obviously tired in this set of videos but able to explain things pretty thoroughly . Importantly, he can digress but not lose track of the original point, and return to it clearly. The only sign of tiredness is a bit of repetition - but he's used to having to repeat things in his many interviews.

@Naitsabes68 Год назад

Focused on those cheeks

@Lexyboogie Год назад

After this Twitter debacle, I don’t know if he’s exactly focused right now.

@_general_error Год назад

Actually Elon is repetitive very often, it is a symptom of him Aspergers syndrome. I am not sure, but Aspergers might be the key thing keeping Elon so focused on The Goal overall.

@FredT34 Год назад

@@Lexyboogie he probably doesn't give a f*ck to this thing

@Ithirahad Год назад

@@Lexyboogie This was shot before that. It has just been released in parts over such a long period of time that the whole Twitter mess happened during the release timeframe.

@N1gel Год назад

I wish I could thumb up for every time I rewatch this video. Thanks Elon, thanks Tim & all involved.

@dion8227 6 месяцев назад

The "area under the force vs time curve" is usually called "total impulse", since it is the integral of thrust over time. ISP (aka specific impulse) is just the total impulse referred to the propeller weight at Earth surface

@nerdwatcher4273 Год назад

Just two informally educated rocket nerds discussing the most amazing advancement in space tech in decades. Jeesh I love these interviews. Keep it up Tim! What’s really amazing is the level of detail that Elon can go into on this masterpiece, and can turn on a dime, open up another brain file, and discuss the same level of detail for anything at Tesla. Not to mention his smaller endeavors. I totally agree with those who have mentioned that these interviews will be part of the historical record and future classes on many topics. Well done sir👏👏👍

@NHCH Год назад

On top of that Elon couldn't even get into much details because of national security reasons. mind-blowing

@omniyambot9876 Год назад

@@NHCH oh really? That's interesting. Lol

@NHCH Год назад

@@omniyambot9876 yeah, he actually says in the video that he can only talk about the exterior of the rocket

@omniyambot9876 Год назад

@@NHCH is this a law? Like he is an engineer but still can't share those details?

@dirtypure2023 Год назад

@@omniyambot9876 There's a national security aspect to the function of Raptor 2, since SpaceX holds (I assume) several contracts with the US military and NASA.

@codedesigns9284 Год назад

I love Elon’s explanation of not going through the motions of optimizing a part for efficiency when the part doesn’t need to be there. 100% more efficient in best case scenario! Wise!

@railgap Год назад

One thing he hasn't mentioned about the reduction in complexity is that in addition to the chamber ignition system, Raptor 1 was overall instrumented out the wazoo because it was always a developmental (as in: brand new) design, and a great deal of the plumbing and wires which festoonws it were for instrumentation, not control. Now that said instrumentation has given them a thorough understanding of the design's behavior, all of the instrumentation which is not absolutely required for feedback inputs to the control system is no longer necessary.

@jakewastaken 11 месяцев назад

@@railgap This is a good point. I don’t build rocket engines, but I do futz about with microcontroller projects. The Raptor 1 strikes me almost as more of a development board package that grossly introduced complexity for the sake of documentation and rapid experimentation. It’s wild how much they were able to strip away once they got down to the “chip” component, in terms of this metaphor. It’s like they were able to lose the breakout board finally.

@jamesterry1927 19 дней назад

I love listening to Elon. A guy with resources most of us couldn’t fathom yet he’s so down to earth. Much respect that he knows so much about everything he does. Of course he has loads of intelligent people working for him but he could literally chill on a yacht for the rest of his life, instead he’s always working 😊

@rocketman48 Год назад

brilliant interview and i love his down to earth description of the process and your knowledge Tim much appreciated Bill in Ireland.

@coding-is-fun101 Месяц назад

you mean his down to Mars description..

@gregzsidisin Год назад

FYI: the area under a Thrust vs. Time curve already has a name. It's "Total Impulse". Any model rocketeer will be familiar with the term, because the solid rocket motors they use are rated by Itot. A-class motors provide up to 2.5 Newton-seconds, B motor, up to 5 Ns. Each letter doubles the maximum total impulse. Hobby / sport motors go up to O class, with a maximum Itot of 40,960 Ns.

@kidcasco1966 Год назад

i was a little saddened that Elon couldn't easily grasp he was talking about momentum.

@CATinBOOTS81 Год назад

As expected, it's just the integral of the function 😁

@gregzsidisin Год назад

Liquid rocket operations don't naturally lend themselves to the concept as solids, and Musk was speaking of the top of his head. But even Super Heavy and Starship have a total impulse consideration. That is, they have limited propellant stocks, so there is a maximum total impulse each stage can provide. And to his salient point: specific impulse varies at least somewhat in any solid or liquid engine due to a variety of factors, particularly chamber pressure. Taking a total impulse value (e.g. Ns) and dividing by the *weight* of the propellant (e.g. N) gives you an average Isp in seconds over the interval.

@OregonCrow Год назад

Nope.

@anonymous12345678935 Год назад

I would think if you took it further then you would have to consider the total impulse for the mission profile since efficiencies will change with outside pressure.

@vmpgsc Год назад

Elon: I can't talk about anything you can't see on the Raptor 2 Also Elon: Talks about things you can't see on the Raptor 2 Great video, Tim. Thanks for giving us this amazing insight into the bleeding edge of spaceflight technologies and processes.

@user-lv7ph7hs7l Год назад

...Anyway so we use swirl injector. I gasped.

@masternobody1896 Год назад

find a problem find a solution to that problem - elon musk

@MrDmadness Год назад

Yup, he's literally not qualified at all to be talking about the subject.. hes no genius, just one as far as image creation ..

@MrDmadness Год назад

@@michaellost7338 yup.

@alxz3707 Год назад

@@MrDmadness sure, he definitely is not a genius. But is that required to be talking about Raptor?

@Luckydog1159 Год назад

I could tell that aerospikes were a thing Elon has a guard on. They are so far into testing and production that the inclusion of a double chamber with aerospike combo could be a great thing to lookinto but he and his team are so close with their current iteration of the Raptor engine that looking into new concepts would be like taking a step back in production, and given the current timetable he has had planned for Mars, it not a risk he willing to take based on written theory not tested and executed. Elon has so much on his shoulders at stake. I'm sure during moments of relaxation hes thinking about what you've said and it might be something years down the line to look into when the Raptor is at it's plateau or peak performance. Still a wonderful thing to discuss with him!

@lylewilkinson5706 Год назад

What an amazing person. The stuff he knows and the engineering he is all over it.

@jorelldye4346 5 месяцев назад

He spends most of his time engineering. All of the business and marketing stuff is left to others.

@christopherhogue3680 Год назад

One of my favorite things about the Elon interviews is that the engineers and other workers pay no attention to Elon. He’s clearly working there all the time, as they seem to treat him as just another guy on the job

@Keneo1 Год назад

Or they are scared to interact with him because the big boss is on the floor?

@bigdogboos1 Год назад

@@Keneo1 not at all

@OneBiasedOpinion 11 месяцев назад

@@Keneo1 I know what that looks like from personal experience. They’re not scared of him at all.

@RubMyBackWhesker 11 месяцев назад

@@Keneo1 scared of what lmao I’ve never seen a video with him being a jerk to him employees

@inthefade 3 месяца назад

@@Keneo1 Even in the Tesla offices his desk is right there with everyone else; It is just a slightly larger cubicle. At least that is how it was several years ago. He doesn't separate himself from his employees.

@meowcat64 Год назад

I know you chose the name "everyday" to highlight the fact that you're just an every day guy. But lately I feel like you've learned so much and have pursued so much space and rocket knowledge that it feels like you're well on your way to becoming an expert and would be a valuable asset at a rocketry start up company. Your channel is great proof that anything is possible if you're passionate and willing to focus on it every day.

@rigomrtz Год назад

Well said, I was just thinking back to Tim's videos from couple of years ago. Where our knowledge was at least similar.

@takanara7 Год назад

Yeah it's really interesting.

@Bakinowskiaaron Год назад

And didn’t it all start with a soviet spacesuit he bought on ebay and a trip across Europe kind of as a joke?

@Slaat1 Год назад

"and would be a valuable asset at a rocketry start up company." Understanding a technology and doing R&D are two different pair of shoes.

@louskunt9798 Год назад

I made my own pop tarts for breakfast this morning. 🤷‍♂️😂🤣✌️

@fernandohood5542 11 месяцев назад

The man takes time out to share knowledge. You must be well respected.

@daneiten1 Год назад

I believe that these videos will someday be of great historical importance. Like the Apollo documentaries.

@ancientastronut9915 Год назад

As always, Tim, excellent content. You've become quite the researcher and interviewer. Thanks so much for getting so many people interested in Space again.

@duroxkilo Год назад

he did acquire knowledge and that's going to serve him well in interviewing but let's keep it honest, a researcher is something else :}

@ancientastronut9915 Год назад

@@duroxkilo Oh, stop nit picking. Tim does tons of research into every video he produces. I'm as proud of him as a brother.

@duroxkilo Год назад

@@ancientastronut9915 i guess you're right in that sense of the word and i did state my admiration for his efforts :} but let's stick to the meaning of words since we're dealing w/ knowledge/learning. it's safer that way. we're calling Elon an engineer and Tim a researcher for what reason? let's keep it real, it's simpler that way

@aaronjennings8385 5 месяцев назад

Aerospike engines are a type of rocket engine design that offers certain advantages over traditional bell-shaped rocket nozzles. Instead of a bell-shaped nozzle, aerospike engines have a unique shape that resembles an inverted cone or spike, hence the name "aerospike." The key advantage of aerospike engines is their ability to maintain efficient thrust at a range of altitudes. Traditional bell-shaped nozzles are optimized for a specific altitude, resulting in decreased efficiency at other altitudes. In contrast, aerospike engines adapt to varying atmospheric pressure by automatically adjusting their nozzle shape, allowing them to maintain optimal performance over a wider range of altitudes. Aerospike engines work based on the principle of aerodynamic expansion. As the rocket ascends, the decreasing atmospheric pressure causes the exhaust gases to expand. The shape of the aerospike nozzle adjusts to match the changing pressure, ensuring that the exhaust gases are optimally expanded for efficient thrust. Another advantage of aerospike engines is their potential for weight savings. The design eliminates the need for a heavy and complex bell-shaped nozzle, reducing the overall weight of the engine. This weight reduction can lead to increased payload capacity or fuel efficiency. However, despite their advantages, aerospike engines have not yet been widely adopted for space missions. They present engineering challenges and complexities, and their performance benefits in real-world applications have not been fully realized. Nonetheless, aerospike engines remain an area of ongoing research and development in the field of rocket propulsion.

@sonya2916 11 месяцев назад

Thank you for this! Elon is awesome You are all awesome. This is important even for those like myself who didnt get much of an education who just love information and love to observe genius in others..To recognise it and feel pure love for it is a bliss in itself. 🎉

@irrefudiate Год назад

Tim Dodd has been there from day one, jumping around in his old cosmonaut spacesuit, and eventually interviewing every heavy hitter in the rocket business. It was his interview with Elon Musk at the Mark-1 presser that convinced me he was going for broke.

@aldunlop4622 Год назад

Hell yeah, I’ve been following Tim from the start, his constant passion has led him to this spot. So happy for him.

@asraharrison Год назад

I really hate talking to idiots, who think Elon is a businessman trying to screw everyone! He blows my mind in every interview! He is on top of every aspect of SpaceX projects... and I can only assume all others. So THANKS to Tim Dodd for this fantastic "unplugged" style interview. Tim, you do amazing work and continue to improve with every vid! Elon, you continue to astound me with your distruptive technology in every area you touch... Reusable boosters, electric cars, Starlink, nuralink, etc.... Elon is single-handedly usherings us into a new world!

@Coyote27981 Год назад

I was watching the video and thinking the same thing. He speaks like an engineer, not a manager who memorized a report. And he knows every detail, thats why he can give this kind of interview, no need to have a set of prechecked questions.

@markedward4290 Год назад

EXACTLY! The next person who starts down that path with me is gonna get it. lol

@joshlewis575 Год назад

@@Coyote27981 u really think this wasn't scripted? U really think people can learn rocket engineering in their spare time? Gimme a break on both fronts

@ParkerUAS Год назад

@@joshlewis575 You are a troll. If you have a passion for something, you will pursue it and get the knowledge. Elon actually went and got an Aerospace Engineering degree. Not an honorary degree, an actual credit hours required for degree kind. Go troll somewhere else.

@mickeymestel2563 Год назад

I have learned rocket science in my spare time, almost all by watching videos like this. I probably know close to as much as Tim does, thanks to his help, and could have conducted a similar interview if I was with Elon.

@Huer2004 5 месяцев назад

how friendly he is, even in an interview or talking to strangers on the street 🙏🏻

@a.mie.533 5 месяцев назад

I've not the slightest idea about that subject matter - but it is endlessly fascinating to listen... and Elon even seems to enjoy the interaction ...

@a.mie.533 4 месяца назад

@@ElonReevemusk-cs8dn 🤣 Oh, thanks Mr. Musk for taking the time to answer my comment in person - despite having a workload of supposedly 70 hours per week. I really appreciate that... 😜

@pskupferman Год назад

The interview with Elon blew my mind. I spent my whole career on Space Shuttle. Just listening to his technical genius blows my mind.

@philanthropicnightmare1206 Год назад

Redditors: "He'S nOt a rOcKeT eXpeRt"

@maheshprabhu Год назад

@@philanthropicnightmare1206 Musk has a PhD in physics so it's obvious that he can pick up technical specs. But, don't confuse a person who understands how it works with someone who solves such engineering problems on a daily basis. Musk is here only for PR for the company. His technical contribution to the spaceX project is zero.

@marcusmason3440 Год назад

Space shuttle was awesome.

@ThunderAppeal Год назад

Sweeping the floors at the space center does not make you a rocket expert douche bag.

@davidstinger1134 Год назад

@@philanthropicnightmare1206 Redditors are prime example of a midwit. Emotional unstable and irrational people who pretend to spout facts when all they do is try to make their wishful thinking sound scientifically accurate.

@WilliamSurles Год назад

Not just summarizing content, but making content! Thanks!

@armaansayed692 Год назад

bro....

@juggerswood 8 месяцев назад

Send me some to.

@wesleyfortney2339 Год назад

Nice motors! Massive steps forward you're making. Wow

@athul164 Год назад

we need some values on the x axis for the integrated force curve - thx :) awesome video as usual :)

@jagdson2701 Год назад

It's impressive and inspiring to see how quickly SpaceX has gone from practically hand-crafting rocket engine parts to producing dozens of the latest model.

@ecohen2010 Год назад

Elon's time spent learning how to mass produce Teslas is now going to pay huge dividends as he solves how to mass produce Starships.

@jasonblack6142 Год назад

Yeah I wonder how many of the team including musk are awakened

@dewiz9596 Год назад

Kudos to Tim for asking the kinds of questions that Elon feels are worth answering. Just so much brilliance on display here!

@avinash87 Год назад

Here on Saturday morning 7 am... Good start to the weekend!

@user-cw6tr8me1h Год назад

Hey mate!👆Thanks for watching. Tell expert Andrei jikh that you were referred by me for the right strategy on this profitable investment project to participate on it. Msg direct 👆✍️.

@matthewperry5524 Год назад

I love how Elon gets so happy about talking about there designs sounds like old time race car mechanics or just mechanics that just built a 500-1500 hp race motor & car & know every part in it.

@victorbellew3759 Год назад

It just makes me so happy to see what’s happening at SpaceX, it feels good to have hope for humanity. So many things happening that make you think our divisive society is headed for destruction but this stuff seems to transcend that idea and brings people with so many differing viewpoints together for a common goal.

@teem5642 Год назад

I don't know about hope for humanity bit, I don't see how this brings hope for humanity exactly, maybe if you explain your reasons

@DirtFlyer Год назад

"Hope for humanity"??? I guess if when you say "humanity" you mean "billionaires", and when you say "hope" you mean "a spaceship to escape a planet collapsing from a billionaire-induced climate catastrophe", then I can understand where you are coming from.

@ThreepwoodFan Год назад

@@DirtFlyer what an incredible stupid take. Same as saying the wright brothers only wanted a way for rich people to escape to other continents. Elon makes Space travel more and more accessible for everyone in the long run.

@HaloForgeUltra Год назад

@@teem5642 Without Space exploration, humanity is doomed to die on Earth, either from killing each other, running out of resources, or an unexpected extinction event.

@marielizysurourcq Год назад

@@ThreepwoodFan "in the long run, we are all dead" (from heat)

@hectorquezada1331 Год назад

Notice how he's not a narcissist he always says we we we. Genius and humble 👌

@jfh9209 Год назад

Thanks, I'll try to remember to say "we we we" and not "me me me"!!!

@denislemelin7653 Год назад

Crazy difference between the R1 and the R2 , the reduction in hard ware is dramatic !

@exteriorized Год назад

Awesome interview! BTW, some people might at first viewing interviews with Elon my think that because he sometimes stutters or halts darning interviews. It is not that his mind is flawed in any way, on the contrary his mind thinks and (thinks) runs 2x the speed of the average person and so he is having to slow down to articulate his thoughts as he obviously knows his stuff!

@dmeemd7787 Год назад

I love how great your content is and I love that I've watched from the beginning and seeing you go from photography and everything to where you're at now, truly awesome and even though I don't know you personally, definitely proud to see the progress and how many people you inspire with your content! And that's a huge understatement in every sense of that paragraph LOL

@jeronimocaceresguido282 Год назад

37:53 it is called Total Impulse. Actually in some atmospheric operational rockets is much much efficient to increase thrust even if you reduce ips because you increase total impulse you gane in DeltaV.

@YourMJK Год назад

Yeah, since force is defined as the rate of change of momentum (F = dp/dt), the area under the F-t curve (integral of F over time) is just the change in moment aka. an impulse: _∫F*dt = ∫dp = Δp = J_ (or _Imp_ or _I_ or whatever symbol you fancy)

@angryrat7882 Год назад

I like the idea of calling it the, force field. 😅

@ariedityaprdh Год назад

And the first thing that came up to my mind is StarTrek's Impulse Engine 😅

@Steven-cr8ju 9 месяцев назад

That Elon says he watched your video at a friend's house is huge.

@aaronjennings8385 5 месяцев назад

Head, end, and throat cooling in thrusters is a cooling technique specifically used in rocket engines to prevent overheating and ensure optimal performance. Thrusters generate a significant amount of heat during operation, and cooling systems are crucial to maintain the integrity of the engine components and prevent damage. In the context of rocket engines, head, end, and throat refer to specific sections of the combustion chamber and nozzle: 1. Head cooling: The head region refers to the upper part of the combustion chamber. It is typically exposed to the highest temperatures and pressure. Cooling channels or regenerative cooling systems are often incorporated into the head section to circulate a coolant, such as liquid fuel or cryogenic propellants, to absorb heat and prevent the chamber wall from overheating. 2. End cooling: The end region refers to the lower part of the combustion chamber, near the nozzle exit. It is also exposed to high temperatures and pressure. Cooling techniques such as film cooling or regenerative cooling can be employed in this section to cool the chamber walls and protect them from the intense heat generated by the combustion process. 3. Throat cooling: The throat is the narrowest part of the combustion chamber, located between the head and end regions. It is subjected to extremely high temperatures and high-velocity gases. Cooling methods, such as film cooling or impingement cooling, may be employed in the throat area to remove excess heat and prevent damage to the chamber walls. The primary goal of head, end, and throat cooling in thrusters is to maintain the structural integrity of the engine components and prevent thermal degradation. By implementing effective cooling techniques in these critical areas, rocket engines can operate at high temperatures and pressures without compromising their performance or risking catastrophic failure. It's important to note that the specific cooling methods used in thrusters can vary depending on the design and type of rocket engine. Engineers carefully consider factors such as the propellant type, operating conditions, and material properties to design efficient cooling systems that can withstand the extreme conditions of space exploration or other propulsion applications.

@ianmilham7397 Год назад

Huge improvement in Fiddlybits reduction from 1 to 2. Nice job SpaceX!

@xxxdiresaintxxx Год назад

This is a really cool bit of knowledge. My thanks to Tim and Elon for doing these videos.

@warrenwhite9085 Год назад

Elon Musk & Space demonstrate the genius of private enterprise.. innovative, efficient, spirited, altruistic, result oriented. Bill Nelson & NASA reveal the corruption of government. Deceitful, wasteful, incompetent, uncaring, irresponsible, political.

@EdgeofEarthParamotor 5 месяцев назад

Thank you to Elon for being in this video. When it comes to mixing fuels could ultrasound or resonance be utilized?

@GeorgeBonez 4 месяца назад

Wow, we all watch the rocket launches & landings and we see the nozzles pitch and compensate but it really changes your perspective when you realize the entire engines are moving.

@Isbjoern42 Год назад

Thanks Tim for all you've done so far and looking ever forward to what's coming next

@EverydayAstronaut Год назад

Thanks so much! I appreciate it!

@masternobody1896 Год назад

@@EverydayAstronaut find a problem find a solution to problem - elon musk

@masternobody1896 Год назад

@@EverydayAstronaut tell elon musk to use coca cola or co2. unlimited rocket fuel

@axedyson Год назад

Hello fellow dane

@regrettablelifechoices5494 Год назад

@@masternobody1896 loll not one piece

@miltdanfoss Год назад

Amazing to see how much Tim had learned. Most of this was beyond him at first, then as he has done educational video after video, he is showing very advanced understanding in his questions and comments! Way to go Tim!

@beatenieen5447 Месяц назад

Love ur dokus. Makes me so tired.. If I cant sleep (and of course my Highspeed data volume is high enough) I watch this.. (only because of his whistle

@alexandermartel8344 Год назад

The more I look at it the more i'm starting to be convinced that the Raptor is going to be perhaps the limit of what traditional rocket motors can achieve. From here Nuclear Salt rockets, etc. Will start taking the forefront, assuming all goes well on SpaceX's part of course. This is extremely exciting nonetheless and I can't wait to see how much further we can push Chemical rocket engines.

@OneBiasedOpinion 11 месяцев назад

We’re gonna have to find different methods of lift eventually. I think the most likely fast-pass method to get into orbit from Earth’s surface is going to be space elevators, but that’ll take decades for us to achieve.

@donjones4719 Год назад

Congratulations, Tim, on another of the best interviews of Elon anywhere. Your style works very well: ask a question and then let a conversation flow and let Elon talk and wander where he likes. He certainly enjoys geeking out over rocket engines with a fellow enthusiast - your self-education in rocket engines has sure paid off!

@dinizen Год назад

i remember when i really didn't like you Tim and look at you now. How could one not like you, your knowledgeable, meaningful, respectful and non-intrusive questions, your kind nature and your quality videos.. i wish you best of luck and thank you for bringing this historical footage to our screens.

@aaronjennings8385 5 месяцев назад

Ullage gas refers to the gas or empty space within a rocket or spacecraft's propellant tank. In a rocket engine, propellant is stored in tanks, and as the propellant is consumed during thrust, the remaining empty space in the tank needs to be filled with a gas to maintain pressure and prevent the tank from collapsing. This gas is known as ullage gas. The purpose of ullage gas is to ensure that the propellant is delivered properly to the engine. It helps to maintain a consistent flow of propellant by exerting pressure on the remaining liquid fuel or oxidizer, preventing vaporization or cavitation that could disrupt the engine's performance. Ullage gas is typically inert, such as nitrogen or helium, and is often used in combination with a pressurization system to maintain the desired pressure in the propellant tank. Overall, ullage gas plays a crucial role in ensuring the proper functioning and stability of rocket engines by maintaining pressure and facilitating the flow of propellant.

@EngiTrek Год назад

The integral of the force vs time curve is the total impulse. This is actually very tricky to calculate, because force measurements can be very noisy. When integrating noisy data, it can overestimate the actual performance and can require filtering. This leads to the next conundrum as the integration can become very sensitive to the filtering frequency. So even that figure of merit, as simple as it’s stated, is very complicated.

@ThePimp4dawin Год назад

Really love this, Musk is surprisingly good at explaining tricky concepts. Very entertaining and incredible that we can get such an up-close view of SpaceX operations.

@richardzee8994 Год назад

It takes a comprehensive understanding of a subject to phrase difficult concepts in a way that is comprehensible to the layman. Elon Musk is credited for his business acumen, but the man is a genius as much intellectually as he is in the world of business.

@teem5642 Год назад

@@richardzee8994 I actually find that he struggles to explain a lot of times his concepts. It's not really about explaining to the laymen, as most that watch him aren't really clueless about this subject. Has he ever told you that he speaks like this so that laymen can understand, or you've made up a theory and just gone with it until you started believing it yourself?

@retinaquester Год назад

@@teem5642 I agree with you that he is not a great speaker to listen to. He is perfect in his way of phrasing (technically) however it make a stakkato kind of speech. Never the less his stuff and knowledge is amazing, and I think his concepts are worth listening to.

@bomi18 Год назад

Albert Einstein supposedly said if you can’t explain something simply you don’t understand it well enough. Elon musk is the lead designer and engineer that’s basics of course you can explain tricky concepts.

@duroxkilo Год назад

@@retinaquester what do you mean 'not a great speaker'? he;s simply terrible and i;m not referring to the babbling or whatever speech impediment he has..

@GillesSoulet Год назад

Amazing to see Elon discussing all the technical details of what is probably one of the most complex piece of engineering ever made by a human... How many CEOs can do that ?

@raymaster Год назад

the scam artist at his best huh?

@SteveCatLover Год назад

wish hed stick with doing more of this instead of schitzo twitter rants and backing out of 44 billion dollar acquisitions.

@CrazedGamer117 Год назад

@hoodio Год назад

@@raymaster he doesn't do any illegal stuff and if people wanna buy a 150k car, it's their fault, people buy million dollar cars

@hoodio Год назад

you can really tell how he understands this stuff incredibly well

@bryans5150 Год назад

Fantastic content as usual Sir. Thanks much for free education and completely fascinating insight on a topic I've missed since being a child with my first ESTAS rocket kit. Truly many thanks.looking forward to seeing the next.

@LABTESTED Месяц назад

A totally amazing man , people like this come along once in a lifetime and how special to share this era with him

@Steelers2121 Год назад

Mr. Musk is more knowledgeable than most think. This man may literally be a real-life Tony stark . Love these videos. I learned a lot as an aspiring space engineer. We need annual updates on his thought process lol

@arresthillary9502 Год назад

i think we need hourly updates on his thoughts

@puffns Год назад

"The raptor architecture is the highest effeciency known to physics. We should be able to get 99% combustion effeciency. 99% of combustion effeciency… with devine intervention you could do 1% better." Speechless! Elon so closely watches your video that he was able to catch an error on a value of a table full of numbers! Again, speechless!

@phillipzx3754 Год назад

People can say all they want about Elon. But one thing they can't complain about is his 100% acceptance of an outside opinion. I've watched as Elon soaked in a conversation (with Tim about hot/cold thrusters) like a dry sponge as if the "Everyday Astronaut" was an equal part of the SpaceX team. That's something sorely lacking in most of corporate America.

@stephendenagy3396 Год назад

Absolutely! Executives of America-watch and learn! No room for arrogance, for anyone!

@_PatrickO Год назад

@@phillipzx3754 The negatives are just fud fueled by negative media paid for by competitors. It sounds conspiracyish, but its not. It is simple. News networks try to avoid negative news about advertisers and go gangbusters on non-advertisers. This is the basic problem with ad supported media. RU-vid gets around it by being as strong as it is (monopoly), they can force advertisers to bite their tongues because there are no alternatives for them to reach as large of an audience. The latest attack on elon's "co-worker" is a baseless smear. Every kid he had is via IVF. He likely screens out genetic diseases that way. It looks like she acted as a paid surrogate, yet the media just lies about it.

@spaceorbust6636 Год назад

@@phillipzx3754 Is that the video where Elon realized that Starship should also use cold gas thrusters or something?

@phillipzx3754 Год назад

@@spaceorbust6636 Sounds about right. Elon and Tim were just sitting there chewing the fat and Tim says something (way over my head) to Elon. Elon sits there for a bit (you could tell the gears were turning) and says to Tim something like "That's a good idea. We need to look into that," or words close to that. :-) I about fell off my chair. 😀

@peter_0093 Год назад

I feel lucky knowing Everyday Astronaut. The content is not only educational but also inspiring.🚀

@coltonmaas Год назад

You should watch a few "educative" videos on the English language. Could prove to be 'educational' 😝😝

@bastadimasta Год назад

The channel is good except for the Musk fanboyhood.

@peter_0093 Год назад

@@coltonmaas Thanks, i will see about this. So far seems good to me.

@Intellistan Год назад

**lucky we're alive at the same time as Elon.

@nabormendonca5742 Год назад

Triggered? 😏

@obsidianwing Год назад

Impressive to see and hear Musk in a such nerdy excited state , finaly seeing him as a human being talking about technical stuff he likes

@jeffreystockdale8292 2 месяца назад

28:15 cavitations harmful effects are when the bubble collapses and subsequent pressure wave. at a given temperature the pressure drops below saturation pressure, locally, at propeller blades creating "steam bubbles" then when the pressure returns (anywhere away from the blades) the "steaam bubbles" collapse due to the rising back above saturation pressure for given temp. from what I remember from the NAVY.

@RandyRawgust Год назад

The production quality is so good, this is peak educational programming stuff right here. Thank you so much for all the hard work to you and your crew.

@thespacepeacock Год назад

Kudos to you and Elon explaining the quirks of the Raptor engine so well to us, Tim! If it were not for these interviews, we would never have known what specifically changed from Raptor 1 to Raptor 2. Also great to get some insight on what they are still planning to improve for a possible Raptor 3!

@jackg2630 Год назад

I love how casual all the employees are about Elon being there. Just shows he’s probably there helping all the time

@scottwilson6467 Год назад

To be on a first name basis with Elon Musk as his starbase showing you in great detail how his raptor engines work means youre doing something right in life - well done Tim this is a great achievement with your RU-vid channel haha !

@user-en3oo5gb8h Год назад

Hey mate!👆Thanks for watching. Tell expert Andrei jikh that you were referred by me for the right strategy on this profitable investment project to participate on it.Msg direct 👆✍️ .

@jim8574 Год назад

These interviews are great for staying up-to-date with SpaceX. It's also gives us an up close view on SpaceX assembly line. Thanks

@k2_robotics Год назад

Great!! Thanks Tim for bring to us such a serie of videos, the images and the data we learn are gold!!

@jinu4811 Год назад

Elon's T shirt lol "OCCUPY MARS🏀"

@angelasilveria6259 Месяц назад

I could listen to Elon’s technical engineer jargon all day long. Intelligence is so refreshing these days.

@mitseraffej5812 Год назад

28:16 “Weird that a bubble can erode metal” Happens on boat propellers. I think the damage occurs when the bubble collapses.

@TheSilmarillian Год назад

Yep was going to add that to my comment but read the comments first

@brianorca Год назад

Cavitation is a vacuum bubble, which means it has a huge pressure differential inside and outside the bubble. (And even more so in a high pressure pump.) By the time it collapses, the fluid is moving very fast towards the center, so it hits hard at the end of the collapse.

@2KOOLURATOOLGaming Год назад

It's finally here!! Thank you Tim for all of these in-depth videos, they've really consolidated my amateur rocket knowledge and made me feel competent, hopefully on the right side of dunning-kruger.

@alexv3357 Год назад

You're fine as far as Dunning-Kruger goes so long as you don't try to actually design a rocket engine for yourself

@markoconnell804 11 месяцев назад

In listening the the blade causing cavitation bubbles why not use the new propellers which are designed to eliminate cavitation in boat props. That may help - Sharrow props 29:26

@abigailandino6251 Год назад

These are great interviews and tours

@luha8715 Год назад

One thing thats facinating about Elon is the fact that for every complex problem he has a easy to understand analogy. To the average person, this could indicate that Elon reasons from analogy, but of course the opposite is true. So he makes it easy to understand with analogies, but never ever thinks like them.

@zagreus5773 Год назад

Amazing! Where do you get these mind reading capabilities?

@_asantesana_squashbanana_ Год назад

Insightful observation. Of course, it can only be confirmed by the man himself, but I believe your reasoning is sound and I completely agree. He also has aspergers. I do too. I use analogies often to help those around me understand the gist of what I am saying, without getting into specifics of a topic they have no interest or even ability to comprehend. There are many kinds of intelligence and everyone is intelligent at their own thing and I respect that. Those who are particularly studious tend to be lacking socially. Not always, but often. Personally I much prefer books, animals and nature to people and their frivolous, nonsensical, tedious social games. Often cruel to minorities, like aspies. Diversity has a lot to offer. If in doubt, see the results of a shallow genetic pool. Lol. There is a whole universe out there, filled with many more things far superior in intrigue than the superficial dramas and everyday gossip in mainstream media. Just my perspective ✌

@luha8715 Год назад

@@_asantesana_squashbanana_ wow, thanks for the insight!

@trittandon Год назад

Not a lot of CEO can discuss a product with this kind of detail.

@nateferguson4612 Год назад

Let alone discussing his “side project” while running Tesla!

@blueskies1237 Год назад

safe to there is only one, and you are looking at him.

@chrisquinn8150 Год назад

The most successful companies only have CEOs that can or they soon lose their value. Look at apples history and you can already see they're sorely missing Jobs.

@Yungtskt Год назад

Hes a rocket engineer not just a ceo.

@jarretta2656 Год назад

To be fair alot of engineering companies that are in early phases have really really technical CEOs. It doesn't really work well otherwise. Take for example rocket lab, relativity space, many techy startups, etc.

@ArtemAleksashkin 6 месяцев назад

That's great that he allow you to walk there and ask questions

@SammyB-Habebe 5 месяцев назад

I like how humble and super smart he is. Lots of respect!

@DroneMee Год назад

Just a ridiculous amount of quality rocket engineering conversation. This series is exactly what the community needed during this lull in Star Ship activity. Thank You Tim and Elon!

@tambo4444 Год назад

Watching this as a rocket engine noob but loving every moment! Love Elon and Tim doing a smashing job making all of this accessible for everyone.

@anshenlv6548 Год назад

Before ,we thought this kind of project was operated by whole nation .Now ,he showed us nothing is impossible ,he is the man that will change the planet and human destiny

@ingot95 Месяц назад

Taking people to Mars is Elon Musk's mission and you can be critical about it as to whether mankind needs that journey, with all the issues at home. However, "side projects" on the way are Tesla, Starlink, and X. And again, you can think about these what you want. Point is, this guy makes history by pushing technology forward, he is an accelerator and will be remembered for that. So, he deserves an interview partner like Tim and vice versa, they are both so deeply into the science and fascination for tech, it's a beautiful thing to see. Small minds talk about people, average minds about events, and great minds about ideas.