Steve Jurvetson’s Space Collection Part 3: Everyday Astronaut figures out the RL-10 Rocket Engine

[@AsbestosMuffins]

Marc looks at spaghetti wiring and logic diagram for some random piece of electronics "This makes sense." Marc looks at a rocket "Goat."

[@bar04z]

Arguably, it's also the G.O.A.T!

[@thiesenf]

@@bar04z Docm77???

[@warlockd]

What makes it worst is when he flips between the two a few times it does haha. Wait, how does he know what a goat insides look like?

[@Hiperruimteindustriee]

It's what you're knowledgeable about, I can explain reasonably complicated orbital trajectories (thanks to Kerbal), my biology orientated classmate, not so much.

[@alexandervonzoller-sakharo6386]

time index 07:24 That is a venturi tube. It is the pre-combustion stage expander

[@terry6131]

'Bigger farts' - I had to pause to stop laughing as I was missing too much.

[@craigson153]

lol was it farts or force?

[@graemedavidson499]

Wonder how many goats would it take to match the thrust of an RL10….

[@Fake_Blood]

This series is like a get together of my favourite tech youtubers.

[@robertjung8929]

you made my day with the comparison to goat's digestive tract, i couldn't stop laughing :D

[@arjovenzia]

Being a fan of both Tim Dodd and Scott Manley, I had a pretty good Idea how the RL-10 worked. I had no idea about goats tho, although it doesn't surprise me. there's not much those fellas wont have a munch on. awesome to see ya'll just geek out on a real one tho.

[@theannoyedmrfloyd3998]

After all that discussion about the rocket engine, I expect a test firing in the near future.

[@jull1234]

Curious Marc and Curious Tim! Match made in Heaven!

[@NoLandMandi]

what a nice guy Steve Jurvetson is! sharing his interest with everyone!

[@acmefixer1]

Our planetarium used to have a rocket engine about that size in the lobby. I was amazed by how much intricate plumbing it had. Thanks for the great video, Marc.

[@MrHichammohsen1]

Marc we can't thank you enough! Please get scott manley and unleash him on that store!

[@agenericaccount3935]

Just quite pleased that Mr. Jurvetson is so open with his collection. *hands-on* open. Super accommodating.

[@wolfydelaforet]

Wow Marc + Tim I'm so happy to see that !

[@Kasnblack]

Nice to see Tim on this channel, love both your channels!

[@poowey]

Wow! What a cross-over episode, Everyday Astronaut, Scott Manley mention AND Curious Marc!!!😳😁

[@MarcelHuguenin]

This is such a great video guys, I love this get together. And Marc, the scoring with the check marks and the sounds, that was awesome. I enjoyed it very much. Scott should have been present though 😜

[@nigeljames6017]

Children with a new toy ! (I was envious that I could not be there !).

[@Sharklops]

6:50 - so is that pretty much like when you put your thumb over the end of a water hose to make it spray harder?

[@9rune5]

Yes. So the next time you are horsing around with your water hose, exhibit some care so you don't end up in spaaaace! :)

[@framegrace1]

Yeah, it's just a venturi (rocket necks are really venturis). They interchange pressure for speed. Is also how carburetors and paint guns work, the neck has a very low pressure (Because it has been converted to speed) that can be used to suck liquids.

[@gazorbo.]

The most awesomest and genuinest 1st time reaction videos on KZbin ;)

[@izzieb]

Engine. Goat. Engine. Goat. Please make goats a running gag on your channel. Thank you.

[@jtveg]

So awesome! 🚀 Thanks so much for sharing. 😎👌🏼

[@therichieboy]

This is one of my favourite things on KZbin now.

[@bborkzilla]

At 1:19 you can see a Ford Model T spark coil on the RL-10! Talk about longevity of design!

[@sheep1ewe]

Thank You this was clearly one of my personal favorite episodes! I had felt like a little child on the Christmas day in that museum! ha ha

[@douro20]

The LE-9 engines which have been developed for the H-III rocket are expander cycle engines, but they use an expander bleed cycle where the hydrogen used to drive the pumps is dumped overboard after it is used rather than passed back into the combustion chamber. They are the largest expander cycle engines ever built.

[@davidkennedy3050]

From my relatively safe location, I see absolutely no downside to lighting that engine. It's only rocket science!

[@thiesenf]

What could possibly go wrong???

[@tomschmidt381]

Fun listening to folks trying to figure out engine plumbing, without cheating by using the internet. Got a chuckle when I saw the model T spark coil at 1:15.

[@SidneyCritic]

That small rocket engine 0:33 looks like it was hand welded, ie, you can see the stops and starts. I thought at minium they would've used a motorised rotator for a more continious weld.

[@jurvetson]

The gold one is from Mariner, the welded one was *flown* by Neil Armstrong! And Gene Cernan, Jim Lovell, Alan Sheppard and John Young. It's from LLTV 952

[@electrofan7180]

It's impressive what results you can get pumping hydrogen and oxygen into a goat☻

[@kubeek]

and making it eat a spark plug :D

[@BenDeSwert666]

Big farts that make you go woosh real fast 😂

[@Adrian-qk2fn]

Just make sure you don't stand anywhere near it when it farts!

[@acar3615]

If the place still exists, you should go down to Norton Aerospace props and sales in North Hollywood. It was kinda spiraling the drain the last time I was there two years ago. I was looking for real switches and dials for a KSP controller. Go the extra mile.

[@CuriousMarc]

Wow that is quite a place!

[@acar3615]

@@CuriousMarc kinda the same story as the Apollo guidance computer. The original owner bought all the stuff from nasa and spend a lifetime selling it. I wish I could have seen it in its heyday.

[@TheOddVideoChannel]

Perfect timing, I just ran out of KZbin to watch!

[@markkrutzmann6862]

Oh how envious I am! Also, keep the music.

[@johnfinn1570]

Apollo rockets powered by goats. What a novel idea 🥸

[@PjotrStroganov]

I genuinely clicked this video expecting it to be a everyday astronaut vid and was surprised to hear curiousmarc narating.

[@vivekskumar21]

I am seriously missing Scott Manly in this video

[@jimurrata6785]

Scott Manley is seriously missing fondling an actual RL10 rocket motor.

[@WitoldWitkowski]

How do these engines need to be prepared to be ITAR compliant?

[@bar04z]

Right? I was a little surprised they showed the injector in this video.

[@Muonium1]

@@bar04z well it's in a museum sooooo, it's not like they expect the visitors to comply to some obscure arms regulation thing. it only applies to companies and manufacturers.

[@bar04z]

@@Muonium1 Injectors are usually removed from museum rocket engines. AIUI that's often because people are being over-cautious about state department enforcement (no warning, and little recourse), rather than a strict interpretation of the law, though.

[@aserta]

Rocket engines are actually pretty simple. It's the supporting cast that's complicated.

[@paulkocyla1343]

The engine goat analogy let me roll on the floor :-D

[@mikewasowski1411]

Super cool

[@teslakovalaborator]

Everybody gangsta till he pulls out RD-170

[@ReubenHorner]

3 Minutes ago? My body is ready

[@johndododoe1411]

On display rocket engines should have those informative arrow stickers that plumbers put in boiler rooms: Cold water flows that way in this pipe etc.

[@miroslavmagyar515]

Please, what is the name of that melody at the beginning?

[@reneschmitz4845]

It's the tetris theme! Aka Korobeiniki

[@74HC138]

Given that the running engine heats the hydrogen, which in turn provides the energy to turn the pumps - which is fine when the engine is already running and red hot, how do you actually cold start this thing? Is the pressure differential between the fuel tanks and the atmosphere enough to get sufficient combustion to eventually get stuff hot enough to spin the turbopumps and bring the power up?

[@namibjDerEchte]

Should be; the heat flux through the walls is fairly independent of exhaust velocity, and the later is what you need the high pressure from the pumps for.

[@user-si5fm8ql3c]

The engine is already hot enough to start up, the hydrogen during operation doesnt heat up much beyond room temp anyway.

[@bingosunnoon9341]

Is the 6:1 ratio by weight or volume?

[@davidcreegan952]

Awesome vid 😎🤙🚀

[@seldoon_nemar]

you can see that the expansion bell in the plumbing is critical. it has one of the few sensors in the plumbing flow (there is [what I'm guessing is] a thermocouple or pyrometer on the inside edge of the pipe

[@stopthephilosophicalzombie9017]

AgentJayZ would be impressed at the lockwire job on those pumps.

[@sixstringedthing]

I know he's a jet turbine guy, but I'm sure he'd absolutely love everything about this!

[@ovalteen4404]

Love the game-show SFX

[@nostromons6325]

Interesting to look at the RL-10. Any rocket engine is the highest technical work of hundreds of engineers! And it's nice when Russia is respected, Tim Dodd in a T-shirt with the inscription "Seven", greetings to him with respect!

[@L4JP]

Tim is in the finals stages of preparing a "deep dive" video about Russian engines. He keeps saying it's coming out soon, so you can look forward to that (as I am - I'm not Russian, but I love all of Tim's deep dive videos).

[@RadiantPhenom]

What parts are the mounting points of the engine?

[@CuriousMarc]

You can see them around 1:06. The main attach point is the very top of the engine, you can see the articulated gimbal joint. And there is a bracket for the gimbal actuator underneath the engine, on the side of the bell.

[@richardperritt]

How is this channel not at 1+ million subscribers? 🤷‍♂️ This channel resonates with my inner geek (okay, with my outer one too). Electronics, computers, space. Every time I see there's a new CuriousMarc video you can picture me reacting the same as Homer Simpson when he sees a donut: "Mmmm, CuriousMarc video " 😁 👍👍👍❤❤❤

[@jerrymuncey4136]

I love the technical knowledge this channels has at its arsenal and we get the (GOAT) engine theory... of FARTS! I about F-ing died that was so funny.

[@WeBeGood06]

That was Fun, Thanks, A few checks and X's seem to be wrong. 6:23 Check, Tim is Correct, it is part of the Throttle and is a fixed Office, providing a fixed amount of Mass flow. The Hot Hydrogen Gas is at Mach = 1 at the throat, for a given pressure, no more mass may flow. Mass flow for a given pressure, XXXXX not Pressure Regulator. 6:48 XXXXX, Not sure, but, Not Supersonic. It's Subsonic flow on both sides of the Choke (Mach 1 at the Throat). The Nozzle sets the mass flow. The Turbine Bi-Pass Valve sets the Pressure by adding or subtracting power to the compressors. Keeping the flow Subsonic after the Throat recovers pressure, supersonic flow would increase temperature but not recover as much pressure to run the turbine. Let me know if he allows you to run the engine. It would be fun to try to give it back in one piece.

[@SubTroppo]

It reminds me somehow of car yards here in Brisbane, Australia when I arrived a decade and a half ago. For me the peculiarity was that the bonnets (hoods) of the new cars for sale were open so that the engines bays could be inspected by customers. What could be gleaned from such an inspection, I have no idea, as technology by that time had moved on to such an extent that the average punter could have not made a decision on the evidence that met their eyes. Perhaps decisions were made on the surface quality of the plastics on display.

[@sixstringedthing]

Imagine being an automotive engineer and really proud of the latest engine design your team worked on, and then the marketing department says "we don't want to see all that ugly crap, can't we hide it all under a sleek-looking plastic cover? We'll put the logo and some WankTec buzzwords on it, it'll look great!" 😆

[@MrRobbyvent]

The only part I understood was that goat thing...

[@jarrodvsinclair]

Where is this museum?

[@jurvetson]

Future Ventures HQ. Here is a photoblog of artifacts on display: www.flickr.com/photos/jurvetson/albums/72157623704246792

[@f.d.6667]

The goat analogy cracked me up!

[@FrancSchiphorst]

TIL: Goat veterinarians are rocket scientists

[@zapfanzapfan]

A goat with metal intestines farting water vapor... ok, got it! :-)

[@miladirani4313]

This people is more interesting than celebrities

[@damientonkin]

People often misuse the term "rocket science". The science is easy, the engineering is hard.

[@BrokenLifeCycle]

Science is usually harder. Engineering to use the science is a mixed bag. Sometimes it is well known enough that you can refer to a chart or some equations to get about 90%ish of the way there and then handle the rest of the stuff through high factors of safety, tests, and adjustments. Sometimes, it's something so new that you need the original scientists to tell you what it's NOT supposed to do.

[@alanrickett2537]

Engineers are underrated, if it's written down it's science if it does something then a engineer worked on it at some point. "Scientists turns money into ideas a Engineer turns ideas into money"

[@jonnyj.]

@@BrokenLifeCycle You clearly missed the point of his comment. The science of rocket science is already EXTREMELY well understood and piss easy in comparison to the engineering. There's a reason people still havent flown with humans using a full flow staged cycle engine, even though the science was already perfected in the late 60's by the soviets. Also the same reason the james webb still hasnt launched, even though the science behind it has completed development more than a decade ago at this point. Engineering has to be one of the most underrated jobs in all of humanity...

[@ClayBellBrews]

Nice

[@owenwilkinson4991]

The Tetris theme playing at the start is from the Macintosh version of Tetris invade anyone was wondering

[@seasong7655]

would be cool to do some 3D scans of it, and rebuild one. Idk if it's copyrighted.

[@74HC138]

Copyrights don't apply to things like this, it's patents that would apply, and any patent on this engine or its components would have expired decades ago at this point.

[@seasong7655]

@@74HC138 True, but it seems there is also some time limit for patents to expire similar to copyrights. I think it's 20 years for the US, so this engine could be legally copied.

haha this is awesome!

[@brianrvd]

Nobody is interested in the Ford Model T style wooden buzz coil on the top?

[@carlclaunch793]

good eye

[@brianrvd]

@@carlclaunch793 I'm more into antique gas engines than rocket engines.

[@jurvetson]

good eye. That's exactly right. It was added by a Pratt & Whitney employee to pull off a stunt. It drives a spark plug up in the top center of the fuel injector plate. So... when the engine in in the horizontal position (big blue swivel allows that), people inevitably stick their head up in the bell (like cats go into paper bags), and then you can flip a switch and make it spark inside.

[@brianrvd]

@@jurvetson Ok, so it's not flight hardware then. I was pretty surprised to see it.

[@mikem5043]

Where is this museum???

[@qclod]

Tim's R-7 shirt is so damn cool.

[@QuanrumPresence]

All my fav youtubers in one video! This is like WWE royal rumble for kids :D

[@johno9507]

I wonder how much thrust a goat produces if you light its...um...tail pipe?

[@bengelman2600]

CROSSOVER YESS!

[@ReneSchickbauer]

Isn't it strange that you can post a video of technical details of a working rocket engine on the net, but even just hinting on how a guidance algorithm for a rocket works gets you in ITAR trouble? Especially, when those algorithms are pretty similar to what open source drones use and there are lot of textbooks on all the equations you need for every type of rocketry problem... (And you can buy working but outdated guidance computers on the internet if you have lots of money)

[@mikeburch2998]

After the goat comparison, everything made much more sense. :-)

[@sagnhill]

Are you guys going to strap that engine to the top of a 1963 Impala?

[@sixstringedthing]

This gave me a chuckle. Old classic.

[@slobdog21]

Love it! There's got to be a better way!

[@brianbarefootburns3521]

This one gets a thumbs-up just for the intro!

[@Brian-L]

Given the number of minds trying to figure this out, it must be rocket science.

[@brianhiles8164]

So, it _does_ take a rocket scientist to understand... a rocket engine? That, or a goat! _Baaah!_

[@johankotze42]

Goat plumbing, indeed! :-D

[@Jeroensgambling]

Nice turbo.

[@rztrzt]

Fire it up!

[@edgeeffect]

Many more KZbin cross-overs gathered together in one place and they'll collapse into a black hole. :) :) :) :) :) :) :) :) :) Tim's Семёрка T-shirt is DELICIOUS!

[@JonWhitton]

When you going to start the engine?

[@BilisNegra]

I dug the idea that humungous farts have taken us into space traveling, really. That was hilarious pedagogy at work.

[@tackyinbention6248]

Should we send this video to the everyday astronaut and see what his reaction is like?

[@seldoon_nemar]

...I just paused this at 2:52 and came back after listening to dune for a while and thought it was a sand worm for a second

[@NeilABliss]

Need a couple propulsion engineers on your team. Let get that thing fired up.

[@misium]

If the square-cube law is the limit for the maximum output (because it uses the area of the bell to expand the fuel), why not just make engines like that with multiple nozzles for each large pump etc...

[@user-si5fm8ql3c]

The best way to increase output now is to use more unconventional combustion chamber shapes. The Vinci engine for example has a elongated combustion chamber to increase power

[@hectorquezada1331]

Rockets seem so ancient idk is it just me? Maybe antimatter engines will be better

[@user-si5fm8ql3c]

All the basics were figured out by the 60's, the most efficient engine is from the 70's, all research nowadays is to make it cheaper and increase power. Antimatter wont be used for the next 100 years at least, we have not even produced a single milligram, what will come before is fission engines, or fusion (if we figure it out).

[@mrpicky1868]

rl-10 is one of the more expensive engines to have on your collection))

[@Thisandthat8908]

Scott Manley is overated. He never explained a Goat! Also i absolutely LOVE the (Space..) music in old space documanetaries. They probably thought this is what we would listen to in the future.... Instead, we are still using their engine 60 years later.

[@reneeshtr1]

I foresee a Raptor there after few years....wow

[@Consequator]

Me 5 minutes into this video; Next week on CuriousMarc, Marc builds a rocket control unit out of breadboards and fires a rocket engine out of his garage.

[@neilshep50]

Come on Marc, it's not rocket science. Oh, it is!

[@Branroolz]

We essentially put man on the moon with a carburetor..Crazy.

[@BlackEpyon]

I've said it before, and I'll say it again. Any time I hear somebody say "we couldn't build one of these now, we don't know how," I tell them not to underestimate the capabilities of nerds.

[@user2C47]

Also, we don't _need_ to build one of those now. It's an outdated design. You can just buy a more efficient engine from Blue Origin for cheaper.

[@CuriousMarc]

@@user2C47 Still built and flown today! Not outdated, and I believe still one of the most, or even the most efficient engine.

[@yuvalyeru]

Space Collection Part 4: Test firing the RL-10?

[@jaybrooks1098]

Imagine each engine was technically unique.. every engine had to be tweaked to function properly because of imperfections during manufacturing

[@Tekenduis98]

How does one acquire a complete rocket engine!!?

[@twotone3070]

There's a bloke down Camdem Market knocks 'em out.

[@Sharklops]

Have to get to the garage sale reeeeaallly early

[@cogoid]

It is very unusual to own such an engine -- this may be the only one in a private collection. Steve bought it from a former employee of Pratt&Whitney (the company which made it). Why the employee had the engine in his possession is not quite clear, but presumably this was a display item and at some point it was written off, and the employee was allowed to keep it. It costs $38M new.

[@MLX1401]

start of video: why do hi-end speakers always look so weird end of video: ok now I understand why they so costly