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

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

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

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

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

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.

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

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

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

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 😜

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

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

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

Curious Marc and Curious Tim! Match made in Heaven!

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

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

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

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.

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

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

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

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

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

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

Apollo rockets powered by goats. What a novel idea 🥸

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

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

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.

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

Everybody gangsta till he pulls out RD-170

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

This is one of my favourite things on KZfaq now.

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.

I am seriously missing Scott Manly in this video

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

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

Super cool

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.

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

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

3 Minutes ago? My body is ready

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

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?

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 " 😁 👍👍👍❤❤❤

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.

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!

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.

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.

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.

Nice

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

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

Love the game-show SFX

This people is more interesting than celebrities

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

Fire it up!

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

TIL: Goat veterinarians are rocket scientists

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

Goat plumbing, indeed! :-D

The goat analogy cracked me up!

Awesome vid 😎🤙🚀

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.

...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

CROSSOVER YESS!

Nice turbo.

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

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

haha this is awesome!

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

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

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

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?

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

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

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

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

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

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

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)

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

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

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

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

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

Is the 6:1 ratio by weight or volume?

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

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

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...

Maybe Elon could let you poke around on a Raptor like this. Now THAT's a complicated engine!

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.

What parts are the mounting points of the engine?

Til goat science is like rocket science

This is basically a mini rs-25

Come on guys it's not like its rocket science.... lol

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.

Where is this museum?

Where is this museum???

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