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Everyday Astronaut Apr 18
Why did the RS-25 go dual shaft / dual preburner design? It seems like having your fuel-rich preburner next to a LOX pump caused a heck of a head ache in making a crazy seal... so why didn't they go with a common shaft like most other engines?
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Elon Musk Apr 18
๐Ÿš€ propellant grade kerosene (basically, jet fuel) & liquid oxygen are close, but H2 & O2 are not
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Everyday Astronaut Apr 18
Replying to @elonmusk @DJSnM and 2 others
So how does the RL-10 get away with just a single preburner? Is that what the gearbox is for, to step up the pump speed? I think I'm FINALLY grasping this stuff, and the more I learn, the more I appreciate the crazyyyy engineering behind rocket engines ๐Ÿคฏ I ๐Ÿ–ค Rocket scientists
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Ernesto Arigita Apr 18
Don't forget RL-10 has a different engine cycle! It may have to pump both fuel and oxi like any other engine, but it hasn't got a single preburner anywhere and gets the pumping power from the heat taken off the engine with the H2 cooling loop. Neat trick, but limited in thrust.
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Everyday Astronaut Apr 18
Replying to @rune_ea @elonmusk and 3 others
Oh crap. I forgot. Itโ€™s the expander cycle isnโ€™t it ๐Ÿคฆโ€โ™‚๏ธ I wonder how the RS-27 does it. Time to look that thing up
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Scott Manley Apr 19
There's links that can be drawn, it's more like venn diagrams. I know the physics better than a lot of the history.
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Everyday Astronaut Apr 19
Replying to @torybruno @DJSnM and 4 others
Woah this is super cool!!! That sure does have a lot on there, but I'll bet that gets wild if you try and track ALL OF THE ENGINES through out history. That'd be a mess ๐Ÿ˜„
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G C Apr 19
Replying to @torybruno @DJSnM and 5 others
Sweet diagram, Tory! Thanks much!! ๐Ÿ‘๐Ÿผ๐Ÿ˜๐Ÿค“๐Ÿ‘๐Ÿผ
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Tory Bruno Apr 19
Anytime
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Mike Marriage Apr 19
Probably not. If intelligent design were a thing then why so many rockets that don't make the grade.
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1LP Apr 19
Replying to @torybruno @DJSnM and 5 others
Donโ€™t suppose you would know where a wall poster with this diagram is available? Asking for a friend.
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Tory Bruno Apr 19
Rocketry is evolutionary
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Tory Bruno Apr 19
There might be a hi-res version on our website. If not, email corporate.communications@ulalaunch.com. Tell them I sent you.
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Scott Manley Apr 19
Itโ€™s a nice diagram, but itโ€™s missing the Thor-Delta evolution
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Tory Bruno Apr 19
Replying to @DJSnM @MikeM_UK_ and 4 others
My paper was only so big. ;)
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Joe McKirdy Apr 19
Replying to @torybruno @DJSnM and 6 others
Where is the Delta II workhorse.
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Everyday Astronaut Apr 19
Immaculate conception.
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Dan Apr 19
Replying to @torybruno @DJSnM and 5 others
Did you whip this upbon the spot or did you have it laying around?
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Connor Dufault Apr 19
Replying to @torybruno @DJSnM and 5 others
Considering this only goes up to 2013 I assume itโ€™s from back then.
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