I think somewhere in this sci.space archive of rocketry usenet wonders is a quote along the lines of "Rocket science is just extreme plumbing". Cryogenics with

I think somewhere in this sci.space archive of rocketry usenet wonders is a quote along the lines of "Rocket science is just extreme plumbing". Cryogenics with powerful oxidizers is hard! https://yarchive.net/space/index.html https://yarchive.net/space/index.html