/sci/ - Science & Math

>322s Isp hypergolic monster
>to be used in a 6x configuration in the first stage of the UR700 150 tonner
>Burning good old N2O4 / UDMH
>+42s of additional Isp when using the immensely toxic Pentaborane instead of UDMH
>cancelled with the N1
Why did the soviets never have funding for the good things?

>>12670033
What would it take to go to Russia or China and cut a deal with Roscosmos to dust off the plans for the RD-270 and start working on a proper Starship/Superheavy competitor?

Split-second engine reignition for the flip maneuver and suicide burn would be an absolute non-issue with a UDMH/N2O4 engine, and since the fuel would be ambient temperature and pressure, your spaceframe would only need to be simple aluminum construction which the Russian or Chinese aerospace industries should be more than up for building you.

Also, given the far higher propellant density and the far higher thrust of the RD-270 relative to the Raptor, a rough copy of the Starship design with 3 engines should have a proportionally smaller percentage of its volume dedicated to fuel while having roughly 3x Starship's payload to orbit. It would be a squatter design that has fineness more along the lines of 18m Starship. On-orbit refuelling should also be a cinch as the Russians have been doing hypergolic fuel transfers since the Salyut days and the only thing that would change is the size of the plumbing.

>>11082271
It’s funny when you hear people talk about how amazing Raptor is, when you consider the Soviets successfully built (not so much tested) an F1-class FFSC engine with 261 bar chamber pressure. According to most sources the testing failed because the Soviets couldn’t solve the engine’s combustion instability problems.