Space/Science — HabitableZone

Space/Science » in reply to SpaceX Falcon 9

re: SpaceX Falcon 9

21,000Ibs to LEO?

Using hydrazine + nitrogen tetroxide hypergolic propellant [Isp (vac): > 320 seconds],
21,000 Ibs in LEO might consist of 13,000Ibs propellant and 8,000Ibs hardware...
A mass ratio that would allow for a manned moon mission with a Gemini-class spacecraft.

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