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A comment on Propelling deep space flight with new fuel source, Momentus prepares for liftoff. Parent comment

Re:Propelling deep space flight with new fuel source, Moment... by scrumper on Monday July 23, 2018 @01:35PM (#17594311)
Why would you want to store your propellant water separately as O2 and H rather than as water? You'd have to react it to turn it into water, water is pretty inert, there's no mass advantage (more of a problem than volume). What am I missing?
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Re:Propelling deep space flight with new fuel source, Moment... by nkrisc on Monday July 23, 2018 @02:40PM (#17594810)
I was thinking of volume, but if the craft doesn't need to ever be in an atmosphere then that wouldn't be an issue as I had first thought.
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Re:Propelling deep space flight with new fuel source, Moment... by pavel_lishin on Monday July 23, 2018 @04:31PM (#17595719)
A bigger volume might even be an advantage - easier to turn your ship if you can mount engines far from the center of mass. Plus, built in shielding.
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