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Aug
29
comment What is the possibility of a railgun assisted orbital launch?
@MikeDunlavey, no, not the thrust-to-weight ratio. The ratio of how much electrical power would be needed to create a magnetic field strong enough to move the object ( as there is a limited distance ). Doing a bit of research, I didn't find anything. I think a bigger problem would actually be the amount of g-forces applied to the structure ( unless we don't care about launching humans ).
Aug
29
comment What is the possibility of a railgun assisted orbital launch?
IIRC, the problem is the energy required per mass of the object. It's not a linear equation, but an exponential one. The higher the mass, the much higher energy needed to power the thing.
Jul
12
comment Flow of liquid among branches
@RonMaimon - OP said nothing about pressure. Though your answer is more complete, I fear it may be too complicated ( though it is well detailed and far more complete ).