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Tuesday, 21 October 2014


The 3 second average may be 8.5, but the peak could be over 11.

True enough; that'd be the "wildly nonuniform" thing. I suppose it might make sense to design the motor for extra thrust right at the beginning, for a quick getaway.
Or... hm. We know the Δv, and may guess that the ISP is around that for APCP (call it 220 "seconds"; I hate that unit). That means, for a 222 m/s total boost, the mass of the capsule + rocket system will decrease by roughly 10% during the burn, so with constant thrust the acceleration will indeed vary significantly, peaking right at the end.

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