WhiningKhan
Regular
It's rather the imbalance in mass decrease rate I guess, but I'm not a rocket expert and not sure how it really works. All I know is that the solid fuel rockets need the rotation.
Err... I'm really no rocket scientist either, but are you sure they _require_ rotation? Using common sense, one would think that solid fuel does not have the ability to dampen the movements of the rocket, so that as the fuel is being expended, asymmetricities would _lead_ to rotation, and as such the rotation might not really be a desired effect but something that just needs to be taken into account.
But I remember having heard of liquid fuel rockets using rotation for supplying the fuel to the engine.
And then again, I might be talking out of my ass here.