quite possibly a cat wrote:I don't think there is any indication anything except for the wedges and spider drive is "reactionless" though. Even those are actually pushing on the hyperwall. True reactionless engines break the concept of energy.
Isn't the mass driver reactionless? The weight of the missiles in a pod exceed the pod's weight; but they are accelerated up to speed before they can get wedges up, not the pod. I thought the pulser used a variant of that.