Reactionless drive ships orbital flight in 3rd ed physics?

[Fred Brackin]

Originally Posted by evilDictatorInTraining

The distinction between deep space ship and planetary body launch capable is useful for a reason.
I would suggest either one ship have multiple types of engines (one engine with high thrust for lifting off planetary bodies and another with high/unlimited efficiency for long range space travel).
Or more realistically splitting those into two ships.
A shuttle to take you into orbit and a pure space craft (powered by your reactionless drive) to take you quickly to other planets.

If available superscience isn't useful for getting into orbit there may not be that much up there even if there is a low-thrust reactionless drive available once you're there.