[Spaceships] FWIW: Semi-Hard Science Boost Drive

[johndallman]

Originally Posted by DaltonS

This drive is a Reactionless Engine (SS1:p24) that directly converts fuel mass into directional kinetic energy

Have you read the old Venus Equilateral stories? They had a drive that was a large vacuum tube that converted the mass of its cathode directly into kinetic energy. The setting was limited to the Solar System, but ships cruised around happily at 1G or more.