Comment Re:Solar? (Score 1) 122
The summary unnecessarily confuses things. It starts talking about launcher engines, while the real subject is an in-space low-thrust ion engine.
Ion engines run for months on end at low thrust but high efficiency, so the acceleration adds up when you are going, say, from one planet to another. They are not useful for launching anything to orbit.
Ion engines run for months on end at low thrust but high efficiency, so the acceleration adds up when you are going, say, from one planet to another. They are not useful for launching anything to orbit.
