[Spaceships] Real Life Non-Super Science Reactionless Engines

[scc]

From this news article: http://www.wired.co.uk/news/archive/...le-space-drive

For those who don't want to read it, there is are reproducible proof that specific microwaves inside a closed vessel will produce thrust.

Based upon statements in the article about using it on satellites I'd give it the same thrust as an Ion Drive system. TL would be 9, but we COULD make microwaves as far back as WW2, so it could possibly be built earlier then that