Quote Originally Posted by Liftoff View Post
and got this idea of a compact planetary gearbox which could stay inside a wheel. ..have to think about this some more, put it into writing and make some sketches before I forget.
Will explain myself better when I get a clearer idea myself of what I'm talking about!
Skyfall uses that idea, as well Firestarter (Dutch Feather using Astroflight motors). And that's the current feathers.

Project One and Two used the same idea a decade ago.