I have an B-29 foam electric plane I bought early in the summer. It flys via 2 channel RC, on 4 electric motors........and very well indeed.
The plane "steers" through thrust differential, meaning when you want to turn, you press the toggle switch to the direction you to go, and the opposite side engines speed up, turning the plan.......!
To climb, just give it more throttle, to decend, less throttle. The engines are tilted downward a good 10 degrees at least, and force the wing to have lift. But if left in full throttle, it climbs so steep after a while it will stall, so ya gotta be careful.
Best $50 worth of fun I ever got!
Anyways, I just bought another one, and plan on taking the first ones engines, etc, and maybe modifying the B-17 to utilize them, or try on a smaller 2 engine model.
The foam B-29 is quite a big heavier than one would think, and I know none of the Guillows would come close to being as heavy, so I think it has a good chance of working out!