Will it take off?
 

A plane is standing on a runway that can move (some sort of band conveyer). The plane moves in one direction, while the conveyer moves in the opposite direction. This conveyer has a control system that tracks the plane speed and tunes the speed of the conveyer to be exactly the same (but in opposite direction).

will it float?

They all... FLOAT

http://www.gyseren.dk/billeder/Pennywise.jpg

uhhh unless there's a strong breeze, there's just going to be wheels turning