I'm no expert and I fully expect Shazaam to pop up and work this out but doesn't it depend upon the relative weight of the wheel (and tyre) moving forward compared to the two discs that are moving backwards (adjusting for the larger diameter). There might be some power loss as the friction from the gears will be higher than from bearings in a standard wheel but that would be an acceleration issue not a steering one. Not that long ago powered flight was thought to be impossible. |