I stand corrected & thank you for the support.
Here is the bottom bracket drive mounted on a very lightweight Giant frame. it looks large in this photo, but thats a 6374 in there. Its running on 8cells.
the batteries & ellectronics are now mounted inside the frame also , this photo was the "Hurry up & lets try it out" configuration.
batteries & controller are too far apart. The finalize the design was tweeked to house all the reduction internaly except the chain to the crank of course, but have never revisited it. something allways comes up.
As far as a skirt bearing required....definatly not. they are needed for a friction drive to stablize the can & on a larger motor that is going to subject to jumping or substantial impact force. the skirt bearing came form the 3D aero guys. the gyroscopic force of a propeller & the airframe stressing it from all angles would let the can flex enough to have magnet strikes.....especialy on the long can style motors.
& yes this same unit as a BB drive. I am thinking a lower kv wind & a bit lower voltage & you have a resaonable assist to the human side of the bicycle. It won't be a braggerts 10kw set up....but thrugh the gears, it will do everything you want a bicycle to do. & the biggest plus is the ease of maintaining a 6cell set up over chaining a pack in series...then parallelling them up for capacity.