pic: BCRDrive- everything Nonadrive does, except comparable!

[JesseK]

This may actually be feasible if pneumatic wheels were used instead of standard traction wheels. Traction wheels would lose to much traction if tilted in that manner. Pneumatic wheels are rounded; so it's just a matter of finding the right pairs of wheel sizes that will only contact the ground when it's desired.

On field, the rotation joints would take a beating. I almost want to say they'd have to be made out of steel or solid aluminum blocks.

Also, when designing this type of drive train in CAD, account for the fact that most of the time the bumpers cannot tilt or raise/lower outside of their specified zones. Thus an outer frame would be needed that connects to the inner frame.

Great idea, I think.