liveforphysics said:
No differentials works great. It's a nice way to save wasting a bunch of power at cruise from churning oil.
Hub motor on all four wheels. Electric motors aren't driving at constant speed, they are driving at constant torque (OK really a torque curve but that's beside the point. would be about constant through a short curve). Turn, and both motors are still applying torque, even if one is going slower. The only use of a differential is to drive more than one wheel with one motor, but with electrics, it would be better to drive each independantly.
I'm using 2WD on a tadpole trike, the principle works there as well.