Quote:
Originally Posted by ecomodded
I would mount the motor on the bike and tow the batteries. It just seems like you would have much better control / steering.
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This.
Jeff, any deviation in the trailer's center of thrust, including differences of traction, will try to push the rear wheel off-track. Powering the cart with one motor would mean a differential is necessary. By the time all is said and done, you would be better off having built (or bought) a badass e-bike with additional battery capacity in the trailer, as Ecomodded suggested.
edit: I'm not saying it can't be done, but. You would need traction control of some sort to make it safe.