[Draconious]

You cant get free energy, the effort to make power would be more than the power you made...

example (that I tried just for the heck of it..


4aaa cells hooked to
130 motor (like Xmod but mine ws Mini-z)
the motor shaft of this motor was hooked to another motor... wich was then connected to my volt meter...

it took 6 volts from those 4 cells to make about 2 or 3 volts pop up out of the other motor...

its not enough to bother with extra weight or mechanical drag... which would slow the car down 100x more than anything you would gain out of it (which would be basicly no gain).