It is very probable that gravity could be bypassed and so the motion/movement that lifts the weight might/could be used directly to push the wheel forward instead of just lifting the weights. It seems very logical that Bessler's early wheels may have used weights lifted that then turned the wheels. This was probably somewhat of a carry over from Bessler's searching fo an unbalanced wheel. Then as Bessler learned more about his principle he may have soon realized that he could use the principle to directly push the wheel. Thus his later wheels were always balanced gravity wise, while being unbalanced torque wise when rotating.
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