Centrifugal force acting on the top of the lower weight
Centrifugal force is absolutely critical. The John Device uses a flat weight so, it has little down-force. The Skinner device uses a tall weight. The centrifugal force translates to downforce against the bottom arm. It isn't just gravity that is pulling / pushing the end of the arm down. The load (resistance to rotation) is effectively trying to make the weight climb up. The taller the weight, the more leverage against the lower arm. The higher the rpm, the more centrifugal force is being converted to downforce. As the lower weight spins up to speed, it exerts ever-more downforce against the end of the lowest arm.
The top of the lower rod is pushing up against a ramp. The lower weight is pushing down to stay at the bottom of the ramp.
The upper part is pretty much a compounding device.
Centrifugal force is absolutely critical. The John Device uses a flat weight so, it has little down-force. The Skinner device uses a tall weight. The centrifugal force translates to downforce against the bottom arm. It isn't just gravity that is pulling / pushing the end of the arm down. The load (resistance to rotation) is effectively trying to make the weight climb up. The taller the weight, the more leverage against the lower arm. The higher the rpm, the more centrifugal force is being converted to downforce. As the lower weight spins up to speed, it exerts ever-more downforce against the end of the lowest arm.
The top of the lower rod is pushing up against a ramp. The lower weight is pushing down to stay at the bottom of the ramp.
The upper part is pretty much a compounding device.
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