Too Fast· Premium Member
2021 M6 Shaker RT
Correct. At some point in that rotation, the crank throw stops moving up, or down.Not according to what I was taught in geometry. For the velocity of the piston to become zero would require there be point on the crank journal that had a shape that allowed the piston to become stationary while the crank could continue to rotate.
Or another way of looking at this would be viewing the rod journal as the crank rotated there would have to be point the stopped moving.
Pretty simple, and obvious, really.
Since the piston is connected via the connecting rod, it also stops so it can reverse rotation. Why are you arguing that it never stops?
I think you are confusing crankshaft rotation with vertical piston movement. The piston must stop moving, the crank never does.