Engine balance
Fly paper, there is nothing wrong about what you said. Everything is right on.
But the original point was about floating (counterweights) on a radial Wright R2600 airplane engine. They were actually a balance ring simular to the balance shaft in the modern day auto engines. I have several Dodge cars and they all have two shafts down in the oil pan that are driven off the crankshaft that are used to dampen hormonics at certain rpms. The shafts resemble camshafts but they don't do anything but spin. There is actually nothing that floats on them. They just turn at a different rpm than the crankshaft to cancel hormonics. These Dodge engines have no harmonic balancer on the nose of the crankshaft. I know about the fluid filled and also the rubber mounted harmonic balancers that people buy for their hot rod chevys and fords but this is a slightly different principle.
Enjoy,
Jim