Larry, the feathering mechanism works by magic!
Unless you have one in your hands, it`s quite difficult to understand…..Whoever designed it, deserves a medal!

The main paddlewheel rotates on an axle………Obviously…….cough!
The feather mechanism coloured orange, rotates on it`s own axle……..Not shown on photo for clarity and is located off the sponson. This axle is set 6mm forward of the main paddlewheel
Both paddlewheel and feather mech rotate together ……………and this is the magic bit……..One spoke is solid……..The horizontal one on the right………This one spoke is what creates the strange movement of the floats.
It`s intention is to ensure that the floats entering or leaving the water in a vertical attitude….`ish!
If you can understand that…..You`re a better man than I am!
You can ask me any question………..Bob