Prop Balancer ??

[JohnJMoran@aol.com]

In the L.E.A.F. and Lockwood Catalogs there is an item the appears to be a 
dynamic prop balancer. It looks like a disk with with what I assume to be a 
tubular outer ring partially filled with a liquid. It mounts on the 912 prop 
hub and the propeller is mounted on top of it. The principal appears to be 
like a washing machine balance compensation ring which used water in a ring 
to compensate for unbalanced loads during the spin cycle.

Has anyone tried this gadget?  Results?

John       A044