Dynamic Prop Balancing.

[Pete Somers]

Paul
I think that you should have had the props removed and in a prop shop for a static balance first. Then carried out a dynamic balance on a known good prop, but it does sound like the readings were wrong and the weights wrong (easy to do)

Regards
Pete

[tropical]

Typically a prop not in static balance will not balance dynamically. Every time you place a solution weight the clock angle/IPS will change, but not go down. When I did dynamic balances I always started with a questionare on the airplane. You can have the props dead on balanced but a bad engine mount will create havoc. Magnetos, ignition leads, plugs, etc can also affect vibration levels.

Also track is something very few mechanics ever check when installing props. The prop and spinner can be balanced but if not in track will create some interesting vibration.