Guy,
Here are three things to check in addition to the one you
already mentioned (Prop balance).
1. Check the torque on the firewall to engine mount bolts (40-42 lb
ft?). Fuselage vibration is enhanced as these bolts loosen over time (should be
checked each annual). Also, make sure that no more than three threads
show on these and engine to mount bolts as they might be torqued to the
bolt shoulder if more than three show (the mount itself could shake).
2. Aileron rigging - If the ailerons are riding in a neutral dead band they
can wander a bit. Clamp the stick and wiggle an aileron to check the slop in the
linkage. If you feel that there is too much you might consider
rigging both ailerons slightly up so there is a wee load on both of
them.
3. Wing bolt torque - When on solid jacks, wiggle a wing tip up and down to
see if there is any movement (this is not a perfect test). But you may
want to consider the torque on the safety wired wing bolts (a real pain for the
bolts in the wheel well).
Scott Krueger
In a message dated 10/21/2010 10:10:08 P.M. Central Daylight Time,
guyjill01@hotmail.com writes:
I was
hoping someone might be able to help me on an aileron shake I have on my 360
(0-360 engine). I bought this plane from the west cost 11 months ago. I flew
the plane for 15min, and have been fixing problems ever since. I flew the
plane today for the first time and I still have a shake on the ailerons in
both cruz, & climb. I checked to insure the ailerons were counter
balanced, and they were. Mags retimed, new fine wire plugs, new intake gaskets
& hoses, compressions checked. I was wondering if this could be
caused by an out of balanced prop? Any suggestions on were to go from
here?
Thanks,
Guy
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