Hello Steve
>From my experience I can only offer three possibilities. My first
experience with engine vibration was from a spinner that was about to depart
the engine by way of taking a chunk out of my prop. After it departed the
engine returned to smooth. It was very violent. Second, was the cracked
blades in the IVO prop. The vibration from that was more settle. One could
even question if it really happened. I reduced speed and the vibration went
away. Third, was a loose trim tab. With the loose tab, the vibration was
in the stick as opposed to the airframe. It started slowly and became more
pronounced as the structure of the tab deteriorated. Had I continued to fly
the tab would have departed the aircraft.
Hope this info helps.
Orma
Southfield, MI
N110LR Tweety, old enough to drink this year
Flying and more flying, to the gathering or bust
http://www.kr-2.aviation-mechanics.com/
