REFLECTOR: Vibration.

[Kurt Winker]

Looking for input. Engine ran fine w-out the prop. Started it with the prop....wicked vibration. 
Took prop off.. Vibration gone. 
Sent prop back to IVO....1-blade was 1-gram out of balance.  They corrected & returned. 
Since I noticed that, when viewed from the side, the blade disk tracking seemed to move for & aft when you looked at the top of the disk. 
When I got the blades back, I reassembled & reinstalled. Then I checked the blade tracking. Was off a tad, and I corrected that. Also checked the blade angle with a protractor, and all seemed good. 
Looking for things to check. 
Engine: 4.3l- V6 90-degree engine... 
Belt drive reduction unit:  1.7:1 ratio.
76"- 3-blade. 

The fact that the blade track for-aft seems to change, really gets my attention. 
Changing RPM doesn't help...the vibration increases in frequency with rpm, but no better or worse.
Changing the prop pitch has no effect. 

All else is well.... Hope I can figure this part out. 

View from the side:   http://m.youtube.com/watch?v=Nr-KLXgco38. 


Kurt 

Sent from my iPad
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