vibration

[dfcpac]

iv'e recently changed ny 7aca from a a 65 to a c85 and put a metal prop on. i noticed a full power rpms 2575, my wing truts get a vibration in them more on the right side then left. when i throttle back to 2300 2400 rpms it goes away. is this the metal prop causing vibration?

thank you
dan carley

[MikeB]

Dan,
Maybe the prop wash?? Although I don't know why metal would have been different than wood.....but stranger things have happened. Usually it seem I feel a vibration more in my feet or the seat of my pants .

MikeB

[dfcpac]

mike
only happens at full throttle. just the wing struts vibrate. throttle back to 2400 smooth. gotta check my tac maybe overspeeding.

dan

[jc pacquin]

It MIGHT be the prop. Is it new, used? Might pay to have a good prop shop check it out and balance it. My Champ, 85hp with a McCauley did not do what you describe. JP

[dfcpac]

talked to americian champ. dale the test pilot comfirmend it is prop horminics. just try to stay out of that rpm range if possible

dan carley