ORIGINAL: The Toolman
I've got the same plane that makes the same noise you are talking about. I've flew it with that noise well over 100 times. It always happens in a high speed nose down atitude. Everybody said it was bad flutter. Well it isn't, its the front nose cheeks vibrating against the big long aluminum motor mount on that particular plane.
Ronnie
Which I would immediately correct so as not to happen again because...
- It may mask the sound of real flutter.
- It indicates excessive vibration of a part
- It will cause excessive wear of the cowling
Do you have anti-vibration mounting in place on your cowling? e.g. the tubing over the screws, etc.?