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edgraydallas
Joined: 13 Jun 2008
Posts: 74
Location: Dallas, Tx
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 Posted: Tue Jun 29, 2010 9:07 pm Post subject: flutter |
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Recently while flying my Kitfox II 582 I encountered flaperon flutter and want any information related to that. I was making steep turns on a gusty hot day. As I rolled out, the stick started shaking and I could see the flaperons oscillate about 8-10 times per second. The flutter was transmitted thru the controls to the other side. The outer wing was flapping like a bird. I reduced power and slowed down and the flutter stopped. I have the standard bobweights installed on the outer ends as plans call for.
Anyone else experienced this? I was making about 60 mph when it happened. There is no noticeable slack in the controls, and the flaps are not loose on the shaft.
Ed Gray KII 582 Dallas do not archive
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mcrutchlow(at)hughes.net
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| Posted: Wed Jun 30, 2010 5:25 am Post subject: flutter |
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Ed, I had a similar problem with my Kitfox II 582. It happened when I encountered updrafts at the edge of a cliff. I did 2 things to stop the flutter. I went through the many links in the flaperon system and took out all of the slop. It was a very small amount of slop but still there. The second thing and I think the most important thing I did was make new bearing halves at the turtledeck/fuselage joint where the flaperon shaft exits the fuselage. I haven't had any flutter since.
Mike Crutchlow
Simcoe
Kitfox II 582
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