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Russ Kinne
Joined: 27 Jan 2006
Posts: 182
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 Posted: Tue Feb 21, 2006 9:20 am Post subject: flutter |
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In re flutter -- it can be a MOST serious problem at higher aircraft
speeds, and can destroy a control surface in a second or two -- but
doesn't seem to be a big problem at Kolb-speeds. However, it does
induce stresses to the wing and & airframe, and is easily corrected.
Simply remove the control surface, balance it on the hinge-pojnts,
and add or remove weight until it's evenly balanced.
Don't the plans require this?
I doubt adding a thin aluminum strip and a few pop-rivets would cause
a problem, but anything heavier might.
Ailerons seem to be the most commonly affected. A friend had an
aileron self-destruct at speed, in a race, in an F6F. Startling, but
survivable.
The last I knew the FAR's required control surfaces to be re-balanced
anytime they're painted -- It's interesting to note that The Friendly
feels that the weight of the paint alone can be sufficient to induce
flutter.
In any event, this is nothing to fool around with. You don't want to
be an unpaid test-pilot, or stress your bird unnecessarily. Fly safe!
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eagle1(at)commspeed.net
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| Posted: Tue Feb 21, 2006 11:04 am Post subject: flutter |
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I have flown RC aircraft in the past and have seen aileron flutter in RC
aircraft. It happens in a split second and there was nothing you could do to
save the plane.
Az Bald Eagle
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