While performing rolls in my Super D I have experienced some "flutter" vibration from about the 70 degree to about the 120 degree position. It occurs while rolling left and right. It occurs on both sides, 70-120, then 250-300. I thought nothing of it until I was flying with an aerobatic judge. He did not notice it until I mentioned it, then he was concerned enough for us to knock off and head home. He has not not flown Decathlons in about 12 years (he's been flying Pitts and Yaks recently), so he can't remember that vibration and admitted he does not know if it is normal or not. It seems to be about the point that the rudder starts to act as an elevator. Is this normal? If not, any ideas? The fabric in that area is original, 1995, but in very good condition. No obvious looseness in the rudder or anywhere else in the tail.
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"Flutter" in roll
- Thread starter Blackhawk
- Start date
mike newall
New member
Sounds like buffet from the wing with the down deflected aileron approaching its critical aoa.