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<<A friend's 320 had a vibration and it turned out to be the curved area of
the ailerons where the weights are attached. He removed the ailerons and
installed a 2 thin webs between the curved area and the front spar of the
aileron and presto no more vibration.>>

What you are talking about is a vibration of the weights themselves?  Caused
by insufficient stiffness of the forward part of the aileron, I presume,
right?

Gary Casey
ES project

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