On Sep 15, 8:09*am, Kenneth Kilbourne
wrote:
What causes the buckling/oil canning on the bottom of the ailerons and the
elevator on Grobs? I have looked at 6 ships and they all have the same
problem.
What's the fix?
KK

Grob 109 Motorgliders have that on the undercambered ailerons as well.
Not on the elevator though.

Poor design caused it.

The solution is to redesign it yourself since Grob will not do it.

It would be quite a process to build, test and get approval for a
change to the certified aircraft.

Bottom line, it is not worth the trouble to change so you just
tolerate the flaw.

Ray