When I bring the plane in after flying on a cold day, the wingtips near the hinge seam to be the only place that shows a visual of the slacker covering from thermal shock. This happens on both wing tips in the same place top and bottom. Is this typical on a cub wing? I know many don't fly in -20c but those days are quite often the nicest up here in the winter for flying. Not sure at what temp it doesn't do it. My guess is 0c.

It must be the geometry of that area Maybe? Maybe the way the fabric stretches more in that area during flight? Can't figure it out.

Curious if any have seen this?

After about 5 minutes everything goes back to normal.

As soon as I bring it in and crank the heat.


Five minutes later.




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