Okay, well I sprayed it in, made sure it was in the right place, kinda tapped it forward to make sure the LE was filled then I propped it up and let it cure.

Went back a few days later and guess what...the foam expanded then shrunk, sucking the LE sheeting in with it. Not a bunch, but noticably 'thinning' the airfoil at the LE. It kinda looks like Cher's cheeks when she purses her lips.

It will take some surgery now to fix it, but not too bad.

So, I guess the moral of this story is, don't use expading foam to beef up the LE of the wing.

Anyone have an orphaned set of wings?

Jon