Charles River Radio Controllers - Repairing Molded Wings

[Courtesy of Ollie Wilson (ocwilson "at" sunline.net), November 1998]

Here is the way I did it on my RnR evolution:

Cut away a triangular piece of the damaged area to remove all the crushed and delaminated area.
Fit an over sized piece of closed cell foam to the cut away area and tack glue it in place without leaving a glue ridge at the joint.
Sand the foam to the wing contour and roughen the surface slightly around the repair.
Cover the foam with 3 or 4 layers of 1.4 ounce glass cloth (each 0.002 inches thick) in slow cure epoxy overlapping the skin around the repair. Stagger the edges of the glass.
Blot off any excess epoxy with paper towels before the epoxy sets.
Feather the edge of the layup after the epoxy cures.
Paint.

Regards, Ollie