Stub Wings

Stub Wings

Page 2
The sanding form is filled with 1 1/2" Trymer 2000 foam. I glued the tree pieces together with Great Stuff Spray Foam. Weights were added to keep the foam from moving while the spray foam set up. After drying a 4' sanding block with 50 grit paper was employed to shape the inside of the airfoil pattern. One layer of glass was laid in the cavity after filling the foam pores with runny micro.
 
After the epoxy cured the foam/glass was removed from the form. A second Leading edge was made in the same mold. Both leading edges will be attached to the main spars and plywood ribs. The foam will be sanded to outside airfoil shape. The trailing edge, top, and bottom, will be glued in at shaped at the same time. One layer of fiberglass and peel ply will be added to protect the foam until the main wings are ready to be glassed. Then the whole wing structure will be glassed at the same time.