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Things You'll Need
Instructions
Building a Fiberglass Fuselage
Apply the release agent to your mold. This is needed to separate the finished fiberglass part from the mold. You should have a left side and right side mold for the fuselage.
Cut strips of fiberglass cloth to lay in the molds. Do not put the strips into the mold in the same direction; varying the weave of the fiberglass cloth increases the parts strength. Make sure each piece extends past the edge of the mold.
Apply the fiberglass resin with a paintbrush. Make sure all of the fiberglass gets saturated with resin.
Allow several hours for the resin to dry. The parts should be rigid and dry to the touch.
Remove the parts from the mold. This may take a little effort, do not pry the part out with a screw driver or other sharp object as you might damage the part.
Trim the part with a knife or scissors. Your fuselage halves should match up perfectly.
Use epoxy to glue the plywood formers into one half of the fuselage. Use sandpaper to rough up the fiberglass a little for better adhesion. Wait for the epoxy to set up before moving on.
Join the two fuselage halves together using epoxy on all surfaces that touch. Use rubber bands as clamps to hold the pieces together while the epoxy cures.
Cut two long thin strips if fiberglass cloth about 1/2 inch wide. Apply these strips to the joints where the fiberglass meets. Use resin and saturate the cloth. When dry your fuselage is built, sand all edges smooth.
Fiberglassing a Foam Wing
Dry fit wing halves together and epoxy in any dihedral bracing. Allow the epoxy to dry before moving to the next step.
Sand the leading edge smooth with a fine sandpaper. Remove any foam dust with compressed air or a tack cloth.
Cut a strip of fiberglass cloth about 3 inches wide and 2 inches longer then the wing cord at the center. Use epoxy to secure the fiberglass to the top of the foam wing. Overlap the leading and trailing edges with 1 inch of fiberglass cloth.
Repeat Step 3 for the bottom of the wing.