L-19 Bird Dog
The right outboard panel with a 1-ounce tip weight installed (above left). The bottom of the entire wing has zero dihedral and can be built flat on your work table. Flat fuselage sides (above right) are lined with balsa strips recessed 1⁄8-
strips. Join the three spar sections together with 1⁄8-inch ply joiners, front and back. Glue the center spar section to the bottom
of the center panel. Add cardboard ribs to the center section. Apply glue to the top of the wing spar, the top of the ribs and the trailing edge of the wing and fold the center top wing surface down and pin securely in place until dry. Now glue the right outboard spar section to the bottom of the right out- board wing panel. Glue the ribs in place along with a one-
inch and have cardboard supports for bellcrank and fuel tank ply mounts. Note the cutouts for the flying wires and the pushrod exit in the left side and the notch in the fuselage bottom for the ply gear mount.
ounce weight near the wing tip. Fold the top surface down and glue securely in place. Build the left outboard wing panel in a sim- ilar fashion. Add the balsa tips to the wing
and sand to shape. Make a line guide from 1⁄8-inch ply. Cut slots in the left wing balsa tip and glue the line guide in place. Cover the trailing edge and all seams with gummed paper tape. Fuselage: The flat fuselage sides are out-
lined with a triangular symbol on the draw- ing. Line the upper and lower edges of each
fuselage side with 1⁄8 × 1⁄4-inch balsa strips, as shown in the fuselage side view. The strips are recessed 1⁄8-inch in from the fuse- lage edges. Bevel the strips at the aft end of the fuselage so that the cardboard sides will come together. Add cardboard supports to each fuselage
side below the bellcrank and the fuel tank. Be sure and cut holes in the left fuselage side for the bellcrank leadout lines and pushrod exit. Note that each fuselage side is scored and folded in one place. There are two
CD439A © Carstens Publications
Full-size plans available through Carstens Bookstore
www.carstensbookstore.com 54
MAY 2012
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