GREAT PLANES Old Timer, Instruction Manual

Page: 16 / 46

❏
2. Pin the top wing spar flat against your building board.
Position the 1/4" x 5/8" x 30" balsa wing leading edge
under the TE. Do not glue it to the TE. Use T-pins or weight
to hold it down against the building board.
❏
3. Cut two sheets of 1/16" x 3" x 24" [1.6mm x 76.2mm
x 609.6mm] balsa 16-1/2" [419mm] long. From one of the
16-1/2" [419mm] sheets, cut two strips, one 3/4" [19mm]
wide and a second one 1-1/2" wide. Glue the 3/4" strip to
the edge of the second 16-1/2" [419mm] sheet to make a
forward wing sheet.
❏
4. To glue the forward wing sheet to the top of the wing,
apply a bead of medium CA to the forward half of the top
main spar. Position the wing sheet so that the aft edge of the
sheet is centered on the top main spar. When the CA has
cured, apply a bead of medium CA to the top of each wing
rib, along the sub LE and the wing dowel support. Pull the
sheet down, making sure it contacts the surface of each rib
and the sub LE. Hold it in place until the CA has cured.
❏
5. Glue the 1/16" x 1-1/2" x 16-1/2" [1.6mm x 38mm x
419mm] balsa strip to the aft edge of the ribs, flush with the
aft edge of the TE.
❏
6. From the remaining 1/16" [1.6mm] balsa sheets cut in
step 3 and another 1/16" x 3" x 24" [1.6mm x 76.2mm x
609.6mm] balsa sheet, sheet the center and outer section of
the wing.
❏
7. Remove the wing center-section from your building
board. Trim the forward wing sheeting flush with the sub LE.
❏
8. Cut and glue the 1/4" x 5/8" x 30" [6.4mm x 15.9mm x
762mm] balsa leading edges to the front of the sub LE.
Trim and sand the LE and forward sheeting flush with
ribs W2.
❏
9. Trim and sand the LE, sub LE, top and bottom
sheeting, wing spars and TE flush with ribs W4.
16