GREAT PLANES Profile 38 Instruction Manual page 15

2. From the remaining 1/16" x 3" x 30" [1.6mm x 76mm x
762mm] balsa sheet, used to make the bottom trailing edge
sheet, and a second 1/16" x 3" x 30" [1.6mm x 76mm x
762mm] balsa sheet, make two top trailing edge sheets.
Glue the top trailing edge sheets in position.
3. Use 320-grit sandpaper to roughen the 1/8" x 5" [3mm
x 127mm] plastic tube. Cut three 5/8" [16mm] long throttle
torque rod bearings from the 1/8" x 5" [3mm x 127mm]
plastic tube.
4. Lay the 1/8" x 17-1/2" [3mm x 445mm] throttle torque
rod over the plan and mark the location of the four 1/8"
[3mm] wheel collars. Use a file to make a flat spot at each
wheel collar location. Make sure the flats are all on the same
side of the throttle torque rod.
5. Insert the throttle torque rod through the wing ribs and
position the wheel collars and plastic bearings on the rod.
6. Use epoxy to glue the die-cut 3-ply W-1A and W-3A
sub-ribs to both sides of the W-1 and W-3 ribs. Also glue
the throttle torque rod bearings to the ribs. Be careful to not
get epoxy in the plastic bearings. A light coat of grease on
the torque rod will prevent the epoxy from sticking to the
torque rod. Before the epoxy hardens, make sure the throttle
torque rod rotates freely.
7. Position the torque rod in its correct location. Apply a
drop of thread lock to a 4-40 set screw and secure the one
wheel collar, that will not have a torque rod horn installed on
it, on the throttle torque rod. Make sure that the set screw is
tightened on the flat spot on the throttle torque rod.
8. With the three remaining wheel collars in position, cut
slots in the bottom sheeting under the wheel collars.
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