Great Planes Profile 38 - GPMA0487 - Manual (Page 15)

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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.
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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.
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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.
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5. Insert the throttle torque rod through the wing ribs and
position the wheel collars and plastic bearings on the rod.
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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.
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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.
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8. With the three remaining wheel collars in position, cut
slots in the bottom sheeting under the wheel collars.
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