Great Planes Super Decathlon 40 Kit - GPMA0185 - Manual (Page 27)

D 4. Mount the aileron servo using the screws provided
with your radio.
D 5. Screw the nylon aileron clevises approximately 2/3
of the way onto the threaded end of the two 12" steel wire
pushrods.
D 10. Harden the balsa in the area of the control
horns (on both sides of the control surfaces) by poking
several holes with a pin, then apply thin CA glue. Sand
smooth.
D 11. Mount the horns with 2-56 screws and the nylon nut-
plates which were attached to the horns.
D 6. Screw the nylon aileron clevis connectors onto the
aileron torque rods.
D 12. Trial fit and trim the 3/16" x 1/2" x 4-3/4" ply servo
rails to fit flush with the fuse sides and mount your servos to
the rails as shown on the plans. Now securely glue the servo
rails to the fuse sides. Lock the rails in place by gluing scraps
of 1/8" ply on top and bottom of the rails.
D 7. Attach the clevises to the clevis connectors; then,
with the ailerons in the neutral position, mark the pushrod
wires where they cross the holes in the servo arm. Remove the
pushrods and make a "Z-bend" in the rods at that point,
using a "Z-bend pliers" or a standard pliers.
D 8. Remove the servo wheel from the servo and work
the Z-bends into the wheel (NOTE: You may have to enlarge
the servo wheel holes with a 5/64" diameter drill bit). Replace
the servo wheel and check the operation of the ailerons. (See
page 29 for the recommended amount of aileron movement).
IMPORTANT: PLAN YOUR SERVO
INSTALLATION CAREFULLY!
D 13. Cut one of the the 36" lengths of plastic pushrod
guide tube exactly in half, then sand the outer surface of the
pushrod guide tubes with 100-grit sandpaper to provide a
surface to which the glue will adhere.
D 9. Hold the nylon control horns on the elevator and
rudder in the positions shown on the plan and mark the
mounting hole locations. REMEMBER: The elevator horn
is located on the bottom of the elevator! Drill 3/32" diameter
holes at these locations.
D 14. Use an Xacto knife to sharpen one end of a piece of
3/16" (outside diameter) brass tubing, then use this tubing to
cut the pushrod exit holes (you may use a 3/16" drill bit, but
the brass tube method gives a much neater cut). Determine
the location of these holes from the plans. You may chuck
this brass tube in an electric drill to aid in getting through
F-7T.
27