Great Planes Ultra Sport 40 Kit - GPMA0410 - Manual (Page 23)

2. Trim the 3/16" ply servo rails and temporarily
mount your servos. (NOTE: Depending on the width of
your servos, and the spacing between servos, you may
have to enlarge the opening in the fuse top). Now
securely glue the servo rails to the fuse sides and fuse top.
Lock the rails in place by gluing scraps of 1/8" ply on top
of the rails.
exit points using thin CA glue. Use scraps of 1/8"
balsa to anchor the tubes to F-5. Do not anchor
the tubes to F-4 at this time, to allow for slight
adjustment of their positions later.
flush with the fuse sides using a sanding block.
7. Cut off the tubes at the exit points and sand them
6A. Glue the tubes to the fuse sides at the rear
3. Cut one of 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.
4. 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-6.
8. Temporarily install the engine mount,
nosegear (and nosegear steering arm if you are build-
ing a tricycle configuration).
5/32" Collar
Steering Arm
Cut off end
6-32 x 1/4" Screw
9. Cut 1/4" off the end of the steering arm. then
drill a 3/16" hole in F-l, just above the outer hole of the
arm. NOTE: The drill should be aimed toward the
rudder servo to avoid tight bends in the pushrod.
5. Insert the plastic pushrod tubes through the
holes you just cut and through formers F-6, F-5 and F-4.
your radio installation plan. Temporarily insert
the 34" pushrod wires into the tubes and hold them
in the correct position with tape at the servo end.
Keep the tubes as straight as possible.
10. With the engine resting on the mount, plan the
23