GREAT PLANES Ryan STA-M Instruction Manual page 16

4. Install the fuel tank so the neck fits through the hole in
the firewall. Be certain that you have installed the tank so the
vent tube inside the tank is pointing upward. Use a couple of
#64 rubber bands (not included) to hold the tank to the tank
floor. Note: There may be a little resistance installing the tank
at the point when it is at an angle pointing toward the top of the
fuselage, but with a little "persuasion" it will slide into position.
5. Test fit the rudder servo and both elevator servos in the
1/8" [3mm] plywood aft servo tray. If necessary, enlarge the
opening to accommodate the servos. Drill 1/16" holes in the
tray for mounting the servos, then add a few drops of thin CA
to the holes and allow to harden. Don't mount the servos into
the tray until instructed to do so.
Refer to this photo for the following four steps.
6. Use epoxy to securely glue the aft servo tray to the top
edges of the crutches inside the fuselage. For additional
strength, add milled fiberglass (GPMR6165) to the epoxy.
Use clamps to hold the aft servo tray in position until the
epoxy hardens.
7. Determine which way you will be mounting the 1/8"
[3mm] plywood forward servo tray. Position the tray to
provide the best alignment of the throttle servo with the
carburetor arm on the engine. As can be seen in the photo at
step 6 on page 21 the forward servo tray in this model was
mounted with the throttle servo nearest the rear of the
fuselage on the left side.
8. Securely glue both 1/4" x 3/8" x 6-1/4" [6 x 10 x 160mm]
hardwood forward servo tray rails to the plywood inner fuse
sides. The bottom edge of the rails must be even with the top
edge of the opening in the 1/16" ply inner fuse sides.
9. Trim both sides of the forward servo tray to get it to fit
between the inner fuse sides on the rails. Drill three evenly
spaced 1/16" [1.6mm] holes through both sides of the tray
and the rails (see step 6 on page 21). Add a few drops of thin
CA to each hole and allow to fully harden.
10. Remove the servo tray. Enlarge the holes in the tray
with a 3/32" [2.4mm] drill. Mount the tray to the rails with six
#2 x 1/2" [13mm] screws and #2 washers.
11. Mount the throttle servo, receiver and battery pack to
the tray. Use hard balsa sticks (not included) and rubber
bands to secure the receiver and battery pack. Place 1/4"
[6mm] or 1/2" [13mm] R/C foam rubber under the receiver
and battery.
12. Mount the forward servo tray in the fuselage and
mount the rudder and elevator servos to the aft servo tray. If
necessary, cut the front of the elevator pushrod tubes
(factory installed in the fuselage) a few inches short of the
elevator servos.
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