Top Flite TOPA0155 - Manual (Page 54)

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4. Once the location of the servo tray has been
determined, mark the ply fuse sides where the servo
tray mounting rails are to be positioned. Be certain not
to position the servo tray too low causing the air valve
to contact the top of the wing. Cut the servo tray
mounting rails from the 1/4" x 1/4" x 18" [6.4 x 6.4 x
457mm] basswood stick and glue them into position.
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R5. If installing retracts, mount the retract air
valve using the die-cut 1/8" [3.2mm] plywood air
valve mount. Connect the air valve servo to the air
valve using a pushrod and hardware of your
preference (not included). As can be seen in
following photos, a ball link was used on the air valve
and a Z-bend was used on the servo arm.
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6. Mount the servo tray to the rails with four #2 x
3/8" [9.5mm] screws (don’t forget to harden the holes
in the rails with thin CA first). Cut the throttle pushrod
to the correct length, then connect it to the throttle
servo with a screw-lock connector, a retainer and a
4-40 x 1/8" [3.2mm] screw.
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7. Drill 1/4" [6.4mm] holes through the firewall for
the fuel lines. Temporarily connect the fuel tank to the
fuel filler valve and the pressure fitting on the muffler.
When it’s time to permanently mount the tank, glue a
piece of leftover balsa to the ply fuse sides across
the bottom of the tank to securely hold it in position
(this may be done after the model has been covered
and the firewall and fuel tank mounting area has
been fuelproofed).
While working on the servos inside the fuse, now is
a good time to mount the elevator and rudder
control horns.
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8. Temporarily connect a nylon clevis to a large
control horn and screw it onto the elevator pushrod.
Mount the control horn to the elevator with #2 x 3/8"
[9.5mm] screws the same as was done on the flaps
and ailerons (don’t forget to harden the mounting
area and screw holes with thin CA first).
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9. Temporarily connect the rudder pushrod to the
rudder the same way. Note: The battery pack and
receiver will be mounted and the rudder and tail
steering pushrods will be linked after the model has
been covered.
Cut the cockpit opening
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1. Trim the canopy along the molded-in cutlines.
True the edges with a bar sander and 80-grit
sandpaper. Smooth the edges of the canopy with
320 or 400-grit sandpaper. Wash the canopy in
soapy water, then rinse and dry.
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2. Position the canopy on the fuse and hold it in
place with a rubber band. Position the front of the
canopy over the seam in the fuse sheeting at former F6
as shown in the following photo. View the canopy from
the top, sides and front to make certain it is centered.
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3. Use a ballpoint pen to mark the outline of the
canopy onto the fuselage.
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4. Remove the canopy. From inside the fuselage,
stick a T-pin through the sheeting against the front
edge of former F7 on both sides of the fuse. Wrap a
piece of tape around the fuse top connecting the T-
pins. With a ballpoint pen draw a line along the edge
of the tape that is contacting the pins.
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