Mount The Canopy; Mount The Servo Tray - GREAT PLANES Extra 300S Instruction Manual

2. Trim the 1/8" plywood forward and aft belly pan
formers so they match the fuse when placed in position.
3. Remove the covering only where the plywood belly
pan formers contact the bottom of the wing. Use thick or
medium CA to glue the belly pan formers to the wing. Make
sure you don't inadvertently glue the wing or the belly pan
formers to the fuse.
4. Use 320-grit sandpaper to lightly scuff the covering
where the molded ABS belly pan will contact the bottom of
the wing. Similarly, scuff the bottom of the belly pan where
it will contact the wing.
5. Position the belly pan on the wing and use thin CA to
glue it in place.
6. Unbolt the wing from the fuselage and glue the belly
pan formers to the belly pan with medium CA. Now would
be a good time to fuelproof the bare wood on the front of
the wing and the belly pan formers the same way you
fuelproofed the firewall and other parts of the fuse.

Mount the Canopy

1. Add whatever scale details you would like to the
cockpit, then glue in your pilot, or just paint the cockpit black.
2. Trim the clear molded canopy along the molded-in
cutlines. Use a sanding block and 220-grit sandpaper to
true the edges of the canopy for a finished appearance.
3. Wash the dust and fingerprints from the canopy with
lukewarm soapy water. If you wish to paint a frame on the
canopy to resemble the full size Extra, now is the time to do
so. Use a paint that is compatible with the canopy. Always
test your paint on a piece of leftover plastic cut from the
canopy. We suggest Pactra Formula-U or Chevron.
4. Mount the canopy to the fuselage. The easiest way is
to tape the edges of the canopy to the fuse with 1/4" red
striping tape, or use canopy glue for the most permanent
installation.

Mount the Servo Tray

1. If you haven't already done so, mount the grommets
and eyelets to your elevator, throttle and rudder servos.
2. Test fit your throttle, elevator and rudder servos in the
1/8" plywood servo tray. If necessary, enlarge the opening
in the servo tray so the sides of your servos will not contact
the servo tray. Position the servo tray in the fuselage but do
not glue it in place until instructed to do so.
3. Mount the cowl, prop and spinner and temporarily
place your battery pack and receiver inside the fuselage at
the location where you intend to mount them.
4. Bolt the wing to the fuselage. Refer to the balance
point in the sketch on page 19. Use thin strips of tape or a
felt-tip pen to accurately mark the balance point on the top
of the wing where it meets both sides of the fuselage.
5. Turn the model upside down and lift the wing at the
balance point or place it on a Great Planes C.G. Machine
(GPMR2400). If the nose tilts downward, your model is
nose heavy. Remove the wing and move the servo tray aft
or shift the receiver and battery pack aft. If the tail tilts
downward, your model is tail heavy. Remove the wing and
move the servo tray forward or sift the receiver and battery
pack forward. Reposition the model on your C.G. Machine
or lift it at the balance point again.
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