Great Planes Ultra Sport 40 Kit - GPMA0410 - Manual (Page 39)

INSTALL PILOT
Assemble and paint your pilot figure, and glue it
to the cockpit floor. NOTE: To avoid the possibility of
the pilot coming loose inside the canopy, we recommend
that you drill up through the cockpit floor and pilot base,
and use two #6 or #8 sheet metal screws (not included)
to lock the pilot in place.
GLUE CANOPY IN PLACE
2. Also apply a couple pieces of the foam tape to the
1/4" ply wing hold-down plate, which helps to distribute
the load when the nylon bolts are tightened.
*NOTE: An alternate method of sealing the wing/
fuse joint is to use "silicone bathtub sealer". This
is an excellent method, used by many experts
because it results in a permanent and nearly perfect
wing saddle joint. Briefly, the technique is as
follows: 1. Cover the top of the wing center section
with waxed paper or plastic kitchen wrap. Pull out
all wrinkles and tape it to the wing. 2. Squeeze out
a bead of silicone sealer onto the wing saddle area of
the fuselage. 3. Lay the wing in the saddle and push
down gently. The excess silicone sealer will
squeeze out. 4. Allow to dry without disturbing for
at least 24 hours. 5. Remove the tape, then remove
the wing from the saddle (leaving the waxed paper
or plastic wrap in place). 6. Gently pull the waxed
paper or plastic wrap away from the sealer. 7. Using
a new single-edge razor blade, trim the sealer flush
with the wing fillets, and along the inside of the
fuselage.
1. Lightly sand the inside of the canopy around the
edge (sand a strip approximately 1/8" wide). NOTE: To
avoid sanding more than you want, it is helpful to first
apply strips of masking tape on the inside of the canopy,
1/8" in from the edges.
RE-INSTALL ENGINE & RADIO
Re-install the engine, propeller, battery, re-
ceiver, servos, control horns, pushrods, main LG. nose
gear and wheels. Attach the wing to the fuselage.
2. Poke pinholes (1/8" apart) through the covering
material in the area where the canopy will be glued to the
fuselage.
3. Hold the canopy in place on the fuselage and
very carefully apply medium viscosity CA glue around
the edges. To control the amount of CA, it is very helpful
to use the small diameter tenon applicator tubing which
is supplied with most CA glues or use a new "Z-end"
applicator tip.
4. To hide the canopy glue joint, you can use 1/4"
wide striping tape as a border around the canopy.
WING SEATING
1. Apply 1/4" or 3/8" wide foam wing seating tape
to the wing saddle area to seal the wing/fuse joints.*
39
BALANCE YOUR MODEL
NOTE: This section is VERY important and
must not be omitted! A model that is not properly
balanced will be unstable and possibly unflyable.
1. Accurately mark the balance point on the bottom
of the wing on both sides of the fairing. The balance point
is shown on the plan (CG), and is located approximately
4 inches back from the leading edge. This is the balance
point at which your model should balance for your first
flights. Later, you may wish to experiment by shifting
the balance up to 3/8" forward or back to change the
flying characteristics. Moving the balance forward may
improve the smoothness and arrow-like tracking, but it
may then require more speed for takeoff and make it more
difficult to slow down for landing. Moving the balance
aft makes the model more agile with a lighter and
snappier'' feel" and often improves knife-edge capabili-