Top Flite TOPA0101 - Manual (Page 40)

COOLING NOTES
Model engines require sufficient cooling to provide
reliable operation, good performance and long life.
There are two problems which often present
themselves in scale models with cowlings: lack of
air intake area and lack of air outlet area. A rough
rule in figuring such installations is to allow twice
as much outlet area as intake area.
The Corsair model, equipped with a single cylinder
engine, has too much intake area. To work around
this problem, the prototypes were equipped with
baffles. A baffle is used to block intake area where
it offers little benefit and to promote good airflow
where it is needed (at the cylinder head). A typical
baffle pattern is provided on the plan.
Ample air outlet area must be provided for good
cooling. The bottom of the cowl is a logical place
for this since it is least visible there. Refer to the
photograph on page 35 to see the outlet on
the prototypes.
Most modern engines in the size range specified
provide more than ample power for the Corsair. It
is recommended, therefore, that you run the
engine somewhat rich for the first flights because
the excess fuel running through the engine
provides a cooling effect. If your engine is not
broken in, run a few tanks of fuel through it on the
ground with the cowl removed before flying.
INSTALL RECEIVER, SWITCH
AND BATTERY
❏
1. Wrap your receiver and battery in plastic
bags, then wrap with foam rubber.
❏
2. Install the battery and receiver in the fuselage.
NOTE: These were put under the fuel tank forward
of the wing in the .60 powered prototype as shown
on the plan. Additional foam was put between
them and the fuel tank to hold them in place. The
position of the battery and receiver may be
changed to balance the aircraft.
❏
3. Route the receiver antenna in one of the
following ways:
A . Route the antenna along the inside of the fuse
side and out of the fuse top, just behind the
canopy. Anchor the antenna to the top of the fin
with a rubber band.
B . Install another “pushrod guide tube” along the
inside of the fuse, along the bottom, exiting just
behind the tailgear. Insert the antenna through the
tube and let the excess length trail behind.
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 top
of the wing on both sides of the fuselage. The
balance point is shown on the plan
(CG) and is
located approximately 4-1/4 inches back from the
leading edge at the center. 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
5/16" 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
capabilities. In any case,
do not balance your
model outside the recommended range .
❏
2. With the wing attached to the fuselage, all
parts of the model installed (ready to fly), the landing
gear extended and an
empty fuel tank , hold the
model upside down with the stabilizer level.
CONTROL SURFACE THROWS
We recommend the following control surface
throws. (Throws are measured at the widest part
of the elevators, rudder and ailerons.)
ELEVATOR: 11/16" up, 5/8" down (High Rate)
1/2" up, 7/16" down (Low Rate)
RUDDER: 2-3/8" right, 2-3/8" left (High Rate)
1-3/8" right, 1-3/8" left (Low Rate)
AILERONS: 1/2" up, 1/2" down (High Rate)
3/8" up, 3/8" down (Low Rate)
FLAPS: At low point of middle flap,
1-3/8" down
NOTE: If your radio does not have “dual rates,”
then set up the control surfaces to move midway
between the recommended high and low rates.
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