Great Planes Super Sportster 40 MkII Kit - GPMA0205 - Manual (Page 32)

Note: The balance and surface throws for this aircraft
have been extensively tested. We are confident that
they represent the settings at which the Super
Sportster 40 Mk II flies best. Please set up your aircraft
to the specifications listed above. If, after a few flights,
you would like to adjust the throws to suit your tastes,
that's fine. Too much throw can force the plane into a
stall, so remember, "more is not better"
D 13. Install the aileron servo as shown using two 6" wire
pushrods, swivel clevises, and Faslinks. We suggest
that the swivels be screwed 1/4" below the top edge of the
aileron torque rod arms to start with. Lowering the swivels
w i l l cause the ailerons to deflect more if you need
more throw.
ELEVATOR MOVES UP
RIGHT AILERON MOVES UP
LEFT AILERON MOVES DOWN
RUDDER MOVES RIGHT
NOSE WHEEL TURNS RIGHT
CARBURETOR WIDE OPEN
4-CHANNEL RADIO SETUP
(STANDARD MODE 2)
D 14. Turn on the radio system and check the direction of
all control functions. They must all move in the direction
shown in the sketch. If not, change the position of the
reversing switches on your transmitter.
We recommend the following control surface throws:
Note: Throws are measured at the widest part of the elevators, rudder,
and ailerons. Adjust the position of the pushrods at the control/servo
horns to control the amount of throw.
ELEVATOR:
(High Rate)
1/2" up
5/8" down
RUDDER:
1-3/8" right
1-3/8" left
AILERONS:
(High Rate)
5/16" up
5/16" down
(Low Rate)
5/16" up
3/8" down
(Low Rate)
3/16" up
3/16" down
Note: If your radio does not have "dual rates," then set up the control
surfaces to move between the high rate and low rate throws.
Note: This section is VERY important and must NOT be
omitted! A model that is not properly balanced will be
unstable and possibly unflyable.
D 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 3-1/4" back from
the leading edge as shown in the sketch and on the plans.
Hint: Use the full-size wing plan to help you accurately
locate the proper balance point on the wing. 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 1/4" 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, please start at the location we recommend and do
not at any time balance your model outside the
recommended range.
D 2. With the wing attached to the fuselage, all parts of the
model installed (ready to fly) and an empty fuel tank, hold
the model upside-down with the stabilizer level.
D 3. Lift the model at the balance point. If the tail drops
when you lift, the model is "tail heavy" and you must add
weight* to the nose to balance. If the nose drops, it is "nose
heavy" and you must add weight* to the tail to balance.
Note: Nose weight may be easily installed by using a
"Spinner Weight" or gluing lead weights into the engine
compartment. Tail weight may be added by using Great
Planes (GPMQ4485) "stick-on" lead weights, and, later, if
the balance proves to be OK, you can open the fuse bottom
and glue these in permanently.
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