Great Planes Super Sportster 40 MkII ARF - GPMA1042 - Manual (Page 19)

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2. Mount the wing to the fuselage. If using a C.G. Machine,
adjust the rulers to measure 3-1/8" [79mm], then place the
model on the machine. If not using a C.G. Machine, lift the
model at the balance point marked on top of both sides of
the wing using the tip of the middle finger on both hands.
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3. If the nose drops the model is nose-heavy and will
require weight on the tail to balance. If the tail drops
however, the model is tail heavy and the model will require
weight on the nose to balance. If possible, mount the battery
pack and receiver in a location that will minimize or
eliminate any additional ballast required. If additional weight
is required, nose weight may be easily added by using a
“spinner weight” (GPMQ4645 for the 1 oz. [29g] weight, or
GPMQ4646 for the 2 oz. [57g] weight). In many cases,
though, Great Planes (GPMQ4485) “stick-on” lead weight is
suitable. A good place to add stick-on lead to the nose is to
the firewall. If tail weight is required (as most likely will be the
case), it may be temporarily attached to the side of the fuse
(opposite the engine exhaust) under the stab. After test
flying and confirming the amount of weight required, the
bottom of the fuse may be cut open and the weight
permanently glued inside.
Note: Do not rely upon the adhesive on the back of the lead
weight to permanently hold it in place. Over time, fuel and
exhaust residue may soften the adhesive and cause the
weight to fall off. Use RTV silicone or epoxy to permanently
hold the weight in place.
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4. IMPORTANT: If you found it necessary to add any
weight, recheck the C.G. after the weight has been installed.
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1. With the wing level, lift the model by the engine
propeller shaft and the bottom of the fuse under the trailing
edge of the fin. Do this several times.
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2. If one wing always drops when lifting the model, it
means that side is heavy. Balance the airplane by adding
weight to the other wing tip. An airplane that has been
laterally balanced will track better in loops and other
maneuvers.
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1. Turn on the transmitter and receiver and center the
trims. If necessary, remove the servo arms from the servos
and reposition them so they are centered. Reinstall the
screws that hold on the servo arms.
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2. With the transmitter and receiver still on, check all the
control surfaces to see if they are centered. If necessary,
adjust the clevises on the pushrods to center the control
surfaces.
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3. Make certain that the controls respond in the correct
direction as shown in the diagram. If necessary, use the
4-CHANNEL TRANSMITTER
4-CHANNEL TRANSMITTER
4-CHANNEL TRANSMITTER
4-CHANNEL RADIO SET-UP
(STANDARD MODE 2)
TRANSMITTER 4-CHANNEL
ELEVATOR MOVES UP
RIGHT AILERON MOVES UP
LEFT AILERON MOVES DOWN
RUDDER MOVES RIGHT
CARBURETOR WIDE OPEN
Check the Control Directions
Balance the Model Laterally
This is where the model should balance for the first
flights. Later, you may wish to experiment by shifting the
C.G. up to 7/16" [11mm] forward or 7/16" [11mm] back to
change the flying characteristics. Moving the C.G. forward
will increase stability, but will decrease maneuverability.
Conversely, moving the C.G. aft will increase maneuverability,
but will decrease stability. In any case, as long as the
model is balanced within the recommended range it
will not display any bad tendencies. Do not at any time
balance the model outside the recommended range.
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