Great Planes Ultra Sport 40 Plus Kit - GPMA0390 - Manual (Page 50)

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3. Make certain that the control surfaces and the
carburetor respond in the correct direction as shown in the
diagram. If any of the controls respond in the wrong
direction, use the servo reversing in the transmitter to
reverse the servos connected to those controls. Be certain
the control surfaces have remained centered. Adjust if
necessary.
Use a Great Planes Accu-Throw (or a ruler) to accurately
measure and set the control throw of each control surface
as indicated in the chart that follows. If your radio does not
have dual rates, we recommend setting the throws at the
low rate setting. After you get used to the airplane, you may
change the throws to the “high rates” settings.
Note: The throws are measured at the widest part of the
elevators, rudder and ailerons.
At this stage the model should be in ready-to-fly condition
with all of the systems in place including the engine, landing
gear, covering and paint, and the radio system.
More than any other factor, the C.G. (balance point) can
have the greatest effect on how a model flies, and may
determine whether or not your first flight will be
successful. If you value this model and wish to enjoy it for
many flights, DO NOT OVERLOOK THIS IMPORTANT
PROCEDURE. A model that is not properly balanced will
be unstable and possibly unflyable.
Balance the Model (C.G.)
IMPORTANT: The Great Planes Ultra Sport 40 Plus has
been extensively flown and tested to arrive at the throws
at which it flies best. Flying your model at these throws
will provide you with the greatest chance for successful
first flights. If, after you have become accustomed to the
way the Great Planes Ultra Sport 40 Plus flies, you would
like to change the throws to suit your taste, that is fine.
However, too much control throw could make the model
difficult to control, so remember,
“more is not always better.”
These are the recommended control surface throws:
ELEVATOR:
Low Rate High Rate 3D Rate
3/8" [10mm] up 9/16" [15mm] up 1-1/2" [38mm] up
3/8" [10mm] down 9/16" [15mm] down 1-1/2" [38mm] down
RUDDER:
Low Rate High Rate 3D Rate
1-3/4" [45mm] right 3-3/8" [85mm] right 4-3/4" [121mm] right
1-3/4" [45mm] left 3-3/8" [85mm] left 4-3/4" 121mm] left
AILERONS:
Low Rate High Rate 3D Rate
5/16" [8.5mm] up 7/16" [11.5mm] up 3/4" [19mm] up
5/16" [8.5mm] down 7/16" [11.5mm] down 3/4" [19mm] down
Set the Control Throws
CARBURETOR WIDE OPEN
RUDDER MOVES RIGHT
LEFT AILERON MOVES DOWN
RIGHT AILERON MOVES UP
ELEVATOR MOVES UP
4-CHANNEL TRANSMITTER
(STANDARD MODE 2)
4-CHANNEL RADIO SETUP
TRANSMITTER 4-CHANNEL
TRANSMITTER 4-CHANNEL
TRANSMITTER 4-CHANNEL
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