Great Planes Matt Chapman CAP 580 Giant ARF - GPMA1285 - Manual (Page 22)

Use a Great Planes AccuThrow ™ (or a ruler) to accurately
measure and set the control throw of each control surface
as indicated in the chart that follows. 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, and the radio system.
NOTE: For a model this large, checking the CG requires
two people.
❏
1. Using a felt-tip pen or 1/8" [3mm]-wide tape, accurately
mark the C.G. on the tips of both wing panels. The C.G. is
located 3-1/2" [90mm] back from the leading edge of the
wing AT THE WINGTIP, NOT THE FUSELAGE!
❏
2. With the wing attached to the fuselage, all parts of the
model installed (ready to fly) and an empty fuel tank, you
and your helper lift the model from the marked CG location.
❏
3. If the tail drops, the model is “tail heavy” and the battery
pack and/or receiver must be shifted forward or weight must
be added to the nose to balance. If the nose drops, the model
is “nose heavy” and the battery pack and/or receiver must be
shifted aft or weight must be added to the tail to balance.
This is where your model should balance for the first
flights. Later, you may wish to experiment by shifting the
C.G. up to 1/2" [13mm] forward or 1/2" [13mm] back to
change the flying characteristics. Moving the C.G. forward
may improve the smoothness and stability, but the model
may then require more speed for takeoff and make it more
difficult to slow for landing. Moving the C.G. aft makes the
model more maneuverable, but could also cause it to
become too difficult to control. In any case, start at the
recommended balance point and do not at any time
balance the model outside the specified range.
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 1/3-scale Matt Chapman
CAP 580 ARF has been professionally and 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 1/3-scale
Matt Chapman CAP 580 ARF 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:
High Rate Low Rate
ELEVATOR: 1-1/8" [28mm] up 7/8" [22mm] up
1-1/8" [28mm] down 7/8" [22mm] down
RUDDER: 3" [76mm] right 2" [50mm] right
3" [76mm] left 2" [50mm] left
AILERONS: 1-3/4" [44mm] up 1-3/8" [35mm] up
1-3/4" [44mm] down 1-3/8" [35mm] down
For all out 3D: Set the throws
as high as possible without binding.
Set the Control Throws
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