❏
Use a
Great Planes AccuThrow Deflection Gauge
(GPMR2405) 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.
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.
IMPORTANT NOTE: The ideal CG location for this
model aircraft is at 5-3/8"(136.5mm). The CG range for
this model is from 5"(127mm) to 5-3/4"(146mm) back
from the leading edge of the top wing center section.
Do not exceed these limits for this model.
❏
1. Use a felt-tip pen or 1/8" (3mm)-wide tape to
accurately mark the C.G. on the bottom of the top wing on
the center section. The recommended C.G. is located 5-3/8"
[136.5mm] back from the leading edge
measured at the
center section of the top wing
.
❏
2. With the wings attached to the fuselage, all parts of the
model installed (ready to fly) and an empty fuel tank, lift the
model with your finger tips at the balance point you marked.
5"
5-3/4"
AFT LIMIT
FORWARD LIMIT
5-3/4"
5"
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.)
These are the recommend control surface throws:
High Rate
Low Rate
ELEVATOR:
1-5/8(40.9mm] up
1” [25mm] up
1-5/8(40.9mm] down
1” [25mm] down
RUDDER:
2-1/2” [64mm] right
1-1/2” [38mm] right
2-1/2” [64mm] left
1-1/2” [38mm] left
UPPER
AILERONS:
1-1/8” [28mm] up
5/8” [15.9mm] up
1-1/8” [28mm] down
5/8” [15.9mm] down
LOWER
AILERONS:
1-1/8” [28mm] up
5/8” [15.9mm] up
1-1/8” [28mm] down
5/8” [15.9mm] down
IMPORTANT:
The Pitts Special ARF 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 Pitts Special 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.”
Set the Control Throws
34
