Great Planes Gee Bee Profile 40 Kit - GPMA0485 - Manual (Page 22)

We recommend the following control surface throws:
Elevator: High Rate
7/8" up [22.2mm]
7/8" down [22.2mm]
Rudder: 2" left [50.8mm]
2" right [50.8mm]
Ailerons: 1" up [25.4mm]
1" down [25.4mm]
Low Rate
5/8" up [15.8mm]
5/8" down [15.8mm]
5/8" left [15.8mm]
5/8" right [15.8mm]
3/4" up [19mm]
3/4" down [19mm]
the balance up to 3/8"[9.5mm] forward or backward to
change its flying characteristics Moving the balance
forward may improve the smoothness and stability, but the
model may then require more speed for takeoff and may
become more difficult to slow for landing Moving the
balance aft makes the model more agile with a lighter,
snappier "feel," and often improves knife-edge capabilities
In any case, please start at the location we recommend Do
not at any time balance your model outside the
recommended range.
NOTE: If your radio does not have dual rates, we
recommend setting the throws at the low rate setting. The
high rate throws are tor "hot dog" flying.
We added approximately 20% exponential to all control
surfaces This reduces the sensitivity of the control
surfaces at the neutral position.
Q 2 With all parts of the model installed (ready-to-fly) and
an empty fuel tank, lift the model at the balance point If the
tail drops, the model is "tail heavy" and you must add
weight to the nose to balance the model If the nose drops,
it is "nose heavy and you must add weight to the tail to
balance the model.
NOTE: The balance and control throws for the Gee Bee
Profile have been extensively tested This chart indicates
the settings at which the Gee Bee Profile flies best Please
set up your model to the specifications listed above If, after
you become comfortable with your Gee Bee Profile, you
would like to adjust the throws to suit your tastes, that's
fine Too much throw can force the plane into a stall or snap
roll, so remember, "more is not always better."
NOTE: Nose weight may be easily installed by using a
"spinner weight" Tail weight may be added by using Great
Planes (GPMQ4485) "stick-on" lead weights.
If possible, first attempt to balance the model by changing
the position of the receiver battery If you are unable to
obtain good balance by doing so, then it will be necessary
to add weight to the nose or tail to achieve the proper
balance point.
At this time, check all connections including servo horn
screws, clevises, servo cords and extensions Make sure
you have installed the nylon retainer on the Screw-Lock
Pushrod Connector and the silicone retainers on all
the clevises.
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 The balancing point (C.G.) is located 3-7/8"[98.4mm]
back from the leading edge of the wing Hang the Gee Bee
Profile by a string threaded through the balance hole on the
bottom of the model This is the balance point at which your
model should balance for your first flights After initial trim
flights and when you become more acquainted with your
Gee Bee Profile, you may wish to experiment by shifting
Follow the battery charging procedures in your radio
instruction manual You should always charge your
transmitter and receiver batteries the night before you go
flying, and at other times as recommended by the
radio manufacturer.
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