GREAT PLANES YAK 55 Manual de instruções - Página 13
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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.
Set the Control Throws
Use 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 between the high and low rate setting.
NOTE: The throws are measured at the widest part of the
elevators, rudder and ailerons.
These are the recommended control surface throws:
High Rate/3D
ELEVATOR
3" [76mm] up
3" [76mm] down
RUDDER
4-1/2" [114mm] right
4-1/2" [114mm] left
AILERONS
2-5/8" [67mm] up
2" [51mm] down
Note: High rates are 3D rates.
IMPORTANT: The YAK 55 EP w/ FlightFlex 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 YAK 55 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."
Balance the Model CG
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.
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.
Low Rate
1-1/2" [19mm] up
1-1/2" [19mm] down
1-1/2" [38mm] right
1-1/2" [38mm] left
1" [25.4mm] up
7/8" [22mm] down
13
❏
1. Use a felt-tip pen or 1/8" [3mm]-wide tape to accurately
mark the C.G. on the top of the wing on both sides of the
fuselage. The C.G. is located 3-3/8" [86mm] back from the
leading edge of the wing at the fuselage.
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 3/8" [9mm] 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.
❏
2. With all parts of the model installed, including the
battery (ready to fly) lift it upside-down on your fingertips at
the balance point you marked.
❏
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. If possible, relocate the battery pack
and receiver to minimize or eliminate any additional ballast
required. If additional weight is required, begin by placing
incrementally increasing amounts of weight on the bottom of
the fuse until the model balances. Once you have
determined the amount of weight required, it can be
permanently attached.
IMPORTANT: If you found it necessary to add any weight,
recheck the C.G. after the weight has been permanently installed.