B
EFORE
F
LIGHT
C
HECKLIST
A
DJUSTMENTS
D
URING THE
T
EST
F
LIGHT
Transmitter and Receiver batteries are fully
charged.
The gyro mounting pads are in good condi-
tion.
The gyro wiring has some slack in it and all
wires are clear of the main frame.
Power on the transmitter and receiver. Allow
the gyro to initialize.
The GY701 servo type parameter matches
the servo you are using.
The Tail rotor servo arm is perpendicular to
the pushrod and the pitch slider is centered.
The servo does not bind when full left or full
right tail rotor is applied.
The gyro is operating in the correct mode
(AVCS or Normal).
The tail rotor stick operates the tail rotor the
correct direction.
The gyro compensates the correct direction
when the helicopter is rotated.
The gain is set correctly and the gyro oper-
ates in the correct mode (AVCS or Normal)
in every ight condition.
WARNING
Always make small (1%) adjustments to the tail
rotor D/R or EPA once the value exceeds 100%.
Over 100%, it is possible to exceed the sensor’s
Angular Velocity Sensing Range (+/- 1,200° per
second). The gyro will then no longer control the
pirouette rate or consistency. The pirouette rate
will be extremely fast.
If you experiment with the ultra-fast pirouette rate,
make sure that your flight battery and fuel tank
are secure. Also be certain that your model’s tail
rotor drive train is up to the task.
The Tail Rotor AFR or D/R function within the
transmitter is used to adjust the pirouette rate of
the helicopter. For example at 100% D/R, with the
gyro set to F3C mode, the helicopter will achieve
a 450 deg/sec pirouette rate. If you would like the
model to pirouette faster, then increase the AFR
or D/R. If you would like the model to pirouette
slower, then decrease the AFR or D/R.
The gain should be raised until the tail begins to
oscillate quickly (also called Tail Wag). Once this
point has been achieved, reduce the gain by a cou-
ple of percent and test y the model again. Check
and set the gain for each flight mode. Typically
the gain will be lower for the Idle up 1 and Idle up
2 ight modes due to the higher head speed being
used. The gain for the Hold condition can also
be much higher than other ight modes since the
head speed is lower and the engine vibration is
minimized.
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