Futaba GY520 User Manual

Page 4

RECAUTIONS

• Only use the GY520 with a 2.4GHz system such as the

Futaba FASST

™

system, or a PCM system. Use with a FM

system is strongly discouraged since interference can
cause serious operational problems. In addition to this
the latest high performance tail rotor servos generate
electrical noise which may also cause interference to an
FM receiver.

• Always ensure that there is some slack in the gyro cables

to help maximize performance. Always use the supplied
gyro mounting pads to attach the gyro to the helicopter
mechanics. Do not use a strap that encompasses the GY520.
This may affect the overall performance of the gyro.

• Always allow the gyro to adjust to the surrounding

environmental temperature before ﬂ ight. A large temperature
change during use will cause drift and other operational issues.

• The GY520 uses a conductive resin case to prevent

electromagnetic interference. Do not allow anything to touch
the gyro case as it may cause a short circuit.

• If you are switching between Normal Mode and AVCS Mode

in flight, please keep in mind that you must have the gyro
re-learn the center position after making a trim change within
the transmitter. To memorize the new center position simply
flip the gain switch on the transmitter three times between
Normal Mode and AVCS Mode within one second. The tail
rotor servo will center indicating that the new center position
has been memorized.

• When the GY520 is used in Nor mal Mode, tail rotor

compensation or revolution mixing must be used within
the transmitter.

Y520 Mnl.indd 4

4/7/2009 7:55:00 AM