User Manual

GYRO SYS. – GYRO SYSTEM
The XP9303 features a very sophisticated gyro gain sensitivity system that allows in-flight
selection of 3 gyro gains for two separate gyros. It provides for fixed gain values as well as a
Stick Override Gain where gyro gain is progressively reduced as the stick is moved further off
center. Stick Override Gain is an absolute "must" for controlling gyros in aerobatic aircraft.
Up to 2 gyros may be used to control two of the three primary flight controls (elevator, rudder, or
aileron). Typical applications involve gyros on the rudder and/or elevator. The FLAP and/or
AUX2 switch can be used to switch between the 3 different gains for each gyro. The gyro gains
can also be controlled by Flight Modes. The gains can be fixed or variable using the Stick
Override Gain feature. If one set of gains for each gyro is set to zero then the gain/gyro can
essentially be switched off during flight.
The AUX2 and AUX3 channels are designated as the only Gyro System channels. If either or
both of these channels is to be used to control a gyro, then they must be set up in the Devic.SEL
function by setting the OUT line to GYRO for these channels. If only 1 gyro is to be used, then
either AUX2 or AUX3 can be designated as such in the Devic.SEL function.
NOTE: This function is designed to be used only with gyros that have in-flight proportional gain
adjustment capability. Single and dual rate gyros that use a potentiometer to adjust the gain will
not work properly with this function.
To access the GYRO System, highlight and select GYRO SYS. in the FUNCTION List.
GYRO CONNECTIONS (Gyro System)
Plug the gain connector of one gyro into the AUX2 port of the receiver. Plug the gain
connector of another gyro (if any) into the AUX3 of the receiver. If only one gyro is to
be used, connect its gain to eitherAUX2 or AUX3.
NOTE: The OUT line at the bottom of the Devic.SEL display must be set to GYRO for
AUX2 and/or AUX3 if they are to be used to control Gyros.
FIXED GYRO GAIN - (Gyro System)
Fixed Gyro Gain does not use the Stick Override feature. Whichever of the 3 gains that
is presently selected remains in effect and moving the control stick does not affect the
gain.
The example below shows only the AUX2 channel designated for Fixed Gyro Gain.
JR XP9303 Detailed Function Descriptions 63