The X9503 2.4 offers two different types of Gyro Gain 
Sensitivity Adjustments: manual or automatic. This 
feature gives the user the choice of selecting gyro 
sensitivity through the rudder dual rate switch (AUX-2) or 
automatically through the flight mode switch. The Gyro 
Gain function allows you to have 2 different gyro gain 
settings in Manual (RUDD D/R) mode, and 3 separate 
gain settings in AUTO Mode.
If you select manual mode (RUDD D/R), you must use 
the Rudder D/R switch to make gain changes.
If you select Auto mode, the Gyro gain is automatically 
changed by linking directly to the Flight Mode switch.
If you do not intend to use this function, leave this 
operation at the factory default position (OFF).
1. Turn the transmitter ON.
2. Press the LIST key to enter the Function mode.
3. Using the Selector, highlight the GYRO SENS function 
then press to access.
4. Highlight INH with the Selector, and then press to 
open the options box. Highlight the desired function 
type Manual (RUDD D/R) or AUTO, then press the 
Selector to select.
5. Highlight the function to be adjusted.
6. Press the Selector to select the gain position to be 
adjusted, and then roll the Selector to increase or 
decrease the gain values as needed.
7. If you select AUTO mode after setting the gain 
values for positions 0, 1 and 2, move the Selector 
to highlight the mode positions (NORM, ST-1, and 
ST-2), and select the gain position (value) for each 
mode.
8. To exit the Gyro Gain function, move the Selector to 
highlight LIST, and press.
Connect the gain lead to the AUX2 channel of the receiver, 
and the black connector to the rudder channel.
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 cannot utilize 
this function.
The X9503 2.4’s Cyclic-to-Throttle function corrects any 
under- or over-speeding of the main rotor resulting from 
load changes placed upon the engine when an Aileron, 
Elevator, or Rudder control is given.
Mixing – Cyclic-to-Throttle Mixing
The most common use for Cyclic-to-Throttle mixing is for 
Stunt Modes 1-4, allowing the main rotor rpm to remain 
consistent throughout aerobatic and 3D maneuvers. It is 
not necessary to use Cyclic-to-Throttle mixing in Hover 
(Normal) mode since control inputs are generally small 
and much less aggressive.
Note: If using a Governor for rpm control, it is not 
necessary to use the Cyclic-to-Throttle Mixing, 
and all values should be left at the factory default 
position (0%).