During 540 stall turns and fast pirouettes, the tail rotor 
absorbs power and the main rotor rpm decays. You can 
compensate for this using the RUDDTHRO mix. By 
adding a throttle value to this mix, when rudder is applied, 
the throttle advances or reduces depending on the desired 
change in rpm. A good starting value would be +15% 
for R (right mixing) and -10% for L (left mixing). You 
should perform final tuning during flight testing. A + value 
increases throttle; a – value decreases throttle.
When doing a roll, flip, or anytime hard-over cyclic is 
used, the main rotor’s rpm can decay due to increased 
loads. You can compensate for this with the AILETHRO, 
and ELEVTHRO mixing. By adding a throttle value 
to these mixes, when Aileron or Elevator Cyclic control 
is applied, the throttle advances to compensate for the 
increase in loading to the engine. A good starting value 
is between 10%–30 % in both directions for both Aileron 
and Elevator. You should perform final tuning during flight 
testing. A + value increases throttle; a – value decreases 
throttle.
Accessing the Cyclic-to-Throttle Function
1. Turn the transmitter switch ON.
2. Press the LIST key to enter Function mode.
3. Move the Selector and highlight the MIX-THRO 
function. Press the Selector to access.
4. Highlight the desired value to be adjusted, and then 
press the Selector to adjust the value as needed.
The X9503 2.4 allows you to select the specific Flight 
modes when the Cyclic-to-Throttle Mixing is active. The 
factory default position is ON for all Flight modes, which 
is not ideal in most cases. As mentioned above, the 
Cyclic-to-Throttle mix is for Stunt (Flight) modes only, so 
you need to select the Cyclic-to-Throttle Mixing for the 
desired flight modes.
5. Highlight the SW SEL for each of the Cyclic-to-
Throttle Mixes to be used.
6. Press the Selector to open the Flight Mode 
options box. Highlight the desired flight mode to be 
set (NRM, ST1, ST2, ST3, ST4, GER), then press 
the Selector to turn the mixing on or off for each of 
the active flight modes.
7. To exit the Cyclic-to-Throttle function, highlight LIST, 
and press to exit.