Map RC/Servo Channels on MIssion Planner to JSBSIM model

Hello all,

I developed a custom plane on JSBSIM/FlightGear by editting the default Rascal model and bringing in additional functions like retractable landing gear that I can operate with keyboard strokes in FlightGear.

I also managed to run successful autonomous SITL simulations driving the plane with the Mission Planner. However, one thing I could not figure out is how to map a random servo channel in ArduPlane to a specific function in FlightGear, i.e. the retractable landing gear.

Does any one have any tip or example for how this is supposed to be done in the JSBSim xml code?