SITL with jsbsim custom aircraft model (F16, Havoc)

We are trying to use a turbine engine aircraft for SITL and cannot seem to interface via MAVProxy or Mission Planner to command the aircraft. The Rascal model appears to be fine for commanding takeoff and assigning waypoint plans. The F16 in particular moves down the runway because the JSBSim script in SIM_JSBSim.cpp has the engine turned on at the beginning of the simulation. We can implement wheel brakes to keep this from happening but we don’t know how to control the aircraft via Mission Planner or MAVProxy to takeoff and follow a flight plan. Please help.

OP here again. We just want to know how to run Ardupilot SITL with a JSBSim turbine aircraft frame. We are not able to control the aircraft via Mission Planner or some other GCS. Can only control the aircraft via the JSBSim script as mentioned before but we need to assess the use of autopilot with the JSBSim aircraft model.