ArduPilot Radio Control Mapping

Channel 1 = Roll
Channel 2 = Pitch
Channel 3 = Throttle
Channel 4 = Yaw

const AP_Param::GroupInfo RCMapper::var_info[] PROGMEM = {
AP_GROUPINFO("ROLL", 0, RCMapper, _ch_roll, 1),
AP_GROUPINFO("PITCH", 1, RCMapper, _ch_pitch, 2),
AP_GROUPINFO("THROTTLE", 2, RCMapper, _ch_throttle, 3),
AP_GROUPINFO("YAW", 3, RCMapper, _ch_yaw, 4),
AP_GROUPEND
};