Copter: fixed order of motor setup

ArduCopter/radio.cpp

@@ -48,9 +48,15 @@ void Copter::init_rc_in()
  // init_rc_out -- initialise motors and check if pilot wants to perform ESC calibration
 void Copter::init_rc_out()
 {
-    motors->set_update_rate(g.rc_speed);
     motors->set_loop_rate(scheduler.get_loop_rate_hz());
     motors->init((AP_Motors::motor_frame_class)g2.frame_class.get(), (AP_Motors::motor_frame_type)g.frame_type.get());
+
+    // enable aux servos to cope with multiple output channels per motor
+    SRV_Channels::enable_aux_servos();
+
+    // update rate must be set after motors->init() to allow for motor mapping
+    motors->set_update_rate(g.rc_speed);
+
 #if FRAME_CONFIG != HELI_FRAME
     motors->set_throttle_range(channel_throttle->get_radio_min(), channel_throttle->get_radio_max());
 #else