the flight plan for this flight was to be flying in a Boeing 737-800 at 30,000 ft and are speed was planned for 450 knots. So I was turning the auto throttle nob for the auto pilot and then it got stuck at 392. In other words it would not turn when it got to 392 it would go to 391 and 390 and so on but not 393 or 450. Does X-plane 11 only simulate up to 392 knots? Or is there a way to make it go higher.