A method of height adjustment for unpowered emergency landing

The aircraft needs to adjust its heading angle to go to the landing window after the loss of thrust. However, the actual height of the aircraft within the landing area may be higher than that of the landing window. In order to ensure a safe landing, a spiral drop is needed to lose height. Through some certain integer rings of spiral, the aircraft will fall into the landing window. On this stage of height loss, this paper proposes a method of height adjustment to make the aircraft land exactly into the window. This method can get the desired bank angle through calculating the height difference between the height in the landing area, where the aircraft is, and the height of the landing window. This bank angle ensures the aircraft just to go through exactly the landing window in integer spiral rings of falls. Finally through simulation, this paper tests the effectiveness of the method.