Fail safe attaching parachute model airplane

摘要

PURPOSE:To prevent disabled control by providing two receivers and two batteries connecting to them respectively. CONSTITUTION:When either a receiver 1 or 2 is faulty, for example, the receiver 1 receives a command to return. In this case, the direction lope is for left turning only, the aircraft flies on a desired sky point by controlling the turning radius properly and the altitude is controlled so that the aircraft is not damaged even on landing or falling by using a left turning servo motor 4 and a right elevating angle servo motor 6 and the craft is recovered by stopping the engine by an engine stop servo motor 5. When the receiver 1 is faulty, the receiver 2 controls a left elevating angle servo motor 7, a right turning servo motor 8 and an engine rotation number control servo motor 9 to recover the aircraft. When any of batteries 11, 12, 13 and 14 is worn out, the aircraft is recovered by applying the similar control. Thus, disabled control is prevented even when a trouble takes place to a part of the controller.