Fixed temperature maintenance system for engine in unmanned aircraft having automatic throttle limiting device

A system for maintaining a constant temperature of an engine in an unmanned aerial system, comprising:

• an autopilot for issuing a throttle command;
• and
• an autothrottle limiting device for automatically limiting an upper limit of the throttle command issued by the autopilot, based on an engine internal temperature fed back to the autothrottle limiting device from the engine;
• wherein the autothrottle limiting device comprises
• an autothrottle command value receiver for receiving an autothrottle command value from the autopilot;
• an autothrottle limited value subtraction unit for subtracting an autothrottle limited value from the autothrottle command value;
• an engine temperature receiver for continuously receiving the engine internal temperature of the engine;
• a limited operating temperature setting and switching unit for setting and switching a limited operating temperature for the engine internal temperature so as to operate the autothrottle limiting device;
• an engine maximum internal temperature limiter for limiting a maximum value of the engine internal temperature fed back to and received in the engine temperature receiver;
• and
• an autothrottle limited value calculator for calculating the autothrottle limited value by multiplying the engine internal temperature, of which the maximum value is limited, and a gain value.