The General Electric J85 is a small turbojet engine designed for use in military aircraft and drones. First introduced in the 1950s, it has been widely used in various applications, including the Northrop F-5 and the McDonnell Douglas A-4 Skyhawk. The engine is known for its reliability and compact size, making it suitable for light aircraft. With a thrust output of approximately 3,000 pounds, the J85 is capable of providing significant power while maintaining efficiency. Its design features a single-spool configuration and an axial-flow compressor, which contribute to its performance and versatility in different flight conditions.