Flight Envelope Protection

Flight Envelope Protection (FEP) is an advanced aircraft control technology designed to prevent pilots from exceeding safe operating limits during flight. By continuously monitoring parameters such as airspeed, altitude, angle of attack, load factor, and aircraft attitude, FEP systems automatically provide control inputs or limit commands to keep the aircraft within its safe flight envelope. This technology plays a critical role in modern fly-by-wire aircraft, improving stability, reducing pilot workload, and preventing dangerous conditions such as stalls, overspeed, excessive bank angles, and structural stress. Used in commercial aviation, military aircraft, and unmanned aerial systems (UAS), Flight Envelope Protection combines sensors, flight computers, and control algorithms to enhance operational safety. As aviation moves toward autonomous flight and advanced air mobility, FEP technology continues to be a key component in reliable and intelligent aircraft systems.