| has gloss | eng: Flight envelope protection is a human machine interface extension of an aircraft’s control system that prevents the pilot of an aircraft from making control commands that would force the aircraft to exceed its structural and aerodynamic operating limits. It is used in some form in all modern commercial fly-by-wire aircraft. Its advantage is that it restricts pilots in emergency situations so they can react quickly without endangering the safety of their aircraft. Function Aircraft have a flight envelope that describes its safe performance limits in regard to such things as minimum and maximum operating speeds, and its operating structural strength. Boeing in the Boeing 777 has taken a different approach by allowing the crew to override flight envelope limits using excessive force on the flight controls. |