The AlliedSignal Bendix Trophy
For Aviation Safety 1999

presented to

Leonard M. Greene
Safe Flight Instrument Corporation

For invention and implementation of revolutionary safety devices during his career of more than 50 years as an aerodynamicist, engineering test pilot, specialist in aircraft performance and control, and theoretician in supersonic flight.

Mr. Greene’s stall warning indicator has been instrumental in the reduction of airplane accidents since the 1940s — when more than half of all deaths in aviation were caused by stall/spin accidents — by helping pilots to recognize imminent stalls.

He later pioneered the development of angle-of-attack indication and coefficient-of-lift displays; approach indicators and landing indicators that show slow/fast/on-speed conditions; takeoff computers and go-around computers that use angle-of-attack-based pitch (attitude) commands; and automatic throttle systems that use angle-of-attack guidance and coefficient-of-lift guidance. He also developed speed command of attitude and thrust (SCAT), which computes an aircraft’s optimum flight path.

In the mid-1970s, Mr. Greene applied his knowledge of lift instrumentation and associated warning devices to develop an airborne wind shear warning system, providing aural alerts to flight crews as an aircraft enters atmospheric conditions involving hazardous wind shear during takeoff and landing. The system — refined to provide flight director display of precise attitude guidance to obtain the optimal flight path for the wind shear escape maneuver, and rotation guidance during the takeoff roll — has received more than 50 type certifications.

Flight Safety Foundation and the award’s sponsor, AlliedSignal, are pleased to recognize Leonard Greene for his contributions to aviation safety.

FSF 52nd International Air Safety Seminar
Rio de Janeiro, Brazil
November 10, 1999

Stuart Matthews
Chairman, President and CEO
Flight Safety Foundation

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