Energy–maneuverability theory is a model of aircraft performance. It was developed by Col. John Boyd, and is useful in describing an aircraft's performance as the total of kinetic and potential energies or aircraft specific energy. It relates the thrust, weight, drag, wing area, and other flight characteristics of an aircraft into a quantitative model. This allows combat capabilities of various aircraft or prospective design trade-offs to be predicted and compared.
Specific Excess Energy (PsubS) is:
V=Velocity T=Thrust D=Drag W=Weight
Boyd, a U.S. jet fighter pilot in the Korean War, began developing the theory in the early 1960s. He teamed with mathematician Thomas Christie at Eglin Air Force Base to use the base's high-speed computer to compare the performance envelopes of U.S. and Soviet aircraft from the Korean and Vietnam Wars. They completed a two-volume report on their studies in 1964. Energy Maneuverability came to be accepted within the U.S. Air Force and brought about improvements in the requirements for the F-15 Eagle and later the F-16 Fighting Falcon fighters.
- Jenkins, Dennis R. McDonnell Douglas F-15 Eagle, Supreme Heavy-Weight Fighter, p.7. Aerofax, 1998.
- Hammond, Grant T. The Mind of War: John Boyd and American Security. Washington, D.C.: Smithsonian Institution Press, 2001. ISBN 1-56098-941-6 and ISBN 1-58834-178-X.
- Coram, Robert. Boyd: The Fighter Pilot Who Changed the Art of War. New York: Back Bay Books, 2002. ISBN 0-316-88146-5 and ISBN 0-316-79688-3.
- Wendl, M.J., G.G. Grose, J.L. Porter, and V.R. Pruitt. Flight/Propulsion Control Integration Aspects of Energy Management. Society of Automotive Engineers, 1974, p. 740480.
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