Energy Efficient Engine
Encyclopedia
The Energy Efficient Engine was a program funded by NASA
in the 70's to develop technologies suitable for energy efficient
turbofan
s. Both General Electric
and Pratt & Whitney
produced turbofans for the program. The GE core featured a 23:1 HP pressure ratio 10 stage HP compressor, later used in the GE90
and GEnx. P&W had a 9 stage HP compressor in their core.
NASA
The National Aeronautics and Space Administration is the agency of the United States government that is responsible for the nation's civilian space program and for aeronautics and aerospace research...
in the 70's to develop technologies suitable for energy efficient
Energy efficiency
Energy efficiency may refer to:*Efficient energy use, sometimes simply called energy efficiency.*Energy conversion efficiency, the ratio between the output and input of an energy conversion machine....
turbofan
Turbofan
The turbofan is a type of airbreathing jet engine that is widely used for aircraft propulsion. A turbofan combines two types of engines, the turbo portion which is a conventional gas turbine engine, and the fan, a propeller-like ducted fan...
s. Both General Electric
General Electric
General Electric Company , or GE, is an American multinational conglomerate corporation incorporated in Schenectady, New York and headquartered in Fairfield, Connecticut, United States...
and Pratt & Whitney
Pratt & Whitney
Pratt & Whitney is a U.S.-based aerospace manufacturer with global service operations. It is a subsidiary of United Technologies Corporation . Pratt & Whitney's aircraft engines are widely used in both civil aviation and military aviation. Its headquarters are in East Hartford, Connecticut, USA...
produced turbofans for the program. The GE core featured a 23:1 HP pressure ratio 10 stage HP compressor, later used in the GE90
General Electric GE90
General Electric GE90 is a family of high-bypass turbofan aircraft engines built by GE Aviation for the Boeing 777, with thrust ratings ranging from 74,000 to 115,000 lbf . It was first introduced in November 1995 on British Airways' 777s, and is available only on the 777...
and GEnx. P&W had a 9 stage HP compressor in their core.