出典:Wikipedia
出典:『Wikipedia』 (2011/04/20 16:46 UTC 版)
The Energy Efficient Engine was a program funded by NASA in the 70's to develop technologies suitable for energy efficient turbofans. 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.