Re: Do airliner engens run at approximately constant speed, varying only torque?

From: (SteveL3081)
Organization: America Online, Inc. (1-800-827-6364)
Date:         17 Aug 95 04:58:45 
References:   1
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Engine speed varies directly with the throttle setting.  Fan blades do
not change pitch.  Compression ratio also varies with throttle setting.
Efficiencies with any heat engine are best at the highest compression
ratio/combustion temperature.