Results of steady-state reverse and forward-to-reverse thrust transient performance tests are presented. The original QCSEE 4-segment variable fan nozzle was retested in reverse and compared with a continuous, 30-deg half-angle conical exlet. Data indicated that the significantly more stable, higher pressure recovery flow with the fixed 30-deg exlet resulted in lower engine vibrations, lower fan blade stress and approximately a 20% improvement in reverse thrust. Objective reverse thrust of 35% of takeoff thrust was reached. Thrust response of less than 1.5 sec was achieved for the approach and the takeoff-to-reverse thrust transients.
Reverse thrust performance of the QCSEE variable pitch turbofan engine
Aerospace Congress and Exposition ; 1980 ; Los Angeles, CA
1980-10-01
Conference paper
No indication
English
Reverse Thrust Performance of the QCSEE Variable Pitch Turbofan Engine
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