Results are reported of a NASA sponsored analytical investigation into the merits of advanced counter rotation propellers for Mach 0.80 commercial transport application. Propeller and gearbox performance, acoustics, vibration characteristics, weight, cost and maintenance requirements for a variety of design parameters and special features were considered. Fuel savings in the neighborhood of 8 percent relative to single rotation configurations are feasible through swirl recovery and lighter gearboxes. This is the net gain which includes a 5 percent acoustic treatment weight penalty to offset the broader frequency spectrum noise produced by counter rotation blading.
Technology and benefits of aircraft counter rotation propellers
1981-01-01
Conference paper
No indication
English
Noise of counter-rotation propellers
AIAA | 1985
|Noise of counter-rotation propellers
AIAA | 1984
|Acoustic interference of counter-rotation propellers
Tema Archive | 1988
|