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Technology and benefits of aircraft counter rotation propellersResults 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.
Document ID
19830002859
Document Type
Conference Paper
Authors
Strack, W. C.
(NASA Lewis Research Center Cleveland, OH, United States)
Knip, G.
(NASA Lewis Research Center Cleveland, OH, United States)
Weisbrich, A. L.
(Hamilton Standard Windsor Locks, Conn., United States)
Godston, J.
(Pratt and Whitney Aircraft East Hartford, Conn., United States)
Bradley, E.
(Lockheed-Georgia Co. Marietta, Ga., United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1981
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
E-1414
NASA-TM-82983
NAS 1.15:82983
Funding Number(s)
PROJECT: RTOP 530-05-12
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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