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Transmission Efficiency Measurements and Correlations with Physical Characteristics of the LubricantData from helicopter transmission efficiency tests were compared to physical properties of the eleven lubricants used in those tests. The tests were conducted with the OH-58 helicopter main rotor transmission. Efficiencies ranged from 98.3 to 98.8 percent. The data was examined for correlation of physical properties with efficiency. There was a reasonable correlation of efficiency with absolute viscosity if the viscosity was first corrected for temperature and pressure in the lubricated contact. Between lubricants, efficiency did not correlate well with viscosity at atmospheric pressure. Between lubricants, efficiency did not correlate well with calculated lubricant film forming capacity. Bench type sliding friction and wear measurements could not be correlated to transmission efficiency and component wear.
Document ID
19840022224
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Coy, J. J.
(NASA Lewis Research Center Cleveland, OH, United States)
Mitchell, A. M.
(NASA Lewis Research Center Cleveland, OH, United States)
Hamrock, B. J.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1984
Subject Category
Mechanical Engineering
Report/Patent Number
NAS 1.15:83740
AD-A149179
E-2167
USAAVSCOM-TR-84-C-11
NASA-TM-83740
Meeting Information
Meeting: Symp. of the Propulsion and Energetics Panel on Gears and Transmission Systems for Helicopters and Turboprops,
Location: Lisbon
Country: Portugal
Start Date: October 8, 1984
End Date: October 12, 1984
Sponsors: AGARD
Accession Number
84N30293
Funding Number(s)
PROJECT: RTOP 505-40-42
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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