Transmission Efficiency Measurements and Correlations with Physical Characteristics of the Lubricant.

Abstract

Data from helicopter transmission efficiency tests have been 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.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1984
Accession Number
ADA149179

Entities

People

  • A. M. Mitchell
  • B. J. Hamrock
  • J. J. Coy

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Barometric Pressure
  • Bearings
  • Chemical Properties
  • Friction
  • Heat Exchangers
  • Lubricants
  • Lubrication
  • Materials
  • Measurement
  • Physical Properties
  • Plastic Explosives
  • Sliding Friction
  • Synthetic Lubricants
  • Synthetic Oils
  • Test Stands
  • Turbines

Readers

  • Theoretical Analysis.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).