Efficiency Study Comparing Two Helicopter Planetary Reduction Stages

Abstract

A study was conducted to compare the efficiency of two helicopter transmission planetary reduction stages. Experimental measurements and analytical predictions were made. The analytical predicted and experiments verified that one planetary stage was a more efficient design due to the type of planet bearing used in the stage. The effects of torque, speed, lubricant type, and lubricant temperature on planetary efficiency are discussed. Keywords: Gears, Transmission, Efficiency, Power loss.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1990
Accession Number
ADA224966

Entities

People

  • Robert F. Handschuh
  • Timothy L. Krantz

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Army Aviation
  • Bearings
  • Computer Programs
  • Computers
  • Flow Rate
  • Friction
  • Gears
  • Helicopters
  • Instrumentation
  • Lubricants
  • Lubrication
  • Mainframe Computers
  • Measurement
  • Measuring Instruments
  • Roller Bearings
  • Strain Gages
  • Turbines

Fields of Study

  • Physics

Readers

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