Sprag Overriding Aircraft Clutch

Abstract

The purpose of this program was to investigate the performance of high-speed overrunning clutch assemblies for use in a multiengine helicopter. The design operating conditions were 3,570 inch-pounds torque transmitted at 26, 500 rpm. Two clutch configurations with differing design philosophies were evaluated. One design utilizes inner and outer sprag retainers with a central energizing ribbon spring. The other design positions the sprags with one retainer and incorporates garter springs at the sprag edges. An analysis of high-speed sprag clutch operation was performed, and a computer program was developed as an initial step to provide a mathematical model of clutch operation reflecting modern, high-speed mechanical component technology.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1972
Accession Number
AD0747807

Entities

People

  • A. G. Meyer
  • P. Lynwander
  • S. Chachakis

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Assembly
  • Bearing Races
  • Bearings
  • Center Of Gravity
  • Centrifugal Force
  • Computer Programs
  • Detectors
  • Engineering Drawings
  • Friction
  • Geometry
  • Heat Treatment
  • Lepidoptera
  • Lubricants
  • Lubrication
  • Measurement
  • Test Facilities
  • Turbines

Readers

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