3000-HP Roller Gear Transmission Development Program. Volume I. Summary Report.

Abstract

This report presents a summary of the 3000-HP Roller Gear Transmission Development Program. During this program a helicopter transmission employing a 19.85:1 reduction ratio roller gear unit as the final reduction stage was designed, manufactured, and subjected to extensive testing. On the basis of the results of this program, it has been determined that the roller gear is a viable concept for use in helicopter transmissions. Among the advantages it offers are compactness and high efficiency. The roller gear unit has the potential to offer weight savings over conventional type planetaries for reduction ratios greater than 12:1. The roller gear unit is, however, considerably more costly than conventional planetaries. Quality control of the electron-beam welds used in the fabrication of the roller gear components remains a problem. Detailed reports on the design, manufacture, bench testing, aircraft tiedown testing, and reliability and maintainability of the roller gear transmission have been published separately. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1977
Accession Number
ADA037308

Entities

People

  • G. F. Gardner
  • K. R. Cormier

Organizations

  • United Technologies Corporation

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Airframes
  • Bench Tests
  • Control Systems
  • Fabrication
  • Failure Mode And Effect Analysis
  • Friction
  • Inspection
  • Joints
  • Manufacturing
  • Materials
  • Production
  • Quality Control
  • Reliability
  • Test And Evaluation
  • Test Facilities
  • Turbines

Readers

  • Software Engineering
  • Systems Analysis and Design
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).

Technology Areas

  • Directed Energy
  • Microelectronics