Transmission Thermal Mapping (UH-1 Main Rotor Transmission)

Abstract

The report contains the results of a series of tests conducted to obtain thermal maps of a UH-1 main rotor transmission. The tests were conducted at several torque levels and several stabilized oil-out temperatures. Also, the thermal growth of the transmission cases at selected locations was measured and recorded. The general conclusions of this report are summarized as follows: the major heat generating area was the input spiral bevel pinion and its related bearings; thermal stability could not be attained at full bypass of the oil cooler at 60% torque; thermal gradients indicate that the transmission output mast may be efficiently utilized as a heat sink by pressure wetting the surface.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1973
Accession Number
AD0777803

Entities

People

  • J. H. Drennan
  • R. D. Walker

Organizations

  • Bell Flight

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Cameras
  • Cooling
  • Efficiency
  • Government Procurement
  • Governments
  • Heat Sinks
  • Heat Transfer
  • Heat Transfer Coefficients
  • Infrared Cameras
  • Oil Coolers
  • Photographs
  • Photography
  • Teeth
  • Temperature Gradients
  • Test And Evaluation
  • Test Methods
  • Thermal Stability

Readers

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