DEVELOPMENT OF HIGH PERFORMANCE ROTARY WING, TIPMOUNTED PULSE-JET ENGINE COMPONENTS

Abstract

A 35% increase in cooling air inlet duct area increased the structural strength of the conical engines. Aluminum proved inadequate for fabrication of the cooling air baffle. The XPJ-49-AH-1 (AJ-7.5) inlet valve was tested 38 hrs. without failure. The valve tensiometer was fabricated, and the spring elements were calibrated. A set of lower frequency reeds and a multiple-pointfuel- injection system were designed and fabricated for the 10.0-in.-diam.engine. The thrust performance of 4 cowling configurations was evaluated and the high-speed superiority of the short-lip circular type proven. Three designs of 6.75-in.- diam. development engines, as well as the XPJ-43-AH-1 (AJ-9.4) and XPJ-49-AH-1 (AJ-7.5) engines, were tested at high tip speeds on the special low-g test stand. The XPJ-43-AH-1 engine was tested to 450 ft./sec. and the smaller engines were tested to 550 ft./sec. The altitude effect on cowling parameters, inlet valve parameters, venturi parameters and tube geometry was investigated.

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Document Details

Document Type
Technical Report
Publication Date
Nov 15, 1952
Accession Number
AD0001642

Entities

People

  • W. K. Barrett

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Altitude
  • Aluminum
  • Contracts
  • Diameters
  • Engine Components
  • Engines
  • Fabrication
  • Frequency
  • Fuel Injection
  • Fuel Injectors
  • Jet Engines
  • National Security
  • Resonant Frequency
  • Security
  • Test And Evaluation
  • Test Stands

Readers

  • Aerospace Engineering
  • Internal Combustion Engine (ICE) Technology.
  • Thermal Physics or Thermal Science.