PRELIMINARY DESIGN STUDY OF CONVERTIBLE FAN/SHAFT ENGINES

Abstract

The report presents the results of a study of a large number of conceptual arrangements for a convertible fan/shaft engine applicable to advanced rotary-wing aircraft. Fan/shaft power transfer methods were examined and defined. Various methods of fan unloading to minimize or eliminate thrust at hover and to reduce the parasitic fan power were explored. Engine sizing to meet the dual requirements of shaft power and fan thrust was accomplished, and a control system for coordinating shaft power and fan thrust was defined. Performance is presented for supercharged and nonsupercharged gas generator arrangements with various forms of variable fan geometry and decoupling.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1968
Accession Number
AD0673148

Entities

People

  • C. C. Raymond
  • R. P. Atkinson

Organizations

  • General Motors

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Analog Computers
  • Composite Aircraft
  • Control Systems
  • Fixed Wing Aircraft
  • Flight Speeds
  • Guide Vanes
  • Helicopter Rotors
  • Helicopters
  • High Pressure
  • Propulsion Systems
  • Reliability
  • Rotary Wing Aircraft
  • Turbine Components
  • Turbofan Engines

Readers

  • Aerospace Engineering
  • Systems Analysis and Design