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Variable Pitch Ducted Fans for STOL Transport Aircraft FREE

[+] Author Affiliations
R. M. Denning

Rolls-Royce (1971) Ltd., Filton, Bristol, England

Paper No. 72-GT-61, pp. V001T01A060; 11 pages
doi:10.1115/72-GT-61
From:
  • ASME 1972 International Gas Turbine and Fluids Engineering Conference and Products Show
  • ASME 1972 International Gas Turbine and Fluids Engineering Conference and Products Show
  • San Francisco, California, USA, March 26–30, 1972
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7981-8
  • Copyright © 1972 by ASME

abstract

The Variable Pitch fan has a number of features which make it attractive as the basis for ultra-high bypass ratio ducted fans designed primarily for STOL aircraft. The variability imposes certain design constraints, particularly on fan pressure ratio, and leads to differences in engine geometry relative to equivalent fixed pitch engines. The merits of such engines are discussed under the headings of Performance, Noise, Engine Control, Thrust Modulation, Provision of Air Bleed for High Lift, Reverse Thrust and Development Flexibility.

Copyright © 1972 by ASME
Topics: Fans , Aircraft
This article is only available in the PDF format.

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