On the Hybrid Tilt-Wing/Tilt-Propeller Active Flow Control Enabled Runway Independent Airplane

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The extremely short takeoffs of the V-22 from the USS Iwo-Jima when its rotors were tilted forward by 19º relative to the traditional 88o used in hover, inspired a series of wind tunnel tests simulating the phenomenon that enabled the V-22 to takeoff within 30ft of run distance (only ½ of its body length. It transpired that the download force that normally consumes 12-13% of the rotor thrust was substantially reduced by the tilt forward of the rotor, while the Suck-Back (SB, lift force in wind tunnel coordinates) was increased. The introduction of Active Flow Control (AFC) reduced the download even more while increasing the SB. This suggested that a hybrid AFC augmented airplane configuration consisting of fixed wing attached to a fuselage and a tilt wing attached to the rotor or nacelle are most effective in hover. Namely, it can carry more weight per installed thrust. When some of these ideas were tested on a powered model in hover, its download was reduced by approximately 60% relative to an identical tilt rotor model in the absence of AFC.

Original languageEnglish (US)
Title of host publicationAIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624106101
DOIs
StatePublished - 2021
Externally publishedYes
EventAIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021 - Virtual, Online
Duration: Aug 2 2021Aug 6 2021

Publication series

NameAIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021

Conference

ConferenceAIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021
CityVirtual, Online
Period8/2/218/6/21

ASJC Scopus subject areas

  • Aerospace Engineering
  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering

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