Propulsion systems for Navy V/STOL aircraft have unique design requirements from which has emerged a diversity of proposed configurations. During recent years the Lockheed-California Company has been involved in design studies of a split-fan, cross-ducted propulsion system concept that meets the V/STOL requirements with conventional turbofan engine configurations. This concept utilizes fixed engines/nacelles with thrust vectoring for lift, and transfer of engine fan air between variable area nacelle nozzles for aircraft control and trim. A simple, lightweight cross-duct coupling between engines also provides engine-out roll trim, and is adaptable to either a twin or four engine configuration.A joint Lockheed/Navy experimental test program was conducted, utilizing a 0.25 scale propulsion internal flow model, to establish the flow transfer performance and the capability to generate nozzle forces for aircraft thrust, lift, and control. A description of the model, test set-up, and preliminary performance results that demonstrate concept feasibility are presented herein.


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    Title :

    Model Test Results of the Split-Fan Cross-Ducted Propulsion System Concept for Medium Speed V/STOL Aircraft


    Additional title:

    Sae Technical Papers


    Contributors:
    Carlson, J.G. (author) / Baas, J.P. (author) / Beck, W.E. (author)

    Conference:

    Aerospace Congress and Exposition ; 1984



    Publication date :

    1984-10-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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