A theoretical analysis provides numerical values of the correction factor. The results indicate that at high speeds the corrections are the same as those for a wing, but that at low speeds, for the cases considered, there is a large tunnel-induced upwash at the rotor. Increasing the rotor size decreases the correction factors for wide wind tunnels but has little effect upon the correction factors in deep narrow wind tunnels. The corrections are equivalent to a wind-tunnel-induced rate of climb (or sink), and considerable care will be required in the application to very low speed flight conditions. (Author)


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    Title :

    Jet-Boundary Corrections for Lifting Rotors Centered in Rectangular Wind Tunnels


    Contributors:

    Publication date :

    1960


    Size :

    65 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English