Purpose of test was to compare six well-known airfoils, the R.A.F. 15, U.S.A. 5, U.S.A. 27, U.S.A. 35-B, Clark Y, and Go ttingen 387, fitted to Sperry Messenger model, at full-scale Reynolds number as obtained in variable-density wind tunnel of Nat. Advisory Comm. for Aeronautics; and to determine scale effect on model equipped with all details of actual airplane; results show large decrease in minimum drag coefficient upon increasing Reynolds number from one-twentieth to full scale; maximum lift coefficient was increased with increasing scale for all airfoils except Go ttingen 387, for which it was slightly decreased; comparison is made between results of these tests and those obtained from tests made in this tunnel on airfoils alone.


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    Title :

    Air force tests of Sperry messenger model with six sets of wings


    Additional title:

    Nat. Advisory Comm. Aeronautics -- Tech. Notes


    Contributors:


    Publication date :

    1927


    Size :

    20 pages


    Remarks:

    20 Figs.


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English


    Keywords :




    The sperry "messenger" biplane

    Biplane | Engineering Index Backfile | 1921


    The sperry messenger airplane

    Engineering Index Backfile | 1920