Results of flight tests of the performance and cooling characteristics of three NACA D cowlings and of a conventional NACA D cowling on the XP-42 airplane are summarized and compared. The D cowling is, in general, characterized by the use of an annular inlet and diffuser section for the engine-cooling air. The D cowlings tested were a long-nose high-inlet-velocity cowling, a short-nose high-inlet-velocity cowling, and a short-nose low inlet-velocity cowling. The use of wide-chord propeller cuffs or an axial-flow fan with the D cowlings increased the cooling pressure recoveries in the climb condition at the expense of some of the improvement in speed.


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    Title :

    Review of Flight Tests of NACA C and D Cowlings on the XP-42 Airplane


    Contributors:

    Publication date :

    1943-01-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English



    Review of flight tests of NACA C and D cowlings on XP-42 airplane

    Johnston, J.F. | Engineering Index Backfile | 1943





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