No. 313: Investigation in N.A.C.A. 20-ft. propeller research tunnel, of Whirlwind J-5 engine with several forms and degrees of cowling mounted on nose of cabin fuselage; cooling, drag, and flight tests made; effect of cowling on propulsive efficiency determined with metal propeller; cowling entirely covering engine reduces drag 2.6 times and seems entirely practical as regards both cooling and maintenance; with cabin fuselages substantial increase in high speed was obtained. No. 314: Results of second portion of investigation of Whirlwind engine cowling in 20-ft. propeller-research tunnel; tests with individual fairings behind cylinders, individual hoods over cylinders, and new N.A.C.A. complete cowling; reduction in drag with complete cowling over that with conventional cowling is greater with smaller bodies than with cabin fuselage; gain in case of completely cowled nacelle is over twice that with cabin fuselage; results of flight tests. (See also Nat. Advisory Committee for Aeronautics -- Reports nos, 313 and 314 1929 22 pp., 33 figs; Aviation, vol. 26, no. 7, Feb. 16, 1929; (Aeronautical Eng. sec.), pp. 24-27, 7 figs.; Aircraft Eng., vol. 1, no. 2, Apr. 1929, pp. 58-60, 5 figs.; Aeroplane, vol. 36, no. 17, Apr. 24, 1929 (Aeronautical Eng. Supp.), pp. 653-656, 4 figs.; discussion by H. Chase in Automotive Industries, vol. 60, no. 15, Apr. 13, 1929, pp. 590-592, 5 figs)


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    Title :

    Drag and cooling with various forms of cowling for a whirlwind radial air cooled engine


    Additional title:

    Notizario Tecnico di Aeronautica


    Contributors:
    Weick, F.E. (author)

    Published in:

    Publication date :

    1929


    Size :

    35 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English