The torsional deflection of the blades of three full-scale duralumin propellers operating under various loading conditions was measured by a light-beam method. Angular bending deflections were also obtained as an incidental part of the study. The deflection measurements showed that the usual present-day type of propeller blades twisted but a negligible amount under ordinary flight conditions. A maximum deflection of about 1/10th of a degree was found at V/nD of 0.3 and a smaller deflection at higher values of V/nD for the station at 0.70 radius. These deflections are much smaller than would be expected from earlier tests, but the light-beam method is considered to be much more accurate than the direct-reading transit method used in the previous tests.


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    Title :

    The Torsional and Bending Deflection of Full-Scale Duralumin Propeller Blades under Normal Operating Conditions, Special Report


    Contributors:

    Publication date :

    1938-03-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English







    The duralumin propeller

    Svehla, G. | Engineering Index Backfile | 1929


    Duralumin

    Unger, E. / Schmidt, E. | Engineering Index Backfile | 1920