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    Negative Thrust and Torque Characteristics of an Adjustable-Pitch Metal Propeller (1934)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This report presents the results of a series of negative thrust and torque measurements made with a 4 foot diameter model of a conventional aluminum-alloy propeller. The tests were made in the 20-foot propeller-research tunnel of the National Advisory Committee for Aeronautics. The results show that the negative thrust is considerably affected by the shape and size of the body behind the propeller, that the maximum negative thrust increases with decrease in blade-angle setting, and that the drag of a locked propeller may be greatly reduced by feathering it into the wind. Several examples of possible applications of the data are given.
    Type: NACA-TR-464
    Format: application/pdf
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