This document presents methods of predicting propulsor efficiency and weight for preliminary design purposes. Knowing the thrust required, and taking the working area of the propulsor as an independent variable, the propulsive efficiency, and hence the power required, can be computed. The designer will then select a rotational tip speed (which, in air, largely defines his noise levels and, in water, is subject to cavitation and structural strength limitations) and so determine torque. For air propulsors, the accuracy of the performance method given in this document will degrade as the tip speed approaches the speed of sound, but such high tip speeds are, in any case, precluded by the need for reasonable noise levels. (Author)


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    Title :

    Advanced Naval Vehicle Concepts Evaluation (ANVCE) Standard Performance and Weights for Propulsors


    Publication date :

    1976


    Size :

    17 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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