This paper presents various methods for describing propeller blade geometry using non-cylindrical blade sections. The coordinates of these sections are easily determined from the traditional set of radially-varying geometric parameters such as chord, camber, thickness, pitch, skew, and rake, in addition to a set of axisymmetric surfaces on which the blade sections are generated. Basic equations and numerical procedures are presented for various methods. One particular method, which uses constant pitch angle as a basis for generating the section nose-tail line, is recommended over the others since it is a reasonable compromise between simplicity and allowing for rational interpretation of the section geometric parameters. Some practical examples are provided.

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