Speed, Power, And Drag Measurements of Dolphins and Porpoises

  • Lang T
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Abstract

Various ITlethods of ITleasuring the speed, power, and drag of free-swiITlITling dolphins and porpoises are discussed. Results of several kinds of tests conducted in the 1960' s with three species of dolphins and porpoises are presented and analyzed. The ITlaxi-ITlUITl ITleasured speed was 11. 05 ITl/sec (21. 4 knots), which was reduced with exertion tiITle period. Free-riding and thrust-aided swiITlITling is discussed. The theoretical pressure distribution on fin cross-sections of three species is analyzed froITl several viewpoints, including cavitation and its iITlplications on top speed.

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Lang, T. G. (1975). Speed, Power, And Drag Measurements of Dolphins and Porpoises. In Swimming and Flying in Nature (pp. 553–572). Springer US. https://doi.org/10.1007/978-1-4757-1326-8_5

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