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Old 10-06-2004, 02:56 AM
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Kreso Kreso is offline
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Offsets of Bp-delta diagrams

Hi, I would like to make program for propeller calc. by Bp-delta method, and I was wondering if anybody has OFFSETS of Bp-delta diagrams in some text file.
Kreso
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Old 10-06-2004, 10:00 AM
jehardiman jehardiman is online now
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Most people I know of that used Bp-delta (or one of the many other variations of this nomenclature) didgitized thier lookup tables.

The most accessable way I can think of if someone will not come forward with a set (have you contacted all the major NA universities?) is to use the Kt-Kq data in the 1988 edition of PNA and convert to Bp-delta (see p 190-202, in Vol II). Otherwise, get a copy of "Fundamentals of Ship Resistance and Propulsion; Part B: Propulsion" NSMB publication 132a by Van Manen (try University Microfilms, Ann Arbor, Michigan, as it was a reprint text for UofM, NAME) In this text Van Manen develops the coefficients for a few of the B-series propellers, but not all.
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