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Wake Fraction - Taylor Approximation

Wake fraction estimate using Taylor's empirical relationship with block coefficient - preliminary propeller-design input when model-test data is unavailable.

WakePropellerTaylor
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Formula, assumptions, and limits

w=0.5CB0.05 (single),w=0.55CB0.2 (twin)w = 0.5 \cdot C_B - 0.05 \ \text{(single)}, \quad w = 0.55 C_B - 0.2 \ \text{(twin)}
SymbolMeaningUnit
CBC_BBlock coefficient
wwTaylor wake fraction

Source: Taylor, D.W. - Speed & Power of Ships (1943)

In short

Wake fraction estimate using Taylor's empirical relationship with block coefficient - preliminary propeller-design input when model-test data is unavailable.

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