Thrust Deduction - Holtrop Approximation

Thrust-deduction fraction t from the Holtrop-Mennen resistance regression - used to convert propeller thrust to ship resistance.

ThrustPropellerHoltrop

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Formula, assumptions, and limits

t \approx 0.25 C_B - 0.015 + 0.001 \cdot \frac{B}{L} \cdot 100

Symbol	Meaning	Unit
$C_B$	Block coefficient
$B/L$	Beam-length ratio

Source: Holtrop J. - Int. Shipbuilding Progress 1984

Thrust-deduction fraction t from the Holtrop-Mennen resistance regression - used to convert propeller thrust to ship resistance.