Holtrop - Appendage Resistance

Appendage resistance R_APP from Holtrop-Mennen method - typically 3–8 % of bare-hull resistance for merchant ships with bilge keels, rudder, shaft brackets.

HoltropAppendageResistance

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

R_{APP} = R_F \cdot ((1 + k_2) - 1)

Symbol	Meaning	Unit
$R_F$	Bare-hull frictional resistance	kN
$1+k_2$	Appendage form factor

Source: Holtrop J. - ISP 1984

In short

Appendage resistance R_APP from Holtrop-Mennen method - typically 3\u20138 % of bare-hull resistance for merchant ships with bilge keels, rudder, shaft brackets.

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