Marine Hull Resistance: planing_hull|Cb0.45|Rn10e7.5
Ship hull resistance coefficients for resistance prediction: ITTC 1957 friction line, Schoenherr line, Holtrop-Mennen form factors, residuary and wave-making resistance coefficients, and total resistance coefficients. Covers displacement monohulls, planing hulls, catamarans, SWATH, sailing yachts, and barges across Froude numbers 0.10–2.00.
| hull type | Froude number | Cf ITTC57 (dimensionless) | Cf Schoenherr (dimensionless) | Reynolds number log10 (dimensionless) | appendage allowance pct (%) | beam draft ratio (dimensionless) | block coefficient Cb (dimensionless) | correlation allowance Ca (dimensionless) | form factor 1 plus k (dimensionless) | length displacement ratio (dimensionless) | notes | residuary resistance coefficient Cr (dimensionless) | roughness allowance Cf (dimensionless) | total resistance coefficient Ct (dimensionless) | wave making coefficient Cw (dimensionless) | wetted surface coefficient (dimensionless) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| planing_hull|Cb0.45|Rn10e7.5 | 0.5 | 0.00228 | 0.00231 | 7.5 | 15 | 3 | 0.45 | 0.00035 | 1.05 | 5 | Pre-planing hump; Froude volume number used for planing hulls; Cf at Re=10^7.5; form factor lower for V-bottom planing hull | 0.0085 | 0.0004 | 0.01298 | 0.0085 | 2.2 |
| planing_hull|Cb0.45|Rn10e7.5 | 0.6 | 0.00228 | 0.00231 | 7.5 | 15 | 3 | 0.45 | 0.00035 | 1.05 | 5 | Transition to semi-planing; drag beginning to decrease after hump | 0.007 | 0.0004 | 0.01148 | 0.007 | 2.2 |
| planing_hull|Cb0.45|Rn10e7.5 | 0.7 | 0.00228 | 0.00231 | 7.5 | 15 | 3 | 0.45 | 0.00035 | 1.05 | 5 | Semi-planing; lift developing; drag decreasing | 0.0055 | 0.0004 | 0.00998 | 0.0055 | 2.2 |
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displacement_monohull|Cb0.75|Rn10e8.03 rowsdisplacement_monohull|Cb0.60|Rn10e8.03 rowsdisplacement_monohull|Cb0.68|Rn10e7.53 rowsdisplacement_monohull|Cb0.56|Rn10e8.33 rowsdisplacement_monohull|Cb0.82|Rn10e8.53 rowsplaning_hull|Cb0.42|Rn10e7.03 rowscatamaran|Cb0.50|Rn10e8.03 rowscatamaran|Cb0.48|Rn10e7.53 rowsSWATH|Cb0.45|Rn10e8.03 rowssailing_yacht|Cb0.38|Rn10e7.03 rowsbarge|Cb0.90|Rn10e8.03 rows