Wageningen Propeller: B4-55
Wageningen B-series ship propeller open-water characteristics — thrust coefficient KT, torque coefficient KQ, and open-water efficiency eta_0 as functions of advance ratio J for six series designations (B3-50, B4-55, B4-70, B5-60, B5-75, B6-80) at pitch-diameter ratio P/D=1.0. Computed from the Oosterveld & van Oossanen (1975) polynomial regression equations. Used for ship powering calculations, propeller selection, cavitation assessment, and hull-propeller interaction studies.
| propeller series | advance ratio J | KQ (dimensionless) | KT (dimensionless) | blade area ratio (dimensionless) | notes | num blades (dimensionless) | open water efficiency (dimensionless) | pitch diameter ratio (dimensionless) |
|---|---|---|---|---|---|---|---|---|
| B4-55 | 0.0 | 0.05538 | 0.4258 | 0.55 | Zero advance (bollard pull condition) P/D=1.0 | 4 | 0 | 1 |
| B4-55 | 0.1 | 0.05249 | 0.4004 | 0.55 | J=0.1 | 4 | 0.1213 | 1 |
| B4-55 | 0.2 | 0.04936 | 0.3725 | 0.55 | J=0.2 | 4 | 0.2411 | 1 |
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