Wageningen Propeller: B4-70
1.0 to 1.1
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) | num blades (dimensionless) | open water efficiency (dimensionless) | pitch diameter ratio (dimensionless) | standard |
|---|---|---|---|---|---|---|---|---|
| B4-70 | 1.0 | 0.01894 | 0.0744 | 0.7 | 4 | 0.6259 | 1 | Oosterveld & van Oossanen (1975) Int.Shipbuild.Prog. Vol.22 No.251; Barnitsas et al. (1981) Report 292 |
| B4-70 | 1.1 | 0.01255 | 0.0115 | 0.7 | 4 | 0.1603 | 1 | Oosterveld & van Oossanen (1975) Int.Shipbuild.Prog. Vol.22 No.251; Barnitsas et al. (1981) Report 292 |
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