HomeCalculatorsWageningen B-series Propeller

Wageningen B-series Propeller

Open-water propeller performance from the classic Wageningen B-series KT-KQ charts - thrust and torque coefficients, efficiency, and required shaft power at a given advance ratio. The universal first-pass tool for screw-propeller sizing.

DesignPropeller

Propeller geometry

Propeller diameter DmPitch ratio P/D–Expanded area ratio A_E/A_O–Number of blades Z–

Operating point

Advance ratio J = Va / (nD)–Shaft rpm nrpm

0.3455–

10·KQ

0.5660–

Open-water efficiency η_O

0.583–

Thrust T

1,542.6kN

Shaft torque Q

1,516.28kN·m

Delivered power P_D

17,466kW

Formula, assumptions, and limits

Wageningen B-series fit KT and KQ as 39-term + 47-term polynomial regressions of J, P/D, A_E/A_O, Z. This calculator exposes a simplified 6-term fit valid for J ∈ [0.4, 1.0], P/D ∈ [0.6, 1.2], A_E/A_O ∈ [0.5, 0.85]; consult the Oosterveld & van Oossanen tables for the full polynomial.