Wake fraction estimate using Taylor’s empirical relationship with block coefficient - preliminary propeller-design input when model-test data is unavailable.
Formula
$$ w = 0.5 \cdot C_B - 0.05 \ \text{(single)}, \quad w = 0.55 C_B - 0.2 \ \text{(twin)} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $C_B$ | Block coefficient | - | hydrostatics |
| $w$ | Taylor wake fraction | - | Taylor (1943) |
Sources
- Taylor, D.W. - Speed & Power of Ships (1943).