Closed-form Harvald estimate of the Taylor wake fraction w from block coefficient - single- and twin-screw variants.
Formula
$$ w_\text{single} = 0.5 C_B - 0.05, \quad w_\text{twin} = 0.25 C_B - 0.05 $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $C_B$ | Block coefficient | - | hydrostatic table |
| $w$ | Taylor wake fraction | - | result |
| $t$ | Thrust deduction (correlated) | - | result |
Sources
- Harvald - Resistance and Propulsion of Ships (1983).