Estimated fuel saving from a Propeller Boss Cap Fin (PBCF) - 3–5 % through hub-vortex elimination, scales with propeller load.
Formula
$$ \Delta m = P_{ME} \cdot H \cdot \frac{\eta_{save} \cdot SFOC}{10^6} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $P_{ME}$ | Main-engine power | kW | engine data |
| $SFOC$ | Specific fuel consumption | g/kWh | engine data |
| $\eta_{save}$ | ESD saving fraction | - | trial data |
Sources
- MOL PBCF technical bulletins.