PBCF - Propeller Boss Cap Fin Savings
Estimated fuel saving from a Propeller Boss Cap Fin (PBCF) - 3–5 % through hub-vortex elimination, scales with propeller load.
Annual fuel saved
324.8t/yr
Annual USD saving
201,376USD
Formula, assumptions, and limits
PBCF payback typically 1–2 years for merchant vessels. Manufacturers include Mitsui OSK Lines / Nakashima. Best gains on heavily-loaded propellers (high K_Q).
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Main-engine power | kW | engine data | |
| Specific fuel consumption | g/kWh | engine data | |
| ESD saving fraction | - | trial data |