Shaft horse power (SHP) vs delivered horse power (DHP) accounting for bearing losses, gearbox / shaft-line transmission.
Formula
$$ DHP = BHP \cdot \eta_{trans} \cdot \eta_{shaft} $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $BHP$ | Brake horse power | kW | engine shaft |
| $SHP$ | Shaft horse power | kW | after gearbox |
| $DHP$ | Delivered horse power | kW | propeller hub |
Sources
- Harrington - Marine Engineering.