SHP vs DHP - Transmission Efficiency

Shaft horse power (SHP) vs delivered horse power (DHP) accounting for bearing losses, gearbox / shaft-line transmission.

SHPDHPTransmission

Brake powerkWTransmission eff%Shaft-bearing eff%

SHP (at pod): 9,800kW

DHP (propeller delivered): 9,702kW

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

DHP = BHP \cdot \eta_{trans} \cdot \eta_{shaft}

Symbol	Meaning	Unit
$BHP$	Brake horse power	kW
$SHP$	Shaft horse power	kW
$DHP$	Delivered horse power	kW

Source: Harrington - Marine Engineering

In short

Shaft horse power (SHP) vs delivered horse power (DHP) accounting for bearing losses, gearbox / shaft-line transmission.

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