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7.6 METHOD OF CALCULATIONS
Shaft power is calculated from the measured torque and the revolutions of the shaft.
Shaft power
∙
9.945
P = Shaft power [kW]
M = Torque [kNm]
n = rotations per minute [rpm]
Total energy is calculated from the integrating shaft power over time
Total energy
∆∙∆
E = Total energy [kWh]
The thrust quotient indicates the amount of thrust generated per MW propulsion power. The thrust
quotient is an indicator of propeller efficiency. Be aware that propeller thrust and ship speed influence
each other.
Thrust quotient
1000
T = Thrust [kN]
P = Shaft power [kW]
∙
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