Online SDS calculator
With our Online Surface Drives SDS calculator, you can simulate all your projects easily !
Surface Drive System are adapted for planing hull boat type (from 8 to 40m boat). Feel free to fill in your boat technical information, our simulator will calculate the torque and estimate the appropriate model for your boat.
This program does not make any speed prediction.
To get a performance calculation contact us , our engineering team will be glad to support your on your project.
Note that this calculator is only a simulation, please fill in the QUOTATION INQUIRY for a complete study including expected performances and SDS model selection.
If your vessel requires more than a pair of drives, please contact us, we will be pleased to offer a customized complete marine transmissions package.
See technical information for your Surface Drive System model
A suitable Surface Drive System model for your application
Engine torque calculation
All engine manufacturers supply the engine power curve, look at the
maximum power and maximum revolution.
Example : 420 horsepower @ 3300 rpm.
The torque is : T (kg.m) = 716,2 x Power (hp) / Revolutions ( Revs/min)
In that case the engine torque is : T = 716,2 x 420 / 3300 = 91,15 kg.m
Drive input torque
The torque to be used for drive selection is the input torque, so the engine
torque has to be multiplied by the gear ratio.
T final = ENGINE TORQUE x GEAR RATIO
Check the table for the suitable model
Maximum torque chart Kg/m
For surface piercing propeller calculation, please contact us.