Fitting a nozzle increases the thrust at relatively low ship speeds. Significant savings can be achieved in terms of fuel consumption, depending on the number of revolutions and the capacity of the motor.
The improved Wärtsilä high efficiency nozzle, type HR an HP, combined with a Wärtsilä propeller, can produce up to 10% more thrust than conventional nozzles, both in bollard pull and in free sailing condition. The nozzle profile offers a double profiled cross section (outside and innerside). This sophisticated shape improves the water flow both into and out of the nozzle, increasing thrust performance.
