With the introduction of the new A3 and S3 series of Waterjets considerable improvements in respect to propulsive efficiency, combined with reduced size and weight plus lower levels of noise and vibration have been achieved. Reliability is improved through an increase in bearing capability and good load distribution. The improved cavitation characteristics of the new S3/A3 pump unit allows smaller waterjets to be installed, usually a reduction of one or two frame sizes for equivalent performance. This can lead to a positive design spiral for the vessel as a whole; lower waterjet weight and less engine power means reduced machinery weight, plus a lighter fuel load for a given range. The result is either a more economical vessel on a given route, or one with more performance with less installed power.
展开▼
