The fully-featured control system supplied by Kongsberg Maritime will use the latest technology, including joystick control and automatic position keeping. The outer engines will drive steerable and reversible jets, while the centre engines will operate as booster units. On board Skyfall, the four S90-4 steel series waterjets will be teamed with four engines delivering a total of 22,000 horsepower. Waterjets also have the benefit of eliminating shaft and propeller noise and – because they avoid the varying torques associated with propellers – there is no risk of overloading the engines, lengthening their life. These advantages, combined with low vibration levels and extremely shallow draught, make our waterjets an attractive concept for superyacht propulsion, enabling owners to benefit from comfort, safety and reliable operation.” Their compact reversing buckets and steering nozzles enable superior position keeping and manoeuvrability at both high and low speeds. Tommi Viiperi, General Manager, Sales – EMEA, Kongsberg Maritime, explains: “ Our type S90-4 waterjets offer the best efficiency and durability on the market thanks to their innovative mixed-flow pumps, delivering maximum performance for minimum weight. The use of waterjets on Skyfall reduces vibration by up to 40% compared with a conventional shaft drive, and has allowed the 60m yacht to be designed with a draught of less than three metres – impossible with propellers, which would have required diameters exceeding this figure to absorb the available horsepower.
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