Ultra-Fast Monohull
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Ultra-Fast Monohull


Ultra-Fast Monohull

Ulstein Nordvestconsult has demonstrated its pro-active approach to the business by developing a ro-ro passenger ferry representing a quantum leap in service speed. This 150m fast monohull design series proposed would offer a combination of capacity and operational flexibility, with remarkable speed-keeping performance, potentially in the very high range of 50knots-60knots.

Its new concept employs a slim monohull, constructed of high-tensile steel with an aluminium alloy superstructure, potentially housing 100MW of raw power and incorporating a deadweight and configuration suited to year-round trading viability as a passenger and freight carrier.The use of a CODAG (combined diesel and gas turbine) power plant enables output to be closely matched to differing speed and scheduling requirements in accordance with daily peaks and seasonal fluctuations in route traffic mixes. It also better meets the vital space and weight criteria for such vessels, given the compact size and concentrated power yield of modern, high-speed diesel engines and gas turbines.

This vessel with its various load permutations to a maximum 1250dwt, and with the versatility and economic credentials to maintain peak season schedules at 60knots and off-season service at 30knots, is at the top end of the proposed range. At the same time, the consultancy has initially worked-up a detailed design for a more modest vessel of 40knots.

Within the same general hull envelope, at proposed main dimensions of 150.5m length overall, 22.4m moulded breadth, and 4m scantling draught, the 40knot ro-pax version would incorporate a 76MW CODAG plant driving two steerable waterjets and two fixed, booster units. In her day ferry and high-season role, she would accommodate 1500 passengers, cars and other vehicles, while her deck configuration and point load ratings would also be conducive to a freight-orientated role at other times. The ro-ro spaces, accessed through a stern ramp of 20.6m width, would permit axle weights of 17.5tonnes and maximum unit weights of 45tonnes.

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