June 9, 2009
Wärtsilä combines its ship design units
A compact, 35 m, high performance escort tug is one of the first designs to be developed by Wärtsilä Ship Design -- a new unit that combines all Wärtsilä ship design units into a single entity. The units involved include the recently acquired naval architect companies Vik-Sandvik of Norway, Conan Wu & Associates (CWA) of Singapore, and SCHIFFKO of Germany, as well as the company's conceptual ship design unit in Finland.
The new Wärtsilä Ship Design will generate a variety of new designs, from simple, low-cost, standard vessels to more high-end, ground-breaking tonnage. Wärtsilä expects to increase its share of the ship design market, with the main focus being on a full design scope approach.
"There will be close collaboration between our Ship Design unit, other parts of the Ship Power organization, and other Wärtsilä businesses. Our long term ambition is to create standard proven designs with predefined solutions, and to provide operational services with performance guarantees and fixed prices. This may also include extended services, such as yard selection and supervision support in the construction phase," says Arne Birkeland, Vice President, Ship Design, Wärtsilä Ship Power.
"We will gradually launch a series of designs developed as a result of the knowledge sharing between the different units, and these will be branded as Wärtsilä Ship Designs," said Birkeland.
The first of these designs, the W Tug 80, is capable of carrying out ship assist duties at offshore terminals, as well as high-speed escorting, push-pull operations, and coastal towing.
Designed for 80 ton bollard pull, the tug can attain a speed of 14.5 knots. Due to its compact size and two Wärtsilä steerable thrusters,it is highly maneuverable. The rounded bow profile with moderate flare is optimized for pushing and reduces the risk of slamming.
A large skeg, combined with the forward hull shape, results in a steering force of 250 ton during escorting.
The tug is powered by two 8-cylinder in-line Wärtsilä 26 engines, each rated at 2600kW at 1000rpm. A modular propulsion concept with various engine arrangements can be configured within the same basic design.
Towage and escorting duties are provided for with a forward 112 t towing/anchor winch. A 91 t towing winch is sited aft of the superstructure. The tug can be equipped for fire-fighting duties, and can operate 200 nautical miles from the coastline.