Stern gear gives economy to windfarm Workcat

During sea trials the Workcat achieved its targeted fuel efficiency During sea trials the Workcat achieved its targeted fuel efficiency

The latest launch from Blyth Workcats was recently on display at the Seawork exhibition in Southampton.

Clements Engineering has worked with the team at Blyth over many years supplying all their stern gear, shafts and propellers. The team have thus built a good knowledge of this builder, which has been producing successful workboats and catamarans for nearly 24 years.

The Workcat is a 17m long catamaran operated by Wildcat Marine. Designed to be themost efficient yet in terms of hull form and equipment, the results from the sea trials have shown the Workcat has indeed achieved its targeted fuel efficiency.

During the design process Clements Engineering was given the expected weight and waterline length as well as an understanding of the conditions in which the vessel would be expected to operate. Clements then undertook various calculations and the stern gear and propellers were made. They have proved to be spot on the first time they were trialled.

The Workcat has been fitted with two MAN D2848 900hp engines de-rated to 750 hp at 2,100 rpm. These engines combined with the stern gear package have meant that the boat can deliver a consumption figure of 150 litres per hour at 1,800 rpm.

The vessel is intended for windfarm work and has been designed to get to locations at sea as quickly and economically as possible with up to 12 engineers and up to five tonnes of equipment on board.

Once at the windfarm it has to push up and against the platform in various sea states. To maintain full bollard strength, the stern gear had to be designed to give the correct ‘slip’ to maintain the required pressure. At normal running the Workcat achieves 18 to 20 knots with a top speed above 26 knots depending on the tide and conditions.

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