Wärtsilä transverse/tunnel thrusters WTT

Wärtsilä transverse thrusters (WTT), also known as tunnel, bow or stern thrusters, provide side force for mooring, harbour manoeuvring and station keeping. They combine compact dimensions with a high thrust-to-diameter ratio.

Range

• 400 kW to 5,500 kW
• Types include CT/FT125 H, CT/FT150 H, WTT-11, WTT-14, WTT-16, WTT-21, WTT-24, WTT-28, WTT-32, WTT-36, WTT-40, WTT-45 and CT3500
• Ratings for manoeuvring (AUX) use or dynamic positioning (DP) use; maximum power applies to uni-directional rotation

Key features

• Integrated hydraulics and fine filtration for longer gear and bearing life
• 15% reduced CAPEX per kW compared with a standard Wärtsilä transverse thruster of the same propeller diameter
• Compatible with environmentally acceptable lubricants (EAL) for US EPA VGP 2013 and DNV CLEAN notation compliance
• Wärtsilä ProTouch controls with bus connections for integration with control, monitoring and alarm systems
• Over 3,250 units delivered or on order, including over 1,250 in the merchant segment

Options

• Controllable or fixed pitch propeller up to WTT-40; CP propeller for WTT-45 and CT3500
• Redundant pumps and/or lubrication filters
• Face type seal or air barrier seal for WTT-21 and up
• Tailor-made tunnel cut to the hull form, with additional stiffeners
• L-drive with intermediate shaft and separate e-motor foundation
• Demountable, low-noise horizontal drive variants
• Package with electric motor and starter
• Elogrid tunnel grid, designed to save fuel in transit without loss of thrust

Applications

Merchant vessels, cruise vessels, offshore support vessels and offshore construction vessels.