General

The basic unit for offshore thruster

applications is a compact unit and

includes:

• L-drive with integrated steering gear

• Nozzle (tilted or non-tilted)

• FP propeller for variable speed electric

drive

• Hydraulic steering gear

It is suitable for various applications

including underwater mounting

This compact construction gives

advantages for mounting at the shipyard

as well as during routine maintenance.

Fact Sheet

Basic Rolls-Royce offshore thruster unit

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Typical applications

• Semi-sub drilling rig/ships

• Production vessels

• Other large vessels

Fact Sheet

Rolls-Royce Oy AbP. O. Box 220, FIN-26101, Finland Tel: +358 2 83791 Fax: +358 2 8379 4800Rolls-Royce Marine AS, Propulsion - UlsteinvikP.O. Box 158, N-6067 Ulsteinvik, NorwayTel.: +47 70 01 40 00 Fax: +47 70 01 40 17www.rolls-royce.com

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© 2013 Rolls-Royce plcWhilst this information is given in good faith, no warranty or representation is given concerning such information, which must not be taken as establishing any contractual or other commitment binding upon Rolls-Royce plc or any of its subsidiary or associated companies.

Hydraulic steering system Lubrication system

Closed loop type hydraulic steering system is equipped with one

100% capacity main pump. A stand by pump is optional. The variable

displacement pump has good steering efficiency and minimum

energy losses at low loads. The smooth turning operation is effected

by electrically controlled starting and stopping ramps. The system is

designed to give simultaneously full torque at 2 rpm steering speed

even in crash stop condition.

Lubrication oil is circulated by one 100% lubrication pump. A stand

by pump is optional. The pump is of screw type and thus very silent.

The oil is filtered by duplex (20 microns) filter as well as fine filter

(3 microns) in the by-pass line.

UUC is a modern design for underwater

mounting and demounting.

USE is designed for installation in dry

conditions. This type can be mounted

directly to the hull or on a container.

The container can be either of retrieveable or

retractable type.

USL is a compact design with bottom well

and foundation for vertical drive motor. USL

installation method means wet mounting

from the top through a casing.

Applications

UUC USE USL

Size 305 355 405 455 505

Propeller diameter (m) 3,0 3,2 3,5 3,8 4,1 4,2 4,5

MCR (kW) 3200 3200 3800 4000 4600 4800 5200 5500 6500 6500

Input /rpm) 720 720 720 750 720 750 720 750 600 600

Technical data

The final data is subject to application and to be reconfirmed by Rolls-Royce.