Elliott White Gill Thrusters Offer Excellent Maneuverability With Complete Control
—Literature Available— Elliott Turbomachinery Ltd., a subsidiary of the Elliott Turbomachinery Co. Inc. of Jeannette, Pa., was formed following the parent company's acquisition in 1971 of the marine engineering company J.
Samuel White of Cowes, Isle of Wight.
Since 1964, J. Samuel White had been developing and manufacturing variations of the Gill Thruster, invented in 1921 for river and inland waterways use. Following the development and installation in 1966 of the first "deepsea" marine unit, the Elliott White Gill Thruster has since proved itself over many years in numerous and varied shipboard installations, offering unique advantages Elliott White Gill thrusters provide full continuous thrust through 360 degrees to move a vessel in any desired direction, independently of ship speed.
All units fit flush to the hull, thereby avoiding the risk of collision damage or fouling of underwater obstacles.
Also, the siting of water intakes on the underside of the hull prevents the ingestion of floating debris or intake of air in a heavy sea.
Elliott White Gill bowthrusters may be used as a completely independent means of propulsion and can be powered by any engine or electric motor of the required capacity.
All units are manufactured to the BS5750 standard of quality assurance and consist of an axial flow pump mounted within the hull with only two moving elements—a bronze pump rotor and a cast rotatable vaned discharge deflector. This proven design ensures long life, trouble-free operation and ease of maintenance.
A simple, electrically driven con- trol system allows directional maneuvering from a single control point, eliminating the need to balance control thruster, main engine and rudder simultaneously.
Elliott White Gill thruster systems include many proven advantages: positive thrust trainable throughout 360 degrees; freedom from underwater hazards (including grounding); full submergence (even in heavy seas); simplified maneuvering independent of rudder and main propulsion (capable of auxiliary propulsion); simple rugged construction; versatile applications including shallow draft vessels; only one wet bearing, requiring no attention; no critical oil seals for possible failure; and no need to reverse gearing.
Recent orders include Cable and Wireless (Marine) Ltd.'s new cable ship Sir Eric Sharp, fitted with Elliott White Gill bow and stern thrusters Model 50T3, an identical installation to that fitted in the 1984-built sister vessel Pacific Guardian. The thrusters, operating in conjunction with an advanced dynamic positioning system, enhance the vessel's maneuvering and position- keeping capabilities, particularly while working cable or using the remote-operated cable-handling submersible. These two units complement the 14 Elliott White Gill thrusters supplied to or in service with Cable And Wireless (Marine) Ltd. over the past 20 years.
Also, Elliott Turbomachinery Ltd. has recently received an order for an Elliott White Gill vertical shaft thruster, type 50T3S, to be fitted in the bow of the first of a new class of U.S. Navy Ocean Research Vessels. The vessel, as yet unnamed, is being constructed by the Trinity Marine Group at the Halter Moss Point Shipyard in Escatawpa, Miss.
The 262-1/2-foot vessel, fitted with the Elliott White Gill unit in the bow and twin azimuthing thrusters at the stern, will be equipped with a full dynamic positioning system, and is intended for worldwide operation.
For free literature giving full information on Elliott White Gill bow/stern thruster systems, Circle 14 on Reader Service Card
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