Page 39: of Maritime Reporter Magazine (May 2004)

Propulsion Technology

VSP: Same Power, 9% More Bollard Pull

With the commissioning of the Norway's Bukser og

Berging Voith Water Tractor Baut. the improved char- acteristics of the new Voith Schneider Propeller (VSP) blades were demonstrated. The bollard pull — as supervised by DNV — was improved by nine percent while using the same input power.

The VSP is designed to provide accurate, stepless and extremely swift thrust variations in accordance with XY coordinates. In order to improve the hydrody- namic characteristics of the VSP further, a new gener- ation of blades has been developed. The basis for the successful development is the numeric simulation of the fluid dynamics (CFD = Computational Fluid

Dynamics). The CFD method initially serves to opti- mize the shape of the propeller blade; it also provides the exact loads for the structural and mechanical opti- mization by using the Finite Element Method (FEM).

The new VSP blades for the propeller size 36R6/255- 2 represent an important step towards the further improvement of the hydromechanics of Voith

Schneider Propellers.

For new propellers, the new profiles will be standard; any further improvements can be realized with imme- diate effect. Voith, founded in 1867. has a long history in the marine propulsion field. With 24,000 employees and annual sales of about $3 billion, it is one of the largest of Europe's family-owned companies.

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Below: A CAD illustration of the new VSP size 36R6/255-2 with a propeller input power of 3380kW.

Top Right: Blade after machining.

Now with leak detection"

Smart Radar Level

Sensor with Generic

RS485 Output

The first flat array antenna for liquid tank gauging.

This software driven array allows for each sensor to remotely configure itself for the type of product as well as the structural characteristics within each tank. It is completely self-diagnostic and is factory calibrated using a laser interferometer to ,1mm. It is designed for the harshest environments and can be provided in a high temperature version to 385°F. It is intrinsically safe with Class 1, Div. 1,

Group D & C approvals. As a smart sensor, all processing calculations and software are resident in the device itself, only a high level generic data output, i.e., RS485 (or others on request) is sent to the cargo control area.

Options: • Multiple alarm set-points • Temperature • PV Pressure • I.G. Pressure • Tank Management Software • Automated draft and trim s

Call today for more information!

ELECTRONIC MARINE

SYSTEMS, INC. 800 Ferndale Place

Rahway, NJ 07065 732.382.4344 732.388.5111 fax [email protected] e-mail http://www.emsmarcon.com

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May 2004 35

MARINE HAZARD RESPONSE CROWLEY MARINE POLLUTION CONTROL

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