Page 41: of Maritime Reporter Magazine (September 2004)

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Becker Kort Rudder Nozzles for Improved

Maneuverability

Becker Kort nozzles are designed to give increased propulsive efficiency from the propeller that is surrounded by the nozzle. This results from the water being directed towards the propeller in a more uniform stream. Compared with what hap- pens with a free propeller, the static pull can be up to 45 percent greater, with the result that a smaller main engine can be used. Furthermore, the nozzle structure of the Kort system protects the propeller from damage.

In order to improve the steerage capability of the vessels, Becker Marine Systems has equipped its

Kort nozzles with a movable flap at the nozzle out- let.

Because of the movable Becker flap at the end of a rudder nozzle, the transverse force produced is on average up to 45 percent more than with fixed fins, resulting in an increase in vessel steerage capacity.

The Becker flap, designed for very high perform- ance, has a high transfer ratio, contributing to the fact that only small rudder angles are necessary to produce large transverse forces. At cruising speed helm angles can be reduced by up to 50 percent, compared with the fixed fin. The average turning circle is reduced and manoeuvrability improved since the nozzle thrust is not set to "propulsion".

With tip clearances remaining the same, smaller rudder angles produce a better propeller environ- ment, resulting in reduced vibrations. In addition, there is also optimum water inflow, achieving an even greater level of efficiency. The life expectan- cy of the nozzles is thus increased and fuel savings result.

Practical Use

The Becker Kort nozzles are mainly used for ves- sels with a top speed of up to 16 knots. But Kort nozzles are also advantageous in the case of faster vessels that, for example, fish at a lower speed on reaching their destination. As the vessels can turn more quickly it becomes easier for them to pursue shoals of fish. In particular, heavily laden ships with full sterns can profit from the short design of the Becker nozzle, since the restricted aft-end space does not have to be filled with a nozzle and an addi- tional rudder. When the nozzle and the rudder are set too closely together, this results in poor nozzle inflow, reduced efficiency and increased vibrations, as well as greater wear.

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MTU Celebrates Historic Date

MTU Friedrichshafen celebrated the 125th birth- day of its company founder. Karl Maybach, with a commemorative celebration in Factory 1 on July 6, 2004. Maybach is one of the founding fathers of the Maybach Motorenbau engine manufacturers, the predecessor company of MTU Friedrichshafen.

Thus, essentially, Maybach as inventor and design- er gets the credit for the high-performance, diesel engines that are built in Friedrichshafen. "The fac- tory that Karl Maybach established here in 1912 has continuously grown and has brought

Friedrichshafen and the surrounding area more and more jobs," said Irmjjard Schmid-Maybach, daughter of Karl Maybach and Supervisory Board member of MTU Friedrichshafen.

Dr. Rolf A. Hanssen, Chairman of MTU's Board of Management and head of DaimlerChrysler Oil-

Highway, said, "Karl Maybach considerably expanded the product range of Maybach

Motorenbau in the diesel engine sector. These engines were used for a number of applications, above all in the marine and railway sectors. Thus,

Karl Maybach established the foundation for fur- ther development that led to the creation of MTU and our drive systems for the navy, electric power generation, industry, railway, and military vehi- cles."

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Shaping the future in tank gauging Saab TankRadar® STaR—safety, trust and reliability.

Take a closer look inside Saab

TankRadar STaR, our new tank gauging system. This is the first time Level Gauging, High Level and Overfill Alarm systems are integrated in one single unit- designed as independent, intrinsically safe measur- ing channels. All functions are radar-based, taking full advantage of the benefits of radar technology- increasing safety and reliability.

There is no longer a need for an overfill alarm fit- ted separately from the gauging unit, which means easier installation, simplified cabling and reduced maintenance requirements.

Saab TankRadar STaR is the latest proof of our technology leadership. This innovative 3-in-1 system brings intelligence and integration to all types of cargo and tanker applications.

For product information: www.saa brosemount.com

Phone: -46 31 3370 000

E-mail: saies.srm 2 emersonprocess.com

EMERSON

Process Management

EMERSON. CONSIDER IT SOLVED". 40

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