Page 32: of Maritime Reporter Magazine (May 2004)

Propulsion Technology chosen system would be equal to that with similar propulsion units incorporat- ing a single 2,538-mm diameter pro- peller in each case. The STP Twin

Propeller solution therefore obviated the need for an 18-percent larger single pro- peller, and making it possible for cargo- carrying volume to be increased.

Schottel equipment with electric drive was also incorporated in a 94-m ice- breaking supply ship delivered for duties in the shallow waters of the northern Caspian Sea. Built in Norway by Ulstein Verft for BUE Marine of the

UK, the vessel is fitted with two pulling- type Rudderpropellers powered by fre- quency-controlled electric motors.

Schottel propulsors have also been spec- ified for the first diesel-electric offshore supply ships ordered to date for Chinese owners. Diesel-electric propulsion has been selected so far for two in a series of eight 69-m newbuilds entrusted to two

Chinese yards.

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Meanwhile, the German propulsion specialist is chasing fresh business for the Siemens-Schottel Propulsor (SSP) pod series and the in-house developed, smaller Schottel Electric Propulsor (SEP) system, which is due to make its seagoing debut in August 2004. The first operational reference for the SEP will be provided by the German Water Board's 69-m multipurpose newbuild Stephan

Jantzen, installed with two such pods of 1,850-kW apiece. Conceived for oil spill attendance, coastguard and rescue duties in the Baltic, the icebreaking, multi-role vessel is under construction by Peene-

Werft at Wolgast. in the eastern part of

Germany. The two other contracts to date for the SEP system have arisen from the newbuild project for the 94-m ice-fringe research ship Maria S.

Merian, and the Royal Dutch Navy's amphibious transport vessel Johan de

Wit.

The expansion of the traditional

Schottel range in recent years to include large, electric propulsion systems and other equipment was preceded by the takeover of Wismar Propeller- und

Maschinenbau (WPM), and DM20 mil- lion expenditure on the modernization and expansion of production capacity at the Wismar site. The investment has been vindicated, since it has allowed

Schottel to penetrate new areas of the market while reinforcing its position in established sectors. The purchase of

WPM, integrated into the group as

Schottel-Schiffsmachinen, was motivat- ed by the group's development of its product range, and by the space con- straints of Schottel's Spay premises on the Rhine.

The all-undercover Wismar plant, which features two 150-ton gantry cranes, has a considerably greater unit lifting and handling capability than

Spay, and high productivity. The facili- ties include three large assembly pits, an indoor basin for test runs, and a new,

Skoda multipurpose machining station.

The flexible workstation can produce a shaft in one job. the single machine undertaking all turning, boring, gearing and milling. Wismar had concentrated on controllable pitch propeller systems and rudders in the days of WPM, and is now also the production point for

Schottel's largest Rudderpropellers.

While Spay retains a manufacturing role, complemented by its pivotal design function, the group's wholly-owned

Chinese subsidiary at Suzhou has assumed production responsibility for the smallest Rudderpropellers and trans- verse thrusters, plus components for larger systems, serving both the Chinese market and export destinations.

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Maritime Reporter & Engineering News