Page 31: of Maritime Reporter Magazine (March 2003)

Japanese TSL a Reality

The 7.7 ft. diameter Rolls-Royce Kamewa waterjets to power the

Techno Super Liner represents a $7.5 million order, and the largest waterjets ever from the Kamewa brand.

Long discussed as the embodiment of next-genera- tion marine technology, the Japanese "Techno-

Superliner" (TSL) is now a reality. The 14,500 grt TSL will be built from aluminum and measure 460 x 98 ft. (140 x 29.8 m). To be built by Mitsui Engineering and

Shipbuilding's Tamano works for delivery in 2005, the

TSL will be propelled to a service speed of 38 knots via a pair of Rolls-Royce Kamewa VLW J235 water- jets, which will absorb 27 MW of power. The ship will carry 700 passengers and cargo along the 1.000 km route between Tokyo and Ogasawara Islands, with its speed helping to cut the journey time from 26 to 16 hours. "This contract is another example of our tech- nological excellence providing our customers with a competitive edge," said Saul Lanyado, Rolls-Royce president - marine. "We have committed to extensive waterjet research, studying powers of up to 50MW to understand the upper limits of power likely to be need- ed for fast vessels in the next few years.

The Kamewa VLW J235s, to be built in

Kristinehamn, Sweden and representing an approxi- mate $7.5 million order, will measure 7.7 ft. (2.3 m) in

New Propulsion Control System from PMC

Prime Mover Controls (PMC) has been a leading supplier of control components and systems, with installations on a wide variety of vessels around the globe. This experience has been leveraged and applied to the develop- ment of the MPC-D sys- tem. The latest digital electronics are utilized along with a LCD panel integrated in each control head. Multiple redundan- cies and features have been implemented to accommodate a wide variety of applications. The design of this system has inherently improved per- formance, reliability and reduced costs.

Circle 199 on Reader Service Card

March 2003 diameter, compared with the current largest Kamewa size of 6.5 ft. (2 m) The VLW J235 is divided into a series of elements. Integrated into the hull structure is the inlet duct. To this and to the transom is bolted the impeller chamber. Outboard of this is the guide vane chamber and the steering and reversing unit, which is operated by a hydraulic steering actuator located inside the vessel and stem that protrudes downward from the compartment over the jet units. The impeller shaft is supported by a water lubricated bearing in the guide- vane chamber, has the seal box at its inboard end on the inlet duct, and is supported within the hull by a split bearing. The massive thrust is taken by a separate thrust block in the hull, connected to the impeller shaft by a stub shaft and coupling.

For additional details on the waterjet

Circle 1 on Reader Service Card

Smart Electronic

Level Switch with

No Moving Parts

The Sea Switch Two was designed and patented for all tank applications. The Sea Switch Two offers a reliable solution for liquid level detection and control for cargo, ballast, and storage tanks, without any moving parts.

The Sea Switch Two uses a fully static system that is based on the propagation of an acoustic wave into a metallic rod. A piezo-electric sensing element produces a wave along the rod. As the liquid reaches the sensing element the oscilla- tion stops and the alarm is activated.

The Sea Switch Two sensor detects high, high- high, or low level in any liquid with an alarm output given by a dry contact or current loop change 6-18 mA. • Easy installation • Self-test built-in • Fully static system - no moving parts

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Circle 279 on Reader Service Card Circle 254 on Reader Service Card 31