Page 32: of Maritime Reporter Magazine (October 1997)

WORKBOAT ANNUAL (Continued from page 30)

Thruster design which operates in compass as well as tunnel thruster modes. The Z-drives will each be driven by a Caterpillar 3512 high- speed diesels rated for 1,210 hp at 1,600 rpm. The stern-mounted Z- drives are installed with hull mounting modules designed and built by Ulstein. The units feature open fixed pitch propellers of 1,829 mm diameter optimized for opera- tion at an estimated vessel service speed of 12 knots. Also fitted are multi-plate hydraulic clutches and

Ulstein's new Z-drive steering pump PTO drive.

Ulstein Maritime has delivered two model 1650H Z-drive thrusters to tug Namahoe, operating in the

Hawaiian Islands. Owned by

Smith Maritime, the tug is used for inter-island towing and ship assist.

Namahoe's propulsion system consists of two Ulstein 1650H Z- drive thrusters with 86 in. fixed

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Circle 328 on Reader Service Card pitch propellers moderating skew for smooth operation and high thrust in bollard condition. The propellers were designed by

Nautican Research and manufac- tured by Finnscrew.

The 1650H model is the first of

Ulstein's new modularization arrangement. According to the company, the goal of this arrange- ment is to drive systems, reduce installation complexity and cost and simplify maintenance. A key feature of this concept is that the main steering pump is gear-driven by the Z-Drive upper gearbox, per- mitting the steering control sys- tem to be mounted on the drive with no components located else- where on the vessel.

Namahoe's 1650H features an upper gearbox reduction ratio of 2.7 and a lower gearbox ratio of 2.1, reducing the 1,600 rpm input to a speed of 291 rpm. The 1650 has a maximum rating of 2,400 hp and can accept any input speed from 700 to 2,100 rpm. The vessel also features Ulstein's Z-Con elec- tronic remote propulsion control system, an electronic analogue control which reportedly exceeds

ABS, Lloyd's Register and all other class society requirements.

For more information on Ulstein

Circle 44 on Reader Service Card

Deere Delivers Diesel Line

Deere Power Systems Group offers five marine diesel engines in 3.9, 4.5, 6.8 and 7.6 L configura- tions, with horsepower ratings from 71 to 300 for propulsion applications. Multiple horsepower ratings are available for each engine. ABS certification is avail- able as an option for engines at a rating of 250 hp.

For more information on Deere

Circle 26 on Reader Service Card

Newpark Aquires Platzer,

Forms Greens Bayou

The majority shareholders and management of Newpark

Shipbuilding and Repair, Inc. have acquired certain assets of Platzer

Shipyard, Inc. The new company