DeJong Designs Biggest Voith Schneider Tug Built In United States

The biggest tug with Voith Schneider propulsion units to be built in the United States has been designed by the Jacksonville, Fla., firm of Norman N. De- Jong and Associates, Inc., naval architects and marine engineers. Destined for ship-handling duties in the Panama Canal, the 105- foot "Water Tractor" is being built by Thunderbolt Marine Industries in Thunderbolt, Ga., for the Panama Canal Company. Delivery is slated for May 1981.

DeJong finished the design and submitted detailed drawings for the tug in November. The project is return business for the firm, it also having designed the multidirectional s h i p - h a n d l i n g tugs built by Thunderbolt for the Canal Company four years ago.

Utilizing unique cyclodial propellers for maximum maneuverability in ship handling, the tug is powered by two 10-cylinder Fairbanks Morse Model 38D 8% diesel engines driving two Voith Schneider Model 2VSP 30 G II cyclodial propellers. The propellers will provide a bollard pull of 80,000 pounds ahead and astern, and 60,000 pounds sideways.

Other major equipment includes two GM Detroit Diesel 6-71/75- kw generators, GM Detroit Diesel 8V71 driven fire pump, Markey hydraulic capstans, and Consolect s w i t c h b o a r d and engine room monitoring system. An extensive engine room acoustical insulation system will keep the noise level in working areas under 80 decibels. Building on its experience with the Voith Schneider system, De- Jong and Associates is presently d e s i g n i n g two 120-foot Voith Schneider propelled tugs as part of an integrated tug/barge project. For more information,

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