CP Propeller Order To Tacoma Boat/Escher Wyss For Alaska Patrol Vessel

Tacoma Boat / Escher Wyss, Tacoma, Wash., a subsidiary of Tacoma Boatbuilding Company, was recently awarded a $336,175 contract by Nichols Bros. Boat Builders, Inc., Freeland, Wash, to supply two 60-inch-diameter, Tacoma Boat/Escher Wyss controllable- pitch propellers for the state of Alaska fisheries patrol vessel.

The vessel, designed by Jensen Maritime Consultants, Inc., formerly B.F. Jensen and Associates of Seattle, Wash., has an overall length of 121 feet 6 inches, a molded breadth of 28 feet and a depth of 12 feet 6 inches.

Designed for a cruising speed of 15 knots, the vessel is powered by two Detroit Diesel model 16V-149 TI marine engines coupled to Reintjes model WAV 1050 modified marine reduction gears with a 3.5:1 reduction ratio.

Tacoma Boat/Escher Wyss also has under contract eight controllable- pitch propellers to be installed on four twin-screw, 245- foot patrol chaser missile vessels (PCG) for the U.S. Navy, and eight controllable-pitch propellers for four twin-screw, 270-foot medium endurance cutters (WMEC) for the U.S. Coast Guard.

Extensive testing of the first shipset of PCG propellers has been s u c c e s s f u l l y completed.

These propellers, 9 feet in diameter, and designed to absorb 11,500 horsepower each at 350 rpm, have been spin tested f o r 300 hours continuously at various speed increments up to 385 rpm.

The WMEC propellers, also 9 feet in diameter, and rated f o r 3,500 horsepower at 260 rpm, have a requirement of spin testing only the first shaft line with Write 339 on Reader Service Card the remaining systems to be functionally tested. Testing on these propellers has been ongoing over the past several months.

The test facility included in the operations is capable of spin testing propellers up to 16 feet in diameter at rated speed, and with maximum weights of approximately 400,000 pounds.

The Alaska fisheries patrol vessel CP propellers are scheduled for delivery in April of 1982.

Maritime Reporter Magazine, page 35,  Nov 1981

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Maritime Reporter

First published in 1881 Maritime Reporter is the world's largest audited circulation publication serving the global maritime industry.