One Out ... Two In

Thursday, October 10, 2002
When Dunlap Towing of LaConner, Wash., bought the James T. Quig a couple of years ago, they renamed her the Rosario. Now the good tug is getting a lot more than a name change. The boat, built in the late 1970s or early '80's, originally had a single engine installed but she had been designed with enough beam for a twin engine installation. She has been operated with a single 900 hp main but now she will get two Cummins KTA38 main engines to be operated at 800 hp each to nearly double the boat's output to 1,600 hp. The beamy 64 x 21-ft. boat can easily handle the two engines. With the beam carried well aft, Dunlap's operations manager Gordon Taylor explains there is lots of space in the lazarette to accommodate the working rams for the twin rudders that will be added behind the two new 70-in. diameter five-blade propellers. The props will be mounted on 6.5-in. shafts coupled to Twin Disc, TD5205, 6:1 ratio gears on the main engines. Calculations show the repowered boat doubling its bollard pull to about 37,000 pounds. The weight of the engines, shafts and gears will also be double that of the single engine, but Taylor doesn't expect more than a couple of inches increase in the draft on her nine-ft. molded depth hull.

Work on the conversion will take place at Dunlap's Everett, Washington facility and at the nearby Hansen Boat Company shipyard this October and November. While the vessel's deck equipment will remain as is, the gen sets will be changed out for new Cummins powered generators.

Maritime Reporter July 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Legal

Harper Government Invests in Naufrage Harbor

The Honorable Gail Shea, Minister of Fisheries and Oceans, announced today an investment to improve safety and working conditions for fishermen at Naufrage Harbor, Prince Edward Island.

Ondimar Firms Order Suezmax Quartet at Navantia

Navantia and Maritime Transport Ondimar LDA (shipping company Ibaizabal Group) today ratified the contracts signed in late June and the financial structure for

Contship Italia Signs Iran MoU

Contship Italia Spa, also on behalf of Eurogate GmbH & Co. KGaA, KG, recently signed a strategic Memorandum of Understanding (M.O.U.) with Sina Port & Marine Company (SPMCO),

Ship Repair & Conversion

Renovated Research Vessel Sets Sail

French scientific research vessel completely renovated in life extension project. French research vessel Marion Dufresne II left Damen Shiprepair Dunkerque (part

Renovated Marion Dufresne II sets sail on time

French scientific research vessel completely renovated in life extension project The renowned French research vessel, Marion Dufresne II left Damen Shiprepair

Strategic Marine’s Stock Program Full Power Ahead

Strategic Marine, the specialist shipbuilder and fabricator, has confirmed its stock program of personnel transport vessels is market-ready. “Our stock program

 
 
Maritime Security Maritime Standards Naval Architecture Navigation Offshore Oil Pipelines Pod Propulsion Ship Electronics Ship Simulators Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1208 sec (8 req/sec)