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 Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter July 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Legal

Bahri Q2 Net Profit Soars

National Shipping Company of Saudi Arabia (Bahri), the exclusive oil-shipper for Saudi Aramco, reported a 47.2 percent increase in second-quarter net profit on Tuesday.

U.S. Backs S. China Sea Bilateral Talks

U.S. Secretary of State Kerry says backs bilateral talks; Philippines says dispute does not involve United States. U.S. Secretary of State John Kerry said on

Samil PwC Okays Hyundai's Management Improvement Plan

Hyundai Heavy Industries (HHI) is notified by Samil PwC, a local member of the global accounting firm PwC, that its 3.5 trillion won worth management improvement

Ship Repair & Conversion

Ecofix Filler Coat Cuts Rudder Repairs Cost

With an increasing trend for thruster and rudder manufacturers finishing their products with self-cleaning protective hard coatings, Antwerp headquartered Subsea

Quick Propeller Repair Prevents Drydocking

Recently a team of Hydrex diver/technicians performed a propeller blade cropping on a 190-meter container bulker berthed in Hamburg. Two parts of the tip of one

NASSCO Bags USS Oak Hill Modification Award

General Dynamics NASSCO-Norfolk was awarded a $42 million cost-plus-award-fee modification to a previously awarded contract for the repair and alteration for the USS Oak Hill (LSD-51).

 
 
Maritime Careers / Shipboard Positions Maritime Standards Naval Architecture Pipelines Pod Propulsion Port Authority Salvage Ship Repair Ship Simulators Shipbuilding / Vessel Construction
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: 0.0681 sec (15 req/sec)