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

Legal

LCA Sees Progress on Great Lakes Issues

Prospects for ending the dredging crisis and resolving other pressing issues on the Great Lakes are the best in 12 years according to Lake Carriers’ Association (LCA),

Baltic Exchange Eyes Move into Commodities

Baltex reaches breakeven level since start of 2015; Baltic previously faced broker opposition over platform. London's Baltic Exchange is studying a potential

Woman Airlifted offshore Palm Beach Gardens, Florida

A rescue helicopter crew from Coast Guard Air Station Miami medically evacuated a woman 98 nautical miles northeast of Palm Beach Gardens, Florida, Sunday. Watchstanders

Ship Repair & Conversion

Tanker Converted to LNG-electric Propulsion

Bergen Tankers’ 95-meter-long chemical and product tanker Bergen Viking has returned to service following its conversion from diesel-electric to liquefied natural gas (LNG)-electric propulsion.

Australian Navy Awards In-service Support Contract

The Australian Government informs it has awarded a $60.6 million in-service support contract for maintenance of the Bay-Class Landing Ship Dock, HMAS Choules, over the next two years.

Submarine INS Sindhukirti to Boost Indian Navy's Fleet

Submarine INS Sindhukirti set for final "full-power trials" from Friday after being stuck in a refit for a decade. The Kilo-class submarine is expected to be formally

 
 
Maritime Careers / Shipboard Positions Maritime Security Offshore Oil Pod Propulsion Salvage Ship Electronics Ship Repair Ship Simulators Sonar Winch
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: 0.1193 sec (8 req/sec)