Page 43: of Marine News Magazine (February 2020)

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FEATURED BOAT ture three Tier III Cummins QSK60 main engines, turned dent, Karl Senner, said the gearboxes are designed with down to 1,600 revolutions per minute, at 2,000-horse- offsets to best accommodate the main machinery space power each for longevity purposes, Furlong said. and keep ideal spacing of the three propellers (one vertical

Each newbuild will be equipped with three generators offset, one horizontal-left and one horizontal-right offset for redundancy. gearboxes). Karl Senner is also supplying the electronic “CT Marine strives to innovate on every project that throttle and gear control system.

leaves our desk,” said Christian Townsend, owner and Furlong said the vessels will be ? rst in the HFL ? eet

CEO of CT Marine. “The HFL 6000 was born from the to be built by C&C Marine, as well as the ? rst to feature dozen AEP and Pine Bluff 6Ks that were built about a de- double steering rudders behind each wheel (six in total on cade ago. We started with this proven design of more than each vessel), which will improve maneuverability. a million hours and incorporated our latest technologies Townsend explained, “The Twin-Diff ? anking and to the project. Included is our patented Twin-Diff steering steering rudders offer tremendous steering advantages over system and CT28sl Kort Nozzle, which is the second itera- a barn door or ? apped rudder and yields nearly the same tion of our Line Haul Nozzle.” side thrust as a Z-drive. On a modi? cation, we reduce vi-

Each vessel will be out? tted with triple screw, 100-inch bration, save 10-15% in fuel over a single barn door, en- wheels that will be interchangeable with two of HFL’s late able the head of the tow to be brought around without the model 4,000-horsepower boats, longer, ST Louis Ship use of ? anking rudders and increase steering forces consid- type kort nozzles. erably. We do this utilizing the same pumps and rams as a

The towboats will be equipped with three REINTJES single rudder system.”

WAF 1173 reverse reduction gearboxes at 7.429:1 reduc- “Our latest steering, we feel, is the most important ad- tion, con? gured with internal hydraulic multidisc shaft vancement that we have achieved since opening 55 years brakes and supplied by Karl Senner, LLC, whose Presi- ago,” Townsend said. He noted that CT Marine has been

Credit: CT Marine 43 www.marinelink.com MN