Anchor winch for new 'Arctic Prowler'
JK Fabrication’s DNV Type-Approved 40-30-3000 Anchor Winch
JK Fabrication’s 40-30-3000-DNV series Anchor Winch has been installed aboard the F/V Arctic Prowler, the new state of the art longliner for Alaska Longline Co. located in Petersburg Alaska.
Culminating a two-year process, JK’s Clutched-series winch was at last awarded DNV Type Approval in April 2014.
Conceived by JK’s founder, Jim Kreider, the anchor winch accommodates 950 ft of 1 1/8” wire rope and a single shot (90 ft) of 1 3/16” Grade 2 stud-link chain, developing 33,400lbs line pull bare drum, for an anchor weighing as much as 3200lbs. There is also an independent warping head with 16,000lbs line pull. Retrieval speeds are 23 FPM bare drum, and 50 FPM full-drum.
DNV inspectors insisted on a very rigorous pull-test for Type Approval - and the test in fact inadvertently revealed an anchor winch far stronger than even Mr Kreider had foreseen.
“We were told that the winch would have to withstand a 92,400lbs pull test against the positive dog mechanism. Imagine our surprise when the winch in fact withstood a 138,000lbs pull test, which parted the 1 1/8” wire but did not damage the winch,” said Mr Kreider. “Naval architect Bruce Culver estimates the winch could withstand 230,000lbs.”
The C-series winch has a variety of technical features that ensure a working lifetime of reliable use. There is a double reduction drive train for the DT White hydraulic motor, and a 3-position marinized-equipped Bi-Directional control valve that provides steady control for hauling and setting.
A unique JK design feature is a common enclosed oil bath for chain, brake, hydraulic motor, and clutch. Compact in design, the winch is just 52” high by 53” deep, with a width of 47” (76” overall width to outside of warping head). Noting that the winch weighs in at just 3,800lbs, Mr Kreider remarked that “winch manufacturers today must achieve the same or better performance criteria, while capturing weight and footprint reduction on deck.”
Well-known among the Seattle-based fishing fleet working Alaska and the West coast, JK Fabrication absorbed key staff and Intellectual Property from Nordic Machine in 2002. Thus JK’s arsenal of designs includes the entire Nordic Machinery line, long considered the state-of-the-art for a range of line haulers, crab and salmon deck equipment, some of them dating all the way back to the 1940s. JK now manufactures in galvanized and stainless steel, as well as aluminium for smaller boat applications, including yachts.
“The Arctic Prowler order is a great honour, since the vessel as a whole has many state-of-the-art approaches that could well set the standard for new longliners in the years to come,” said Mr Kreider. “Given that this first-ever DNV Type-Approved product, we fully expect to see other orders, including those outside the fishing industry.”