Markey deck machinery for research vessel

27 Aug 2014

Named for the first American woman launched into space aboard the Space Shuttle Challenger, the research vessel Sally Ride was commissioned on 9 August at Dakota Creek Industries in Washington, USA.

Sally Ride is a US Navy Office of Naval Research sponsored Auxiliary General Oceanographic Research Vessel (AGOR-28).

The vessel’s advanced deck machinery will be operated by Scripps Institution of Oceanography personnel during extended scientific missions upon the seven seas. The Sally Ride is outfitted with two Electric Hydrographic Winches, an Electric Anchor Windlass, and a Trawl/Tow Traction Winch System, all of Markey Machinery Company’s, Inc. design.

The hydrographic winches are Markey’s new high performance type CAST-6-125 with active heave compensation controls. These deep sea research winches include a proven motor-powered level wind with pushbutton pitch adjustment for new cable diameters. The shipboard cable pathway leads to articulated launch and recovery cranes for over the side load handling of samplers and instruments. The winches drums carry up to 10,000m of 0.393 inch diameter fibre optic cable. The 125 horsepower motor produces cable pulls of 19,825lbs at bare drum and 10,000lbs at full drum.

Sally Ride’s Trawl/Tow Traction Winch System is the all-electric Markey type DETW-9/11-48 supporting coring, trawling, towing, dredging, ROV, and other scientific operations. The system integrates the DETW-9/11-48 Electric Traction Winch, a DESR-11-48, and a DESR-9-30 Electric Storage Reels with local and remote controls and digital all-electric AC- variable frequency drives. The Sally Ride is scheduled to sail loaded with 39,370ft of 9/16” 3×19 torque-resistant wire and 32,808ft of 0.680 inch electrical-mechanical cable or 0.681 inch fibre optic cable. Each traction wheel is powered via a single 75 HP electric motor for 150 HP total performance and the storage reels are powered by single 30 HP electric motor. The system is rated to pull 26,500lbs at 205ft/min and light line pull of 16,500lbs at 300ft/min.

Finally, the Sally Ride uses a Markey type WES-23 two wildcat electric anchor windlass to handle 1-7/16” grade 3 anchor chain. Designed for bolt-down installation, each wildcat on the WES-23 is fitted with a band-type brake, a jaw-type disconnect clutch and two 18” diameter warping heads at each end of the horizontal main shaft. The WES-23 is driven by a 30HP, NEMA-D marine motor that is rated for 30-minutes of continuous duty and fitted with a marine-duty spring-set/electric-release automatic disc-brake. The windlass is certified to meet ABS requirements equivalent to a single chain-pull of 14,200lbs at 30ft/minute and an overload capacity to 21,300lbs.

 

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