Steering a commercial boat or large yacht can be similar to driving a heavy car with bad brakes. Its difficult to stop, and response to the rudder is slow. This poses no problem in the open sea, but it can be real challenge to maneuver the vessel in a congested marina or when docking. This is where a bow thruster comes in.
A bow thruster consists of an open-ended tube that runs through the underwater sections of the hull near the bow and perpendicular to the keel. A propeller mounted at some point inside this tube can rotate in either direction. The helmsman selects the rotational direction and actuates the propeller. As a result, the bow thruster sucks a solid stream of water in one end of the tube and forces it out of the other, pushing the bow sideways and augmenting the rudder to make steering more responsive.
Two Props are better than one
Traditional single propeller systems generate thrust by accelerating water in the axis of the propeller shaft. However, the water discharged
Fishing for Salmon in Alaskas Bristol Bay can be a challenge all by itself. This area is a Sport Fisher-mans paradise so the area is filled with commercial as well as pleasure fishing boats during the season. Being able to maneuver fast in these waters is a plus. Steve Tutt has owned many Jet Propulsion fishing boats and has made a name for himself in this area of the world. Steve has found that Jet Propulsion fishing boats idea for the conditions found in the Bay. One thing Steve found out that fishing in crowded waters can be a bit of an issue with Jet Propulsion. Controlling the Jet Boat and nets in neutral position can be a problem since the boat tends to circle. It would be easy to snag a line or another fishermans net. Steve began looking for solutions to see what could be done.
His efforts first lead him to the option of retrofit-ting one of his boats with a Marine Gear. Although possible the cost would be in the 6K to 8K range plus the cost to retrofit. Besides that the weight
Logan direct drive PTOs are effective and reliable solutions for applications where hydraulic pumps are used in on-demand or intermittent situations. This Lufkin gearbox with live SAE C pad incorporates a Logan 600 series PTO to connect, and disconnect a hydraulic pump which is used to power nets, reels, hoists, anchors, and bow thrusters on a fishing vessel. The ability to engage on-demand limits the amount of fuel and emissions required to power the pump, which is used in application specific tasks. The Logan Softstart feature guarantees smooth engagement at RPMs consistent with the new tier requirements for marine, mobile and industrial engines.
Custom-designed Logan power take-off (PTO) clutches are proving invaluable to clients of Dutch company ADS van Stigt, with a wide variety of applications across the sector.
ADS van Stigt has for some years represented Logan Clutch in the Netherlands and Belgium, supplying Logan equipment to shipbuilders and owners in the region.
As a supplier of propulsion systems and electronic control and monitoring systems, van Stigt provides Logan power take-off (PTO) clutches for everything from tugboats and fishing vessels to luxury sailing yachts, connected to main and auxiliary engines and to gearbox PTOs.
Custom-designed factory or field retrofittable Logan front mount PTOs are suitable for multiple applications in offshore, industry and marine settings. The heavy-duty, self-contained, corrosion-resistant PTO clutches for auxiliary and direct-drive applications are designed to be mounted between the power take-off of the engine and auxiliary attachment such as a multi-station pump drive or
A pipe lay barge is a specialized vessel which may require up to eight (8) winches to operate simultaneously to properly lay pipe on the ocean floor. This particular barge company winches were equipped with conventional winches that used dog-type clutches used to manually engage and disengage the winch. This was a difficult and laborious procedure since it was nearly impossible to get each winch properly aligned before engagement.
With the Logan hydraulically operated, self-adjusting CH series clutch, engagement and disengagement of the clutch is done remotely with the press of a button, from the comfort of the wheel house control room - with the option of local push-button engagement as needed for testing. The barge operator now benefits from faster operating start-up operations and requires less man power to run the winch operation on his vessel.
The particular Pipe Lay Barge is equipped with 8 Mooring Winches and 2 Anchor Winches (130 ton Winches). Each Winch, including the anchor
Western Towboat Company Inc. is a family-owned business operating 19 tugs from its base in Seattle, Washington. The tugs regularly tow rail, container, general cargo and bulk aggregate barges to Alaskan ports. Western has also undertaken tows to the Hawaiian islands, Panama Canal, the US Gulf and east coasts, and South America.
The company prides itself on providing customers with one of the most modern tug fleets on the west coast. Each tug features a design that originated at Western Towboat and was built by Westerns own craftsmen.
Ed McEvoy, fleet port engineer, contacted Logan Clutch when he was informed that an azimuth thruster clutch assembly he had already installed in two other boats was no longer available for a new boat under construction.
I had worked successfully with Logan in the past on a winch clutch replacement project and so I decided to contact Logan for this project too, he explained.
Logan engineers went to work with the goal of designing an assembly that improved
Adding Logan Front of Engine Power Take-off (PTO) Clutches to the SSV Oliver Hazard Perry increases maneuverability, efficiency and safety.
Traditional Sails Equipped with Modern Day Power
The worlds newest tall ship, the SSV Oliver Hazard Perry, calls Newport, Rhode Island its home. The 200-foot vessel is the largest privately owned tall ship and largest civilian sail training vessel in the U.S. With her three-masted square rig towering 13 stories high, shes second in size only to the USCoast Guards Barque Eagle when compared with any other Tall Shipin America.
The tall ships namesake, American Commander Oliver Hazard Perry, won the battle of Lake Erie during the War of 1812 and popularized the phrases, We have met the enemy and they are ours and Dont give up the ship. The massive ship is certified for Ocean Service. The ship has a full-time crew of 17, accommodations for 32 and a day sail capacity of up 85 people. Team building is a key part of the curriculum where students become
Logan Clutch, Moose Boats and Cummins Pacific have teamed up to create the most capable fire boat package in the business.
Marine diesel engine specialist Cummins Pacific LLC and Logan Clutch have teamed up with Moose Boats Inc to deliver a new vessel, with outstanding fire pump capability, to West Pierce Fire and Rescue in University Place, Washington.
Moose Boats, a boat designer and manufacturer based in the San Francisco Bay Area, was awarded the contract to build a M2-37 catamaran fire rescue boat. The 37 ft. aluminium catamaran is powered by the newly-introduced twin Cummins 6.7 ltr. 425 hp turbo diesels and propelled by Hamilton 292 water jets. The vessel will provide West Pierce Fire and Rescue with fire-fighting, rescue, dive and shore-landing capabilities.
It features a unique fire pumping arrangement, with dual 4,546 litres/min fire pumps and a remote control fire monitor rated for 9,092 litres/min, as well as an electrically-operated bow door. The bow door arrangement maximizes
When Canadian towing and barge services provider Island Tug and Barge encountered problems with the mechanical clutch system on one of its tugs, it turned to Logan Clutch to provide a solution. Island Tug, based in Vancouver, British Columbia, offers towing and barge services, including ramp-equipped deck barges, aggregates and general cargo, as well as cable installations. The companys towing services extend to the Pacific Rim, and it also has facilities on Canadas eastern seaboard.
Island Tug had been running two generator sets on the tug Island Scout. These ran pumps for the main hydraulics and bow thrusters off the back of the engines. In order to do this, both engines were equipped with conventional, mechanical lever actuated PTO clutches to drive the pumps. The problem was that these clutches started to fail during full rev/min engagement. Generator sets normally run at 1,800 rev/min and cannot be slowed down to allow for clutch engagement. These failures were creating frequent
Logan CH 1050 series clutches proved to be just what was needed when New York-based Reinauer added fast and maneuverable articulated tug and barge units to its fleet.
Reinauer Transportation Companies, based in Staten Island, New York, is a leader in the US maritime petroleum and chemical transportation business. Established in 1923 by Bert Reinauer, the company successfully weathered the Depression and the war years, and has continued that trend through the past several decades.
In the 1990s, Reinauer demonstrated that it could adapt to the stringent regulatory changes imposed by the Oil Pollution Act of 1990, completely revamping its fleet by moving forward with innovative double-hulled vessel designs. These innovations manifested themselves in the form of articulated tug and barge (ATB) units, of which there are now a total of 17 in the Reinauer fleet.
The most recent series of ATBs added to the Reinauer fleet were delivered by Senesco Marine, of North Kingstown, Rhode Island. There
Founded in 1889, Seattle-based Foss Mari-time offers a complete range of maritime ser-vices and project management to customers across the Pacific Rim, Europe, South Ameri-ca and around the globe. With one of the largest fleets of tugs and barges on the Ameri-can West Coast, Foss operates two shipyards and offers worldwide marine transportation, emphasizing safety, environmental responsi-bility and high-quality service.
Logan Clutch is proud to have been involved with the conversion of the Dolphin Class tug Campbell Foss into the Worlds second Hybrid Tug. The Campbell Foss was built in 2005 in Rain-er WA in the Foss Yard and was originally a conventional tug powered with two 2540hp Caterpillar 3512C engines coupled to Rolls-Royce US205 fixed pitch azimuth thrusters.
The conversion involved adding a new Logan LCT Bell Housing clutch on to the 21 flywheel output of the 3512s with an integrated Centa torsional coupling. The flange output of the clutch was connected by a shaft to the motor