Case Studies

Author: Andrew Logan

Logan Direct Drive PTO Clutches Enhance Bow Thruster

By Andrew Logan
April 13, 2018 Category: Direct PTO, Marine

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

Logan Bell Housing PTOs Now Available for Jet Stream Waterblasters

By Andrew Logan
April 13, 2018 Category: Bell Housing, Water Blasting, Hydro Excavation / Vacuum / Water Jetting Equipment

Logan self-adjusting, hydraulically actuated Bell Housing Power Take-Off (PTO) clutches have been standard equipment on OEM marine and mobile equipment for over 18 years. Thousands of Logan units are in the field, operating on airport snow blowers, highway and airport marking and runway rubber removal equipment, and more recently trailor mounted waterblasting equipment. Logan vs. Mechanical PTOs The advantage of the Logan Clutch is its ability to engage and disengage the water jetter hydraulically, through push-button activation, eliminating the use of a mechanical hand lever or yoke type clutch engagement system, which dates back to the early 40s. Smooth, Logan softstart engagement eliminates clutch downtime due to over and under adjustment. And since the Logan clutch is self-adjusting, clutch engagement is smooth and consistent after hundreds of hours of use. The mechanical clutch requires the operator to hand engage a clutch, which opens up the opportunity for untrained operators

Jet Boat Fishing in Bristol Bay Alaska

By Andrew Logan
January 16, 2018 Category: General, Marine

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

Hybrid Truck Uses Logan Clutch Technology

By Andrew Logan
January 16, 2018 Category: General, Mobile

Logan was the partner with LightningHybrids of Loveland CO on a recently brought to market round-town delivery truck. The system is particularly well suited to heavy stop start duty trucks saving up to 40% of the fuel. LightningHybrids had the unique idea of a hydraulic hybrid. Energy is stored in a hydraulic accumulator and used during acceleration. LightningHybrids demanded a long and reliable duty cycle with performance that didnt change over time. Additionally they need a part that would offer all the value at a price that could be sold to a price sensitive fleet owner for retrofit into existing equipment. In the prototype stage LightningHybrids found that the Logan Units could work as required. Ever demanding they, investigated competitors but in the end returned to the Logan product because of Engineering support, manufacturing capacity and proven performance at a value price point. The Logan S35 was heavily modified to fit into the existing envelope. Logan Engineers worked

Logan LVC Series Clutches for Well Service Rigs / Oil and Gas

By Andrew Logan
December 21, 2016 Category: Oil Gas

Maximum Torque Minimum Envelope Reverse Compatibility Air actuated, multiple disc, dry disc pack design for maximum torque transmission within short, axial envelope. Simplified cylinder-piston, o-ring design, eliminates air tube or bladder type leaks. Lightweight Design Ideal for overall rig weight reduction requirements The Logan LVC design can reduce overall rig weight by several hundred pounds, which goes a long way when complying with state and federal on-highway load regulations during rig transport from job to job. For Draw Works Applications p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Helvetica; min-height: 11.0px} p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Helvetica} The Logan LVC clutch cylinder-piston, and disc pack design provides more clamping force and torque transfer than competitor clutches all within a design envelope that is reverse

Logan Bell Housing PTOs For Runway Cleaning / Airport and Roadway Marking Removal Equipment

By Andrew Logan
October 18, 2016 Category: General, Mobile

Water blasting trucks quickly and completely remove all types of durable traffic markings from asphalt and concrete applications on roadways, airports, parking lots, with up to 40,000 psi. (2700 bar) of water pressure. The simultaneous jetting and vacuuming of the remnant material, minimizes damage to surfaces and eliminates secondary clean-up. Logan flywheel mounted, hydraulically actuated, Bell Housing PTO clutches are an ideal option, and available in No. 00 No. 5 size flywheel; fitting engines with HP ranges from 50 1000 HP. Self-adjusting, smooth engagement and disengagement, as well as remote activation, make the Bell Housing PTO ideal for diesel and spark ignited engines for mobile applications.

Logan Power Take-off (PTO) Clutches For Mobile Equipment

By Andrew Logan
October 12, 2016 Category: General, Mobile

OEM Manufacturer of Construction Equipment Works Together with Logan Application Team The Challenge: Before OEM contacts Logan to solve system issues which are causing hydraulic pump failure Most OEM manufacturers of mobile equipment use hydraulic piston pumps to control machine movements and attachments. In many cases these hydraulic piston pumps are driven remotely from the engines auxiliary PTO drive via a slip yoke shaft. Machine Operators must be able to turn these pumps on and off when the vehicle is driven from job site to job site - in order to prevent over speeding the pump when the engine is running faster than the pumps normal hydraulic work speed. There is also the potential for all the pumps to engage at once, which would cause the input torque rating to be above the engine specifications causing hydraulic system and pump failure. In this situation, customers were going beyond the limits of the machine and pump specs the OEM had to do something quickly -they contacted

Logan Power Take-off Clutches for Industrial and Marine Gearboxes

By Andrew Logan
October 11, 2016 Category: Power Take Off Clutches For Industrial And Marine Gearboxes, Marine

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.

Logan PTO Clutches for Cat C32 Diesel Engines

By Andrew Logan
October 05, 2016 Category: General, Marine

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


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