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Power Motoryacht

Power Motoryacht

Power Motoryacht

Product catalog summary
Introduction
This document discusses the innovative Twin Disc Express Joystick System™ (EJS), which aims to revolutionize docking and slow-speed maneuvering for diesel-powered, conventional driveline boats. The system leverages Twin Disc's QuickShift® transmission and EC300 Power Commander® control technology to offer superior control and agility.

Background
The introduction of pod propulsion systems by Volvo Penta and Cummins-MerCruiser in the mid-2000s posed a challenge to traditional inboard-drive systems. Twin Disc recognized the need for an alternative that could compete with the joystick control systems of these pod drives.

Technical Specifications
The QuickShift® transmission is central to Twin Disc's system, featuring a patented clutch design that allows for faster and smoother gear engagement. The system uses hydraulic oil to actuate pistons, enabling quick and seamless transitions between different speeds and directions. This design minimizes mechanical shock and allows for precise control at low propeller speeds.

System Features
The EJS system enhances maneuverability with its ability to apply torque instantaneously in either direction, making it more agile than pod systems. It can be retrofitted to most inboard boats without requiring hull modifications and is compatible with dynamic-positioning capabilities.

Performance Evaluation
During testing, the system demonstrated exceptional smoothness and responsiveness, allowing for precise control using only the joystick. The system maintained constant engine RPMs, even during complex maneuvers, and showed no noticeable delay or hesitancy.

Market Implications
While the cost and official launch details of the EJS system remain undisclosed, it is expected to be a cost-effective alternative to existing pod-drive systems due to its mechanical simplicity. The system does not claim increased operational efficiencies or space savings but excels in dockside maneuvering.

Conclusion
The Twin Disc EJS offers a compelling alternative to pod-type propulsion systems, potentially challenging the market dominance of Volvo Penta and Cummins-MerCruiser. Its ease of use and superior maneuverability make it an attractive option for boat owners.

Contact Information
For more information, contact Twin Disc at (262) 638-4000 or visit www.twindisc.com.
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Catalog excerpts

Power Motoryacht-1

ELECTRONICALLY REPRINTED FROM JANUARY 2010 GAME CHANGER? STORY BY CAPT. BILL PIKE PHOTOGRAHY BY MARTY MASON ::: Twin Disc challenges pod drives with a smooth, quick joystick system for shaft-drive boats. ost likely, it was the eyebrow that got me. I was winding up a pleasant dinner with a boatbuilding friend at the recent Fort Lauderdale International Boat Show and gabbing about one of my favorite topics— the super-sophistication of oil-field vessels—when he turned to me, dabbed his mustache with a linen napkin, and raised an eyebrow while pulling a business card from his shirt pocket. Lots of people pull cards at boat shows, but few raise their eyebrows so intriguingly.

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Power Motoryacht-2

“The thing I am turning you on to here, Bill, is confidential,” he said while writing something on the back of the card, “but if you call this number and mention my name, I think they’ll let you see the system.” The next afternoon, hot on the heels of several phone conversations, the corporate folks at Twin Disc had finally agreed to let PMY do a story about something that was still very hush-hush, which is why I was standing at a designated spot well beyond the hubbub of the show, waiting for a ride to an undisclosed location. At length, a Lincoln Navigator pulled up, a side door opened, and...

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Power Motoryacht-3

systems today. Indeed, some two decades ago, when I was working on such vessels, joystick-DP systems were already common and spreading rapidly throughout the industry. The next step entailed the purchase of a test bed, a mainstream, off-the-shelf 47foot inboard-drive sportfisherman. It was equipped with Twin Disc’s QuickShift transmissions, unique marine gears that are not part of the pod systems on recreational vessels but are currently part of many commercial systems. The QuickShift is a robust, patented, and proven piece of machinery (see “How It Works,” this story) that offers several maneuverability-enhancing...

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You need to feel the speed, fluidity, and versatility of the system firsthand to thoroughly appreciate it.

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Power Motoryacht-5

47-footer looked like any other wellmaintained mid-range convertible. Her flying bridge steering station, though, announced a difference. Alongside the 316L stainless steel EC300 Twin Disc Power Commander electronic engine controls to the right of the wheel was a solid stainless steel joystick with a large knob atop it. After cranking up the engines, Twin Disc’s skipper, Capt. Marty Mason, settled into the co-pilot’s seat and said simply, “She’s all yours, Bill.” During the ensuing two hours, I docked the sportfisherman stern-first in several different slips, negotiated a couple of tight fairways...

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Power Motoryacht-6

THE TWIN DISC EJS™ T WIN EJ S IT’ S SIMPLE. IT’S SI MPL E . DON’T BUY YOUR NEXT BOAT WITHOUT IT. YO UR N E XT BO AT W I THO UT I T. The Twin The Twin Disc Express Joystick System™ (EJS) absolutely revolutionizes docking and slow speed Express Joystick System absolutely revolutionizes slow maneuvering of diesel powered, conventional driveline boats. diesel powered, conventional boats. With easy fingertip movements you control direction With easy fingertip movements you control direction and speed —instantaneously. No lagging. No lugging. instantaneously. No lagging. No lugging. ously ® No lurching....

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.