Seatorque Boosts Brazilian Superyacht Performance

MarineLink.com
Thursday, October 17, 2013
Designed for transoceanic voyages, The MCP Hemisphere 140 Raffaella II is the largest yacht built in Brazil to date and the largest aluminum yacht ever constructed in South America.

Brazilian superyacht builder MCP Yachts has credited Seatorque Control Systems for contributing to the outstanding performance of its latest launch – the Hemisphere 140 Raffaella II. Incorporating Seatorque’s unique enclosed drive shaft system, the 43-meter aluminum vessel, powered by twin Caterpillar C32 1825 HP engines, achieved a top cruising speed of 22 knots during sea trials with an 85 percent load and 167 metric tons displacement, reported MCP president Manoel Chaves. The vessel features a pair M3-400 single-piece Seatorque shaft systems, each 22 feet in length, accommodating the vessel’s four-inch diameter shafts.

“The vessel’s light weight, propeller design and shaft system all add together to make a huge difference,” said Chavez. “In all my years on the water, I have never witnessed a vessel this size with a comparable power package to cruise at this speed. Thanks to Seatorque’s enclosed shaft system, the vessel achieved maximum horsepower, experienced zero shaft noise and vibration, and produced very little wake.

Launched in July, Raffaella II is the largest yacht built in Brazil to date and the largest aluminum yacht ever constructed in South America. The vessel was designed by MCP in collaboration with Vripack and built at the MCP shipyard in Guarujá . It is the third vessel built by MCP Yachts to include the Seatorque Enclosed Shaft System.

According to Seatorque executive vice president Jana Stolper, the Seatorque Enclosed Shaft System is growing in popularity among superyacht builders, as evidenced by the 2012 installation on the highly-acclaimed McConaghy Yachts Adastra, designed by John Shuttleworth. This futuristic 140-foot trimaran, powered by a single Caterpillar 1,000 HP C18 engine, features an Seatorque ST-300, 32-foot, one-piece enclosed shaft system.

The Seatorque Enclosed Shaft System is a self-contained, oil filled, shaft and thrust bearing assembly designed for yachts of all sizes. The system is supplied as a single unit from the propeller end to the engine input coupling accommodating any length shaft and diameters up to seven inches. Operating as a self-contained unit, the Seatorque system allows propeller thrust to be fielded by internal bearings and delivered through the shaft’s mounting system supported by the structure of the vessel, rather than the vessel’s engines and isolators. This reduces vibration and noise and increase the life expectancy of the engines and transmission mounts. The Seatorque system connects the shaft to the engine using flexible universal joint assemblies. This eliminates leaking stuffing boxes, seals, cutlass bearings and associated shaft wear. The use of universal joint assemblies also eliminates damaging engine-to-shaft misalignment and reduces installation and alignment time by more than half. The elimination of cutlass bearings and stuffing boxes results in an average eight percent increase in horsepower, allowing for greater fuel economy and range. In addition, water flow is undisturbed by the non-rotating casing of the shaft assembly, allowing clean water flow to the propeller. This translates into an increase of thrust arc around the propeller, contributing to the efficiency of horsepower delivery.

“The Seatorque system replaces the traditional multiple-component shaft system with a single piece of equipment that is simple to install and improves the performance and efficiency of any vessel, while greatly reducing shaft noise and vibration,” said Stolper. “These are very important benefits for yacht owners, especially those accustomed to long-range travel.”

seatorque.com
 

  •  Powered by twin Caterpillar C32 1825 HP engines, Raffaella II achieved a top cruising speed of 22 knots during sea trials producing a minimal wake.

    Powered by twin Caterpillar C32 1825 HP engines, Raffaella II achieved a top cruising speed of 22 knots during sea trials producing a minimal wake.

  • The Seatorque Enclosed Shaft System is a self-contained, oil-filled shaft and thrust bearing assembly designed to increase horsepower, fuel economy and engine life while minimizing shaft noise and vibration. The system is supplied as a single unit from the propeller end to the engine input coupling accommodating any length shaft and diameters up to seven inches.

    The Seatorque Enclosed Shaft System is a self-contained, oil-filled shaft and thrust bearing assembly designed to increase horsepower, fuel economy and engine life while minimizing shaft noise and vibration. The system is supplied as a single unit from the propeller end to the engine input coupling accommodating any length shaft and diameters up to seven inches.

Maritime Reporter July 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Propulsion

Thordon Bearings Secures AK Ferry Contract

Thordon Bearings has received an order to supply its COMPAC system to two Alaska Ferry newbuilds under construction at the Vigor Industrial shipyard in Ketchikan, Alaska.

Google Maps Goes Coastal with Unmanned Boat

A new high-tech unmanned vessel, launched with the help of Google, will use innovative technologies from the boatbuilding and mapping fields to map shorelines and

MOL Wins Eco Awards in California

Mitsui O.S.K. Lines, Ltd. earned recognition from the ports of both Los Angeles and Long Beach, California, today, for its efforts to ensure compliance with

News

On USCG Anniversary, Gov. McAuliffe Urges Hurricane Preparedness

Gov. Terry McAuliffe encouraged Virginians to get ready for hurricane season and provided an update on the commonwealth’s preparations Friday at a press conference

Diana Shipping Nets 2Q Loss

Diana Shipping Inc. today reported a net loss of $14.1 million and net loss attributed to common stockholders of $15.5 million for the second quarter of 2015, compared to net loss of $5.

Optimized Tug-Barge System Designs by Robert Allan

Optimized Tug-Barge System Designs by Robert Allan Ltd. by David R. Connand Robert G. Allan, P.Eng. Some veteran Mississippi pushboats and barges have been

Yachts

Maritime Museum Christens San Salvador Replica

The Spanish ship San Salvador is the embodiment of California’s origin story. The ship’s voyage in 1542, with Juan Rodríguez Cabrillo at the helm, established California

Super Yachts Give Boost to NZ Economy

New Zealand Customs Minister Nicky Wagner says mid-winter marks the end of another successful yacht season, with many of the remaining international yachts departing at the end of last month.

Four Rescued from Boat Fire in California

U.S. Coast Guard and firefighter crews helped rescue four people from a boat fire Tuesday afternoon in Alameda, Calif.   Coast Guard Sector San Francisco Command

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Standards Navigation Pipelines Salvage Ship Repair Ship Simulators Sonar Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2344 sec (4 req/sec)