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Propeller

MAN Diesel Expands CP Propeller Portfolio

Photo courtesy MAN Diesel

In response to the market demand for very large CP propellers up to and beyond 30,000 kW and with diameters over eight meters, MAN Diesel is expanding its propeller portfolio to add two new, propeller hub-sizes – VBS2080 and VBS2240 (2080 mm and 2240 mm hub diameters respectively). These propeller sizes are typically destined for ConRo vessels, shuttle tankers and special vessels with high ice classes, and powered by MAN B&W two-stroke MC-C or ME-C main engines that directly drive a CP propeller. As the potential for improving propeller propulsive efficiency aft-ship optimization is far greater than that for improving diesel-engine fuel-oil economy, MAN Diesel has devoted more resources to its CP propeller program and associated aft-ship systems in recent years, with the aim of improving total propulsive efficiency by 8-10% within the next three to five years. Backed up by industry demand, MAN Diesel focuses on low environmental impact and optimal fuel-oil consumption. While these two factors can play against each other in diesel-engine design, they go hand-in-hand with propellers since an increase in propeller efficiency results in lower propulsion power and fewer emissions. Where the correct approach to the vessel-design process is taken and MAN Diesel are involved at an early stage in propeller and aft-ship optimization


Wärtsilä Opens Propeller Factory in China

Propeller in the new factory Wärtsilä's joint venture company in China, Wartsila CME Zhenjiang Propeller Co Ltd., inaugurated its new propeller factory at Zhenjiang in Jiangsu province. The new factory is expected to double Wärtsilä's capacity to manufacture this type of propellers. During the past ten years the output has increased by 500 percent. In 2007 up to May, there are 425 vessels contracted in China, which is 45 percent of the global vessel order intake


Wärtsilä Acquires Propeller Repair Business in the U.K.

Wärtsilä has acquired the UK-based propeller repair company McCall Propellers Ltd. The company's net sales are $12.7m with 33 employees. McCall Propellers is the largest marine propulsion support services company based in the U.K. specializing in emergency repair of propeller equipment. The acquired company has purpose-built repair facilities next to Glasgow Airport, and work is carried out either in the workshop or on site anywhere in the world.


Mercury Marine Acquires Teignbridge Propellers

Mercury Marine announced today that it has acquired Teignbridge Propellers Ltd., headquartered in Newton Abbot, United Kingdom. Teignbridge Propellers produces bronze and Nibral (nickel, bronze, aluminum) propellers for yachts, patrol boats and commercial vessels. In addition to its line of standard and custom propellers, Teignbridge also produces a complete underwater package of stern gear for inboard-powered vessels, which includes rudders, shafts, struts, seals, logs and bearings.


Container Ship Propellor Damage Fixed by FN Diving

Photo credit FN Diving

Heavy shaft vibrations led  a container shlp owner to call in FN Diving in Rotterdam for underwater repair of the propellor. The inspection of the propeller revealed a deformation on one of the blade tips due to impact damage, the blade was found bent up to a 70 degree angle towards pressure side, while the tip of the next blade was broken off. In cooperation with the Propeller manufacturer, FN Diving determined an in situ repair plan.


New Fixed Pitch Propeller Design from Wärtsilä

Wärtsilä introduced the FPP Opti Design, a new fixed pitch propeller (FPP) design concept. According to Wärtsilä, the new design offers fuel savings of up to 4 percent and highly reliable full scale performance predictions. The concept has been developed utilizing the latest computational fluid dynamics (CFD) technology. The Wärtsilä FPP Opti Design has been developed at the company’s Technology and Service Centre in the Netherlands


Schottel Celebrates CPP Milestone

Schottel SCP controllable-pitch propeller systems of the 5-X series are available with  power ratings from 1,000-20,000 kW.

German propulsion giant Schottel looks back at five decades of  controllable-pitch propeller (CPP) development. CPPs have been developed and produced on the Baltic coast of Germany since 1962 – initially in Rostock, and then in Wismar from 1964. The first units were manufactured for 86 freezer-trawlers of type Tropik for the Soviet Union. Four additional types were produced for GDR fishery vessels. The first years of controllable-pitch propeller production in Wismar centered on


Propeller Retrofits Saves 10 Percent Fuel

Benefits of fitting CLT propellers include fuel savings of around 10 percent while maintaining the same speed, according to Geneva-based shipowner Cargill International SA, which has recently released consumption figures for two of its Panamax bulk carriers. The 70,000 dwt Powhatan and Paiute had CLT propellers retrofitted in February and March 1998, after Cargill had already benefited from more than two years' first-hand experience of the CLT propeller concept developed by Madrid-based


UMC and MPR Join Forces

Worldwide underwater ship maintenance specialists UMC International and Dutch based marine propeller repair specialists Maritime Propeller Repairs (MPR) have signed an agreement to cooperate for workshop and in-water propeller repairs.   The agreement was signed in Asperen, The Netherlands on 23rd September 2011, at an open day hosted by MPR.  More than 300 visitors attended the event, and all were very enthusiastic about the new joint service


Cleaning a Propeller

Luis.jpg

From the desktop of Luis Velarde, courtesy Rice Propulsion A propeller is exposed to all sorts of attacks underwater, such as rusting and adhesions of the sea. It is the key piece of the ship’s propulsion system, and thus deserves special attention.  The propeller is the element that allows the transformation of the mechanical energy of the engine into propulsion. A propeller in poor state is a disaster


Nakashima Propeller, ClassNK Hold Joint Seminar

Nakashima Propeller and ClassNK held a joint technical seminar in Hamburg on March 19.   Nakashima Propeller and ClassNK, from their respective roles in the industry, provide products and services to support ships through their lifecycle


DNV GL Launches Hull, Propeller Analytics

DNV GL is will launch a hull and propeller performance analytics module as part of the new fleet performance management service ECO Insight. The module is based on computational fluid dynamics (CFD) methods to correct for changing operational conditions and produces much more accurate results than


Shipbuilding for the Arctic

(The following excerpt by Authors: S Navaneetha Krishnan & Antony Prince) The Arctic region has a huge potential in terms of unexploited natural wealth and resources, though it accounts for a small area on the earth’s surface. Many countries


Wärtsilä Dual-fuel Engines for Baltic Sea Ferry

Tallink Shuttle

  A new fast ropax ferry ordered by the Estonia based Tallink Grupp for its Tallinn - Helsinki route, will feature Wärtsilä dual-fuel engines running primarily on liquefied natural gas (LNG). The ship is to be built at the Meyer Turku shipyard in Finland and is scheduled to be in


Thordon Bearings COMPAC System for Britannia

P&O Cruises Britannia features a water-lubricated COMPAC propeller shaft system (Photo: Thordon Bearings)

Thordon Bearings seawater-lubricated COMPAC propeller shaft system given royal ‘seal’ of approval    P&O Cruise’s new flagship Britannia was officially christened by the Queen yesterday at a naming ceremony in Southampton, U.K.  


SCR Systems Chosen for Newbuild Trawlers

Graphic representations of the Nautic wetfish trawler design for HB Grandi. Each vessel will be powered by an MAN six-cylinder L27/38 unit, accompanied by a four-bladed, 3.8-metre, ducted MAN Alpha VBS 860 propeller (Image courtesy of HB Grandi/Nautic)

Three wetfish trawlers being built for Icelandic fishing company HB Grandi will feature MAN SCR Selective Catalytic Reduction (SCR) system in addition to MAN main engines. MAN Diesel & Turbo states that the system will enable the trawlers’ IMO Tier II-compliant engines to fulfill the IMO


Viking Neptun Delivered for Technip

Photo: Fuglefjellet AS

Viking Neptun was delivered from Kleven Verft to Eidesvik on February 17, and the naming ceremony was held in Stavanger on February 28. The vessel’s Godmother, Patricia Pilenko, broke the champagne bottle on Viking Neptun, which will now start operating on charter for Technip in the North


Unidelta: Twin ASD Tugs From Argentina

Brutus - DT Amura estribor

Best known for modern, innovative passenger catamarans, Astilleros Unidelta SA of Buenos Aires is currently building an innovative tug. The aziumthing stern-drive (ASD) ship-handling tug is now being built at the Argentinian yard. The first, in an anticipated series


Propellers: One Size and Shape Does Not Fit All

A screenshot of the latest version of PropCad

Hydrocomp’s newest release of PropCad incorporates 3 years of enhancements. Propellers are surprisingly complex devices, especially considering most are a solid piece of metal with no moving parts. The variation in vessels and operational requirements leads to wildly different designs


Eastern Debuts ‘Thunderbolt’ Towboat

THUNDERBOLT combines Twin Electric V-Pod Propulsion and Diesel-Electric Technology offering it to the US Inland Waterway’s Market

Eastern Shipbuilding Group, Inc. introduced its new 120-foot, 4,200-horsepower Inland Towboat design, THUNDERBOLT, combining twin electric V-Pod propulsion and diesel-electric technology for what the builder calls its “vision of the future for the U.S. inland waterways.”  


Volvo Penta Unveils Forward Drive Innovation

New Marine Propulstion Technology_Volvo Penta Forward Drive (Rear 3Q)_FINAL

A revolutionary new concept in marine propulsion, the first Volvo Penta Forward Drive (FWD), debuted today at an exclusive event at the Miami International Boat Show.   Opening up a new realm for recreational water sports, the Volvo Penta FWD begins with forward-facing dual counter-rotating


Van der Velden Marine Systems: Innovating Efficiency

Photo: Damen

After celebrating its 50th anniversary in 2013, Van der Velden Marine Systems, a daughter company of the Damen Group, is not resting on its laurels as the Netherlands-based company’s R&D department works to continue advancing maritime maneuvering and propulsion efficiency.  


Silentdynamics Enters Rim Thruster Market

Image: Silentdynamics

Rim-driven thruster technology has emerged in recent years, demonstrating its potential for compact and silent maneuvering propulsion.   Early development for this technology performed in Rostock, Germany at the company AIR. The project was then taken over by Voith


Maritime Propeller Repairs Certified for In-Situ Welding

Photo courtesy of MPR

Maritime Propeller Repairs BV (MPR) obtained a DNV-GL certification to perform propeller repairs using in-situ welding, the company announced today. Netherlands-based MPR is now the only company certified for vertical welding on propellers. Most repairs on propeller blades require the removal of


Volvo Penta IPS: Still Revolutionary

A decade ago, one system single-handedly changed the face of leisure and commercial boating. The game changer Volvo Penta IPS.

  In the first two months of 2005, visitors from all over the world attended the London International Boat Show and Miami International Boat Show, expecting to find the usual selection of boats, equipment and accessories. What they discovered instead was history in the making






 
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