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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


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.


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.


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


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


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


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


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


Tech File: Vesconite Rudder Bushings

Photo: Vesconite

South American river tugboats need robust rudder bushings: some 20 tug boats on the Parana River, running through Brazil, Paraguay and Argentina, have been equipped with Vesconite rudder bushings.   In the challenging waters of South American rivers


Delay Averted with Underwater Sterntube Renewal

Photo: Hydrex

Hydrex Underwater Technology has assisted an excavation vessel hemorrhaging oil from a stern tube seal entangled with steel wire to pass safely through the Panama Canal. The 156m long, Dutch-owned vessel was unable to make the canal transit until the propeller shaft seal had been repaired


Tug Huron Goes to Work in Duluth

Photo: Kenneth Newhams / Great Lakes Towing Company

The Great Lakes Towing Company said it has repositioned its Tug Huron to Duluth, Minn. on Monday, January 2, 2017 to enhance capabilities for icebreaking, harbor assist and other services essential to commercial shipping in the Duluth-Superior region.  


Two Turkish-built Tugs Delivered in Canada

Two newly built custom tugboats have been delivered to Canadian based SNC Lavalin to operate during the construction of Montreal's New Champlain Bridge on the Saint Lawrence River.   The new vessels, one 13 meters long and the other 15 meters long


Polar Cruise Ships to Feature Rolls-Royce Green Tech

Image: Rolls-Royce

Norwegian explorer cruise line Hurtigruten is to build two new expedition ships using a new and environmentally sustainable hybrid technology from Rolls-Royce making fully electric propulsion on a passenger ship possible.   The Rolls-Royce designed MS Roald Amundsen and MS Fridtjof Nansen


Jotun:ISO 19030 standard can make $30 bln impact on the industry

Geir Axel Oftedahl, Jotuns Business Development Director - HPS Photo Jotun

The International Organization for Standardization (ISO) has now published the long-awaited ISO 19030, a new standard conceived to measure changes in ship-specific hull and propeller performance. According to Jotun, which has led the industry in the standard’s development


ROBA-DS Shaft Couplings Certified by DNV GL for Offshore

Image source shutterstockam70

The compact and high performance ROBA-DS disk pack couplings by mayr power transmission have been certified by DNV GL. They ensure maximum possible operational and functional safety for users on the high seas. Whether in the drives of ship propellers


Wärtsilä EnergoProFin for CPP, FPP

Wärtsilä EnergoProFin energy saving solution increases propeller efficiency and creates fuel savings of up to five percent. Photo Wartsila

Wärtsilä EnergoProFin is a state-of-the-art energy saving solution that increases propeller efficiency and creates fuel savings of up to five percent. The solution is now available for both controllable pitch propellers (CPP) as well as fixed pitch propellers (FPP)


ZAMAKONA Completes "J UAN THING" Refit

Juan de la cosa Photo SHIPYARD ZAMAKONA PASAIA

Shipyard Zamakona Pasaia completed last week the repair and maintenance of health dry rescue ship and maritime assistance "JUAN THING" the Social Marine Institute.   The ship 75 meters long by 14 meters wide, has required the implementation of various repairs and general


Korara: New Ferry Delivered to Fullers Group

Photo: Incat Crowther

Korora, the first of a two vessel repeat order following the operational success of Te Kotuku, delivered in 2014, was recently delivered.   Korora is a 34m catamaran, a collaboration between operator Fullers Group Ltd., designer Incat Crowther and builder Q-West


Rolls-Royce to Propel New Danish Ferry

Photo: Mols-Linien

Danish ferry operator Mols-Linien has ordered a new passenger ferry from the Rauma Marine Constructions yard in Rauma, Finland. Rolls-Royce will provide the main propellers and propulsion control system to the new ship, which is planned to operate between mainland Denmark and the island of Bornholm


World’s First Full Scale Numerical Modelling Workshop

Ship scale CFD simulation made with StarCCM+ code (Photo: Lloyds Register)

Lloyd’s Register (LR) hosted the world’s first workshop on full scale hydrodynamic computer simulations at their Global Technology Center in Southampton last month. Ship designers from around the world came together with the aim of building confidence in the accuracy of ship scale


Great Ships of 2016: Sunray

(Photo: SungDong)

Since it started publishing in 1939, Maritime Reporter & Engineering News has recognized excellence in ship construction. This year 18 ships in total were honored, including many “world firsts.”   Sunray - First of Two Dual Class Tankers for TEN


Great Ships of 2016: Milos

(Photo: SungDong)

Since it started publishing in 1939, Maritime Reporter & Engineering News has recognized excellence in ship construction. This year 18 ships in total were honored, including many “world firsts.” Milos - Suezmaz crude oil tanker  


New Workboat for Oil Spill Response

(Photo: SWB)

An all new workboat, produced by the Portuguese company SWB, Seismic Workboats, Lda headquartered in Peniche, has been designed and developed by engineering teams from Portugal, England, the U.S. and Norway and built at Peniche Shipyard.  






 
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