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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


Editorial: BWTS. Like it or Not, Here it Comes

Gregory R. Trauthwein  Associate Publisher & Editor

With age comes perspective, and in my 20 plus years reporting on this industry I have seen my fair share of regulation that has served to ‘raise the hackles’ of ship owners. It is quite simple really; new regulation often means new procedure, new design, new equipment and new costs


The Art of Propeller Making

The mold is 1,100 degree Celsius liquid bronze is flowing into the prepared propeller mould.to be filled.

The world’s biggest propellers have their cradle in the North of Germany. MMG – Mecklenburger Metallguss GmbH – has manufactured for more than 65 years propellers for ships, including the biggest and fastest, in the State of Mecklenburg-Vorpommern


Maintenance Woes Led to Digby Ferry Grounding

Maintenance deficiencies and inadequate emergency procedures led to November 2013 grounding of Princess of Acadia in Digby, Nova Scotia    Maintenance deficiencies and lack of adequate emergency procedures led to the November 7, 2013 loss of electrical power and grounding of the


'World's First Hybrid Superyacht'

Savannah. Image by Feadship

Developed by Dutch shipbuilders Feadship, the 83.5m Savannah is touted as the world's first hybrid super yacht. Vessel is 30% more fuel efficient than similar sized counterparts, claims the company.   The eco-friendly super yacht uses a blend of a single diesel engine, three gensets


DSME Returns for More Dual-Fuel Engines

5G70ME-GI (Eric Haun).jpg

MAN Diesel & Turbo received an order for four MAN B&W 5G70ME-GI engines in connection with Daewoo Shipbuilding & Marine Engineering Co.,Ltd. (DSME) agreeing a deal with the BW Group to build two LNG carriers. The technical engine specification complies with IMO Tier II


‘Seawater is the Ultimate EAL’

Cost comparison of stern tube lubricants (Image courtesy of Thordon Bearings)

Thordon Bearings: “Seawater is the only commercially viable EAL for propeller shafts”   Thordon Bearings Inc., a manufacturer of seawater lubricated bearings for the global marine industry, has questioned the rise of environmentally acceptable lubricants (EALs) in oil-based


Tsuneishi Builds 200th Kamsarmax Bulk Carrier

Ultra Lion (Photo: Tsuneishi Shipbuilding)

Tsuneishi Shipbuilding Co., Ltd. finished building an 82,000-mt D/W type bulk carrier Ultra Lion on January 7, 2015, marking the completion of the builder’s 200th Kamsarmax model vessel.   Built by Tsuneishi Group Shipbuilding, Inc


Great Ships of 2014: Al Kout Environmental, Piracy Protected, Proven

H.5392 web.jpg

The KOTC operated crude oil tanker Al Kout is the fourth sister Very Large Crude Carrier (VLCC) of 317,300 DWT, part of the KOTC Phase III of the fleet newbuilding projects. The vessel has been designed and built under the survey of NK class and distinguished in the register by the following


Great Ships of 2014: The Hybrid-Powered Semper Fi

Semper Fi

The MV Semper Fi  from the Netherlands is an innovative European inland waterway vessel measures 361 x 37.7 x 12.1 ft. (110 x 11.5 x 3.7 m). In cooperation with MARIN, the Netherlands Maritime Research Institute in Wageningen, the Dutch shipping company Carpe Diem Shipping developed the


Rolls-Royce wins AK Ferry Propulsion Contract

Rolls-Royce has been selected by the Alaska Department of Transportation and Public Facilities, via its Alaska Marine Highway System, and Vigor Industrial, to provide a highly efficient propulsion system for its future Alaska Class ferries that will be built by Vigor Shipyards in Ketchikan, Alaska


Rolls-Royce Propulsion for New Alaskan Ferries

Image courtesy of Rolls-Royce

The new Alaska Marine Highway System ferries, to be built by Vigor Industrial, will feature Rolls-Royce propulsion systems.   Rolls-Royce has been selected by the Alaska Department of Transportation and Public Facilities, via its Alaska Marine Highway System, and Vigor Industrial


Great Ships of 2014: R/V Neil Armstrong - Multifaceted Sea Explorer

 Two ships, $145m GPA designed Diesel Electric propulsion

The Ocean Class Auxiliary General Oceanographic Research (AGOR) vessel hull number 27 started its official life as the R/V Neil Armstrong, the first research vessel named after a space explorer.  The ship was designed by Guido Perla and Associates and built at Dakota Creek Industries (DCI)


Great ships of 2014: Siem Moxie

11408.1_SIEM MOXIE web.jpg

The ISV Siem Moxie, an Ulstein SX 163 design not only has been deemed a “Great Ship” in our pages, it has also been awarded the “Offshore Renewables Awards 2014” and the “Innovation Awards” by an international panel.  The Siem Moxie measures 242 x 55.7 ft


Rolls-Royce Propulsion for Alaska Class Ferries

Alaska Class Ferry concept

  Rolls-Royce has been selected by the Alaska Department of Transportation and Public Facilities, via its Alaska Marine Highway System, and Vigor Industrial, to provide a highly efficient propulsion system for its future Alaska Class ferries that will be built by Vigor Shipyards in Ketchikan


Norwegian Orders Rolls-Royce Propulsion Upgrade

Norwegian Epic (Photo courtesy of Norwegian Cruise Line)

Norwegian Cruise Line has selected a Rolls-Royce permanent magnet tunnel thruster to upgrade the propulsion package onboard cruise vessel Norwegian Epic.     According to Rolls-Royce, the permanent magnet tunnel thruster offers numerous advantages over traditional tunnel thrusters






 
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