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Propellers

New Propeller Optimization Process Can Analyze 10,000 Designs a Day

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A newly developed propeller optimizer makes it much faster to identify propeller-hull reactions and reach design decisions. In the EU project STREAMLINE the fuel efficiency of a chemical tanker was improved by optimizing the hull form and propeller. To this end, MARIN used its hull optimization program PARNASSOS EXPLORER and a newly developed propeller optimizer. The hull form itself was optimized for low resistance and for having a wake field as rotationally symmetric as possible, while simultaneously maintaining the displacement and sufficient space for the engine room. Meanwhile, the propeller was required to deliver the right thrust at the same ship speed and engine rate of revolutions. Normally, the propeller designer starts when the hull lines have been set and the main propeller parameters have been decided upon. These parameters follow from series analysis, such as the Wageningen B-Series, plus hands-on experience and rules of thumb to estimate the effect of propeller-hull interaction. For instance, the sector knows that the best propeller diameter in a wake field is smaller than given by the propeller series. Once the main dimensions are selected, the designer continues to mold the geometry until the efficiency is high and the hindrance from cavitation is as low as possible. This is a time-consuming process that is particularly ill-suited to finding the best propeller when considering 500 hull form variations can be generated, as was the case here


CP Propeller Drive Celebrates 100 Years

MAN B&W Diesel has been part of the propeller business from the very beginning. The first Alpha Controllable Pitch Propeller was produced in 1902 and patented in 1903. In the meantime, more than 6500 MAN B&W propellers have gone into service. A great variety of CP Propellers with Propulsion Control Systems for all applications up to to-day’s 30 000 kW range. On 3 December 1903 the CP Propeller patent came into force


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.


India Tankship to Retrofit MAN Kappel Propeller

MT Jag Lavanya: Photo credit MAN Diesel & Turbo

MAN Diesel & Turbo’s PrimeServ retrofit team is to supply India's Great Eastern Shipping Company (GESCO) of Mumbai with an upgrade retrofit propeller for their tankship 'Jag Lavanya', a Samsung 2004- built 105,000 dwt crude oil carrier.
 Kappel fixed pitch propellers
 MAN Diesel & Turbo recently announced a strategic focus that added the Kappel design to its fixed-pitch propeller portfolio, both for newbuildings and as a retrofit solution to vessels already in service


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


A Heavyweight on Display at SMM

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On Thursday morning a huge mobile crane placed the five-blade ship propeller in front of the main entrance of Hamburg's fair center, Hamburg Messe. The propeller is a head-turner at this year's SMM, the leading international trade fair of the maritime industry. Weighing in at around 80 metric tons, with a diameter greater than nine meters and a total blade surface area of 42 square meters, the ship propeller made by Mecklenburger Metallguss GmbH (MMG) is an impressive head-turner at this


Tests Prove CLT Prop Characteristics

The CLT propeller recently underwent real-world testing, which proved, according to its designer and manufacturer that the propeller can help to reduce or eliminate hull-induced vibrations and noise levels. Independent studies were conducted aboard Superfast Levante, which demonstrated that: the cavitation level developed on the CLT propeller blades is negligible from the ship's structural integrity point of view; vibration and noise levels are excellent in terms of comfort on board; and the


Do Propellers Sing?

The graphic shows the chamfering that goes from a 0.5 or 0.4 radius to the tip of suction side

By Leonardo Montoya, Rice Propulsion, in the January edition of MarineNews Yes, sometimes they sing: Some propellers in service produce a high-pitched noise, often referred to as “singing.” This sound typically is a clear harmonic tone much like a humming or a ringing wine glass. More of an annoyance than anything harmful, the causes of singing are not completely understood. Many theories have been put forward to account for the phenomenon of singing


New Solution for Measuring Hull Paint Performance

MACSEA offers an independent hull monitoring service designed to save fuel and reduce emissions by detecting hull fouling as early as possible. The new service, called Hull Medic, uses automatic onboard data acquisition to gather salient ship performance data and transmit it ashore for detailed analysis. Hull Medic will typically review 100,000’s of a ship’s data records per month, providing high-accuracy statistical analysis for earlier detection of hull fouling


MAN Propulsion Packages for New Icelandic Trawlers

New Icelandic trawler rendering courtesy of MAN

MAN Diesel and Turbo inform that Icelandic owners, HB Grandi, Vinnslustodin hf. and Hradfrystihusid Gunnvör, have ordered newbuildings based on two different ship designs from specialist fishing-vessel consultants and designers, Nautic and Skipasýn. Optimised for safety, operational economy and pulling power, the 50-metre-plus vessel series differ in their choice of specified propeller, aft-ship and propeller-nozzle configurations


New Towboat Honors Structural Engineer

Rex Dobson breaking the traditional bottle over his namesake (Photo: New Generation Shipbuilding)

Joe Gregory, owner of New Generation Shipbulding of Houma, La., reports that his firm’s latest delivery will join the La Porte Texas-based Martin Marine fleet of 29 inland push boats and 54 inland marine tank barges. Martin also operates four offshore tug/barge units.  


Diesel-electric Propulsion for 4 Semi-sub Ships

CSBC Corporation Taiwan has chosen Siemens to supply diesel-electric propulsion systems and other accessories for four 65,000-ton semi-submersible deck cargo vessels (SSDCVs). The country’s largest shipyard is building the vessels for a customer in Singapore.  


Thordon's Compac Ordered for 2 EcoCoasters

An artist’s impression of the VG EcoCoaster  design (Photo: Thordon Bearings)

Thordon Bearings’ Swedish distributor, Duwel Sweden, has signed a contract with Caterpillar Propulsion for the supply and installation of Thordon COMPAC seawater lubricated propeller shaft bearing systems to the two general cargo ships Dutch shipyard Royal Bodewes is building for


ClassNK to Issue Guidance on Composite Propellers

Classification society ClassNK announced it will release the world’s first Guidelines on Composite Propellers (Part on Manufacturing/Product Inspection) on August 31.   The strength and corrosion resistance of composite materials makes them widely used in fields such as aerospace


Hapag-Lloyd's New Noses Lower Emissions

Bulbous bow of the Hapag-Lloyd training ship Chicago Express (Photo: Hapag-Lloyd)

Hamburg based shipping company Hapag-Lloyd plans for 24 of the largest containerships in its fleet to get new bulbous bows by 2016, with some of the vessels also pegged to be fitted with optimized propellers, ultimately enabling lower fuel consumption coupled with fewer emissions.  


Research Vessel Concept a First for Voith

Photo: Voith Turbo

The new fisheries research vessel of the Shanghai Ocean University will be a first for Voith in several respects.   It is the first fisheries research vessel world-wide to use the proven Voith Schneider Propeller (VSP) propulsion concept


DNV-GL Approves Kongsberg Engine Room Simulators

Photo courtesy of Kongsberg Maritime

Kongsberg Maritime has received DNV-GL certification for three of its latest engine room simulator models designed to provide in-depth training on the K-Sim Engine simulator platform. The DNV GL-ST-033:2014-08 Maritime Simulator Systems certification


Incat Crowther Designs New Ferries for Singapore

Image: Incat Crowther

A new class of 33-meter catamaran passenger ferries has been designed by Incat Crowther for Majestic Ferries in Singapore, to operate between Singapore and Batam. With four of the vessels already under construction at PT Cahaya Samudra Shipyard in Indonesia, the design targets increased speed


Thrustmaster Equips Z-Drives with Mechanical Fuses

The USS Cairo is equipped with two (2) 750 HP Z-Drives model TH750MZ (Image: Thrustmaster)

Thrustmaster has been building brown water propulsion equipment for more than 30 years. Now the company’s American-made Z-Drive thrusters for inland waterway towboats are the first thruster in the industry to include a built-in mechanical fuse or quick release coupling.  


Rolls-Royce Power Package for USS Zumwalt

Photo courtesy of Rolls-Royce

Rolls-Royce announced delivery of the twin fixed pitch propellers to Bath Iron Works for installation on the U.S. Navy’s most modern surface combatant, the future USS Zumwalt, the first ship of the DDG 1000 multi-mission destroyer class.


Thordon Bearings Secures AK Ferry Contract

A Thordon COMPAC water lubricated propeller shaft bearing (image: Thordon)

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. The Canada-based company, a supplier of seawater-lubricated propeller shaft bearings


Strategic Marine’s Stock Program Full Power Ahead

StratCat26 CTV

  Strategic Marine, the specialist shipbuilder and fabricator, has confirmed its stock program of personnel transport vessels is market-ready. “Our stock program currently incorporates two class leading designs which are in high demand through its wide deployment capabilities and


Strategic Marine: Stock Program Full Power Ahead

Photo: Strategic Marine

Strategic Marine confirmed its stock program of personnel transport vessels is market-ready.  “Our stock program currently incorporates two class leading designs which are in high demand through its wide deployment capabilities and operating envelope,” said Reece Newbold


Van Oord Orders Two New Dredgers

Graphical representation of the new hopper-suction dredger (courtesy Van Oord)

Rotterdam-based dredging and marine contractor Van Oord has recently ordered two trailing-suction hopper dredgers as part of its continuous investment program.   The vessels will be constructed at CNN LaNaval Shipyard in Sestao, Spain with delivery dates scheduled for 2017.  


One More Z-Drive on the Job for EMS

Photo courtesy of Cummins

Enterprise Mariner Services, LLC (EMS) operates with the motto “Safe, Efficient, Reliable”. With the addition of their eighth Z-drive towboat and the fourth from Sneed Shipbuilding, the goal of maintaining that excellence is ever more assured.  






 
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