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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.

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

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

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

A Heavyweight on Display at SMM


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

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

Rolls-Royce Wins Multiple Steerable Propellers Contract

Photo: Rolls-Royce

Rolls-Royce has signed a contract for the delivery of 12 azimuthing thrusters to Sanmar Shipyard in Turkey, with an option for an additional 30 units.   The azimuth thrusters from Rolls-Royce, will provide propulsion for 6 tugboats rising to 21 if the option is exercised

Wärtsilä Propulsion for Antarctic Icebreaker

The new Polar Logistics Vessel will be powered by Wärtsilä machinery. Courtesy Wartsila

A new Polar Logistics Vessel being built for Terre Australes et Antarctiques Françaises (TAAF) and the French Polar Institute (IPEV), and which will be operated by the French Navy, is to be powered by Wärtsilä propulsion solutions

Thordon Wins Environmental Award

Thordon Bearings’ George Morrison was presented with the Tanker Shipping & Trade Environmental Award for the COMPAC system (Photo: Thordon Bearings)

COMPAC, Thordon Bearings’ seawater lubricated propeller shaft bearing system, won the Tanker Shipping & Trade Environment Award following a verdict that the system allows shipowners to cost-effectively comply with stringent marine pollution rules.  

Damen Marine Components Opens Jiangyin Plant

DMC Opens New Plant in China Courtesy Damen

  Damen Marine Components (DMC) is proud to announce the opening of its brand new facility in Jiangyin, China.Those present at the opening ceremony included CEO of Damen Shipyards Group RenéBerkvens and General Manager of DMC Jiangyin Aart Vogelaar

Royal Purple Debuts New Line of EALs

The BioMax EAL Gear Oil creates an ionic bond that adheres to metal parts and forms a synthetic film on metal surfaces, improving lubrication and maintaining longer lasting results on marine hydraulic gears. (Image: Royal Purple)

Synthetic lubricant manufacturer Royal Purple has launched its all-new BioMax line of Environmentally Acceptable Lubricants (EAL).   Royal Purple said its BioMax Environmentally Acceptable Lubricants meet all environmental standards mandated by the Environmental Protection Agency (EPA) and

New ‘Diesel Doctor’ Introduced

Image: Icon Research

Icon Research announced the launch of the new DK-20 Diesel Doctor instrument and version 6 engine analysis software.   The updated DK-20 has been built to be even more portable, rugged, easy to use and accurate with new features such as a touch-screen and built-in test

Rolls-Royce Propulsion for another Norwegian Ferry

Photo: Rolls-Royce

Rolls-Royce informs it has signed a contract to deliver two Azipull propellers for a new double-ended car ferry being built in Norway. The contract includes an option to supply propellers for two additional ferries. The new ferry will operate in North Norway for owner Torghatten Trafikkselskap

Wei-Li Crane Ship Departs Damen Shiprepair

Photo: Damen

The Wei-Li crane ship slipped her lines at Damen Shiprepair Dunkerque on Friday, September 11, to make the short trip up to Rotterdam after 10 days of maintenance and repairs.   The 141-meter, 18,330 DWT crane ship required special dock bed arrangements, not least because of the 3

Wärtsilä Adds Thruster to Inland River Portfolio

The new Wärtsilä WST-14 thruster

Wärtsilä introduces the latest addition to its thruster product portfolio, the Wärtsilä WST-14 steerable thruster, which represents state-of-the-art azimuthing propeller technology. It is aimed primarily at inland waterway cargo vessel applications

New Bulkers Launched into Fuel-saving Future

View of the Elsabeth C and Mirela tied up in port in China (Photo: MAN Diesel & Turbo)

One of the first commercial applications of MAN Diesel & Turbo’s new MAN Alpha Kappel FP propeller took place off the coast of China recently when the vessel Elsabeth C, a 58,500-dwt Supramax bulk carrier owned by Frontmarine Co. Ltd – an affiliated and managed company of

Odfjell's Tanker Overhaul Seeks to Slash Emissions by 20%

Bow Clipper is the first of Odfjell’s tankers to be upgraded (Photo: Odfjell)

Norwegian tanker shipper Odfjell announced it is upgrading the propulsion systems aboard 19 of its chemical tanker vessels in a move that aims to reduce its fuel consumption and emissions by up to 20 percent.   The upgrades, which include the retrofit of new energy efficient propeller

Incat Crowther Designs Ferry for Malaysia

Image: Incat Crowther

Incat Crowther has been commissioned to design a passenger transport ferry to be operated by Cataferry Sdn Bhd, in Malaysia.   The main deck features a full width cabin accommodating 151 passengers. This area includes interior seating, a cargo luggage area

MAN 32/44CR Engine for Trawler Newbuild

Image: MAN Diesel & Turbo

Voyager Fishing Company, Ltd., based in Kilkeel, Northern Ireland, has ordered a new trawler/purse seiner, designed by Salt Ship Design in Norway and to be built at Karstensens Skipsværft in Skagen, Denmark.   The newbuilding will be powered by a propulsion package comprising a MAN

Thordon’s COMPAC for US’ Largest Containerships

Artist impression of Matson’s Aloha-class containership (Image: Matson)

Thordon Bearings has signed a contract to supply COMPAC seawater-lubricated propeller shaft bearing solutions to two Jones Act containerships under construction at the Aker Philadelphia Shipyard Inc. (APSI) for Matson Navigation Company, Inc.   

Towboat Honors Structural Engineer Dobson

At the commissioning, left to right: Jason Adams, Owner Raymond Louviere Field Foreman; Donald Baudoin, shipyard superintendent; Rex Dobson, shipyard structural superintendent; and Bart Foret, Field Foreman

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

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