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
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 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.
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
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
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
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
W&O, a global supplier to the marine and upstream oil and gas markets for pipe, valves and fittings, valve automation, and engineered solutions, announced that Senior Account Executive Tammy Emerson has been elected as vice president of programs of the Jacksonville Propeller Club. Emerson’s marks the first time in Jacksonville Propeller Club history that there is an all-female Executive Board. “Tammy has been an outstanding ambassador at W&O for many years
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 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
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 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
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
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
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.
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.
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.
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 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
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
The shipbuilding company VARD Group AS in Norway has received an order from a Canadian company for a shrimp stern trawler to be designed and equipped by Rolls-Royce, whose portion of the deal is worth in excess of £6 million. The fishing vessel
A new factory trawler fishing vessel being built for Norwegian marine trawling operator Halstensen Granit AS is to feature a complete Wärtsilä propulsion solution. The vessel is under construction at the Tersan yard in Turkey and the Wärtsilä equipment is
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
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 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