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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


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


W&O’s Emerson Elected Propeller Club VP

Tammy Emerson

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


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


Caterpillar to Equip 4 AHTS for Grupo CBO

The design An illustration showing what the Havyard 843 will look like when it is completed in a few years time.

  Caterpillar Marine informed that its Cat® power and propulsion solutions have been selected to power four AHTS vessels for Grupo CBO, headquartered in Rio de Janeiro, Brazil.  Each AHTS vessel will be equipped with 4 x 6 M 32 C propulsion engines rated at 3000 bkW and Cat


AHTS Proves Strength on (in & through) Ice

Brage Viking: Zamakona built, Caterpillar MaK powered, Ice capable

While the large oceangoing variety of ships garners the lion’s share of attention in regards to Arctic operations, modern offshore vessels that will be required to support potential oil and gas business in the region are equally vital. Viking Supply Ships recently carried out full scale ice


Partnership Promotes Seawater Lubrication

Scott Groves (left), Business Development Manager at Thordon Bearings, and Leslaw Hnat (right), Chairman of the Board of MSR Gryfia, sign an agreement that affirms the companies’ efforts to convert ships to seawater lubricated propeller shaft lines from oil.

Thordon Bearings Inc. signed a letter of intent (LOI) under which it will cooperate with MSR Gryfia of Poland to promote the conversion of ships to an open seawater lubricated propeller shaft Thordon bearing system from a sealed oil lubricated propeller shaft bearing system.   


DSME Returns for More Dual-Fuel Engines

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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


Mitsubishi: First-Ever Licensing Deal to Chinese for Marine Propellers

The signing ceremony.

Mitsubishi Heavy Industries Marine Machinery & Engine Co., Ltd. (MHI-MME), a group company of Mitsubishi Heavy Industries, Ltd. (MHI),  concluded a licensing agreement with Changzhou Zhonghai Marine Propeller Co., Ltd. (CZZH) under which MHI-MME provides CZZH the manufacturing and


First Bulk Carrier Delivered to ADM of US

Newly developed bulk carrier with MALS

  The first unit of a new bulk carrier developed by Mitsubishi Heavy Industries, Ltd. (MHI), a vessel offering superlative energy efficiency and environmental performance, was delivered today to Archer Daniels Midland Company (ADM) of the U.S


Oshima-built Grain Carrier Delivered in the US

Newly developed bulk carrier with MALS (Photo: MHI)

Today the first unit of a new bulk carrier developed by Mitsubishi Heavy Industries, Ltd. (MHI) was delivered to Archer Daniels Midland Company (ADM) of the U.S., following its completion at Oshima Shipbuilding Co., Ltd. of Nagasaki, an MHI licensing partner.


Teekay Renews Hull and Propeller Monitoring for LNG Carriers

Daniel Kane

Canada-based shipping company Teekay Corporation has renewed its contract with Propulsion Dynamics for its hull and propeller performance monitoring system CASPER Service. The Computerized Analysis of Ship PERformance (CASPER Service) from Propulsion Dynamics is a turnkey subscription service


Wärtsilä Propulsion Equipment for 2 Fishing Vessels

Lunar Fishing

  Two new 78 metre purser/trawler fishing vessels being designed and built at Karstensen Shipyard in Denmark will feature Wärtsilä's main propulsion and control equipment. The ships have been contracted by Lunar Fishing, the Scotland based fishing company and will operate in the


Cruise Newbuilds Feature Seawater Lubrication

Thordon COMPAC seawater lubricated propeller shaft bearings fitted to bronze carriers

The Viking Star, a47, 800GTcruise ship, is one of three Viking Ocean Cruises’ newbuilds to opt for Thordon COMPAC seawater lubricated propeller shaft bearings. Constructed at Fincantieri’s Marghera shipyard, the 944-passenger Viking Star is the first of three new ships equipped with


Propeller Design Software Upgraded

Image: HydroComp

HydroComp PropCad 2014 released HydroComp PropCad is software for geometric modeling of marine propellers for design and manufacture that provides automatic preparation of 2D design drawings, 3D offsets, thickness classification reports and CAD/CAM data


US Navy Aircraft Carrier Leaves Drydock

About 500 shipbuilders assisted with the undocking of the aircraft carrier USS Abraham Lincoln (CVN 72) on Monday. Lincoln was moved from a dry dock to an outfitting berth at Newport News Shipbuilding, where its refueling and complex overhaul will be completed. Photo by Ricky Thompson/HII

Newport News Shipbuilding completes drydock work for aircraft carrier USS Abraham Lincoln (CVN 72); refueling and complex overhaul With tugboats guiding it into the James River, the aircraft carrier USS Abraham Lincoln (CVN 72) was moved from one of Newport News Shipbuilding’s drydocks to


Wärtsilä’s New CPP System

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At SMM Wärtsilä introduced its latest development of large Controllable Pitch (CP) Propellers, based on the previously known E-hub type. The new Wärtsilä CP propeller system addresses the demands of medium and large size vessel owners


MAN Diesel & Turbo Bags Chinese Ferry Orders

MAN Diesel & Turbo to supply four 9L4860CR engines for the diesel-mechanical propulsion of two passenger ferries

  MAN Diesel & Turbo has secured a contract for the supply of four 9L48/60CR engines for the diesel-mechanical propulsion of two passenger ferries for Chinese shipping companies, Huadong Ferry and Dadong Ferry. The two newbuildings are currently under construction at Huanghai Shipyard in


"The Switch" Passes Bench Test

The Switch, a specialist of megawatt-class permanent magnet (PM) machines and frequency converter packages for advanced wind and marine drive trains, has successfully tested its PM shaft generator in a rigorous bench test in Vaasa. The first pair in an order of four PM shaft generators is part






 
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