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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

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

Wärtsilä Propellers to Drive Greek Tankers

A Wärtsilä Fixed Pitch Propeller fitted with the EnergoProFin. Photo Wartsila

TMS Tankers Ltd, one of the largest Greece based shipping fleet operators, has selected Wärtsilä fixed pitch propellers (FPPs) for its new vessels under construction in China. The order was placed with Wärtsilä's joint venture company in China, Wärtsilä CME Zhenjiang Propeller Co Ltd (WCME), in December 2015. Other leading Greek shipping companies have also recently opted for Wärtsilä FPPs.

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

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

Quick Propeller Repair Prevents Drydocking

One of the propeller blades was missing parts of its tip. (Photo: Hydrex)

Recently a team of Hydrex diver/technicians performed a propeller blade cropping on a 190-meter container bulker berthed in Hamburg. Two parts of the tip of one of the four propeller blades were damaged and needed to be cropped to restore the propeller’s efficiency.    Having developed different procedures for different kinds of damage, Hydrex teams are equipped and trained to make the best out of a bent or broken propeller

Rolls-Royce Wins Deal to Power USN TAO

Rolls-Royce won a contract to supply diesel generators, propellers and shaft lines for the US Navy’s new fleet replenishment oiler ships, the John Lewis Class. Planned to total 17 ships, the new John Lewis class (previously known as TAO – X) will increase the US Navy’s capability

Robert Alan Designed ATB Tugs for ITB Marine

ITB Marine Group Ltd. (ITB) is currently well into construction of the first of two, twin Z-drive, ATB pusher tugs photo Robert Alan

The ITB Marine Group Ltd. (ITB) is currently well into construction of the first of two, twin Z-drive, ATB pusher tugs for service on the West Coast of North America. The tugs are being built at their Annacis Island Shipyard near Vancouver. The tugs will be connected by an articulating pin system

Overcoming the Propeller Supply Bottleneck

Image: Hydrocomp

Hydrocomp’s ProCad facilitates in-house Process Control of Propeller Design and Manufacture.   Maritime Tactical Systems Inc. (MARTAC) is a Florida-based company building next-generation unmanned vessels for military applications

Ferus Smit Launches Arklow Cape

Photo: Simon Marrink

Shipbuilder Ferus Smit has launched new build M.V. Arklow Cape on Friday, October 21 at its Westerbroek shipyard in the Netherlands   Arklow Cape (Nb. 425) is the second vessel in a series of 10 that will be delivered to Irish owner Arklow Shipping.  

Vision of the Fjords: 2016 Ship of the Year

Vision of The Fjords (Photo: The Fjords)

 Vision of The Fjords, a futuristic carbon fiber tourist vessel operated by The Fjords DA, has won the Ship of the Year 2016 accolade at SMM in Hamburg.   The 40-meter-long, 399-passenger-capacity hybrid craft, which was completed by Brødrene Aa this summer

Wartsila Wins Deal for Four LNG Tankers

Wärtsilä will deliver a comprehensive scope of marine solutions from its own portfolio to four new LNG fuelled tankers for Swedish owners

Wärtsilä has been awarded a contract covering four newbuild tanker vessels. The ships are to be built at the Avic Dingheng shipyard in China, on behalf of three Swedish owners; Furetank (two vessels), Älvtank, and Thun Tankers, a fully owned subsidiary of Thunbolagen

MAN's G-Type Engine Notches 1,500 Orders

Illustration of the G80ME-C9 engine (Photo: MAN Diesel & Turbo)

Just six years after its introduction, MAN Diesel & Turbo has confirmed an order for the 1,500th G-type engine. Greek ship operator, Almi Tankers, will take delivery of the ultra-long-stroke 7G80ME-C9 type as prime movers for the two 317

Hornblower Flagship Retrofits with Thordon's Shaft Seals

Inspiration Hornblower has converted to the maintenance-free TG100 mechanical tail-shaft seals (Photo: Thordon Bearings)

Thordon Bearings’ US West Coast Distributor, Pacific Marine Equipment has successfully completed the installation of a pair of TG100 mechanical propeller shaft seals to Hornblower Cruises & Events’ 1000-passenger capacity twin screw flagship, Inspiration Hornblower.

Rolls-Royce to Equip Five New Cruise Ships

Promas System (Photo: Rolls-Royce)

Rolls-Royce has announced a new deal to provide propulsion and deck machinery to five cruise ships being built by Fincantieri at their Monfalcone and Ancona Shipyards in Italy.   The firm orders are to supply a Promas system, deck machinery and steering gear to two vessels being built

Con-Green 2000 - Next Generation of Feeder Vessels

Image: DNV GL

 The largest container vessels are designed for the greatest possible efficiency – maximum intake, minimum fuel consumption. Their smaller cousins, however, have not received the same level of attention – but this is beginning to change, says Jai Oh Sun, Engineer / Pre-Contract

Silence Your Ships

Plymouth University Marine Institute scientists are working with AutoNaut on a project studying how increasing levels of manmade noise in the sea is affecting marine life. (Photo: AutoNaut)

Anthropogenic (manmade) sound is creating havoc among marine mammals and other aquatic species. These creatures have very sensitive hearing, which they rely on to find food and mates and (for some) to communicate and navigate. Sound waves can travel much further and with much less loss of strength

Measuring Noise Levels of Cavitating Propellers

Figure 1: Cavitation pattern on the propeller of the research catamaran

As underwater radiated noise levels in the oceans increases, MARIN has investigated just how much cavitating propellers are to blame.   Traditionally, underwater radiated noise is mainly of interest for naval vessels and fishery research ships

New Zealand Navy Orders Polar-class Support Tanker

Image: Rolls-Royce

A new polar-class logistic support tanker for the Royal New Zealand Navy (RNZN) will be the first naval vessel to feature the Rolls-Royce Environship design with wave piercing bow.   The new vessel, which will replace the 30-year-old HMNZS Endeavor

Rolls-Royce Designs Stern Trawlers for Two Greenland Firms

Image: Rolls-Royce

Two stern trawlers of Rolls-Royce design are contracted to be built by the Freire Shipyard in Spain. The two vessels, both designed for catching shrimp, have been ordered by Greenland based ship owners Qajaq Trawl and Polar Seafood.  

Wärtsilä to Power Mediterranean's First LNG Ferry

Baleàrias new RoRo passenger ferry (Image: Wärtsilä)

Wärtsilä said it has signed a contract with Construcciones Navales del Norte SL (LaNaval) shipyard in Sestao, Spain for the design and supply of the LNG power and propulsion installation for a new RoRo passenger ferry being built for Spanish owner Baleària

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