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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


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.


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


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


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


Polar Cruise Ships to Feature Rolls-Royce Green Tech

Image: Rolls-Royce

Norwegian explorer cruise line Hurtigruten is to build two new expedition ships using a new and environmentally sustainable hybrid technology from Rolls-Royce making fully electric propulsion on a passenger ship possible.   The Rolls-Royce designed MS Roald Amundsen and MS Fridtjof Nansen


Jotun:ISO 19030 standard can make $30 bln impact on the industry

Geir Axel Oftedahl, Jotuns Business Development Director - HPS Photo Jotun

The International Organization for Standardization (ISO) has now published the long-awaited ISO 19030, a new standard conceived to measure changes in ship-specific hull and propeller performance. According to Jotun, which has led the industry in the standard’s development


ROBA-DS Shaft Couplings Certified by DNV GL for Offshore

Image source shutterstockam70

The compact and high performance ROBA-DS disk pack couplings by mayr power transmission have been certified by DNV GL. They ensure maximum possible operational and functional safety for users on the high seas. Whether in the drives of ship propellers


Wärtsilä EnergoProFin for CPP, FPP

Wärtsilä EnergoProFin energy saving solution increases propeller efficiency and creates fuel savings of up to five percent. Photo Wartsila

Wärtsilä EnergoProFin is a state-of-the-art energy saving solution that increases propeller efficiency and creates fuel savings of up to five percent. The solution is now available for both controllable pitch propellers (CPP) as well as fixed pitch propellers (FPP)


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.  


Incat Crowther Designed Ferry for Seychelles

Robust and Efficient Catamaran Ferry for Seychelles Photo Incat Crowther

Incat Crowther has designed a new catamaran ferry for Cat Cocos of the Seychelles. To be built by Richardson Devine Marine, the 292-passenger, 30m vessel will capitalize on the experience of the operation of the Incat Crowther-designed Isle of Praslin (delivered 2006) and Isle of La Digue


New Tall Ship to Feature Hybrid Propulsion System

Image: Corvus Energy

The San Francisco Bay Area nonprofit, Educational Tall Ship Program has ordered a 100kWh energy storage system (ESS) from Corvus Energy as a part of a hybrid electric propulsion system on board its new, 132-foot Brigantine tall ship, the Matthew Turner


Ship Design: Monitoring and Analysis for Emissions Reduction

Example of vessel whereby the amount of cargo carried is difficult to quantify in single MRV indicator. (Picture courtesy of Spliethoff)

Designing for ship performance: monitoring and analysis for CO2 emissions reduction   In April 2015, the European Union adopted a mandatory Monitoring, Reporting and Verification (MRV) regulation for CO2 emissions resulting from maritime transport


SNAME Honors Thordon's Sandy Thomson

SNAME honored Thordons Sandy Thomson. (Photo: Thordon)

At the opening session of the 2016 SNAME Maritime Convention in Bellevue, Washington, George A. (Sandy) Thomson was elected a Fellow of the Society of Naval Architects and Marine Engineers (SNAME).    According to the Society, the grade of Fellow is accorded exclusively to


MAN Diesel & Turbo Sells First HyProp ECO System

HyProp ECO plant (Image: MAN Diesel & Turbo)

MAN Diesel & Turbo announced that it has secured an order for a complete propulsion package for a chemical tanker. The order is significant in that it marks a “world-first”: the package is the first to feature a full HyProp ECO fuel-saving, hybrid propulsion system with PTO/PTH.


Retrofitting Containerships - Where The Savings Are

Seaspan project: Independent model tests confirmed energy savings just shy of 20 per cent for the 13.100 TEU vessel. Photo: DNV GL

 Despite the low fuel prices, energy efficiency is a key differentiator for shipping companies competing for cargo.   The Canada-based owner Seaspan has worked with DNV GL on a series of projects aimed at investigating possible efficiency gains through retrofits


Bruntons to Debut CPP System at METS

Image: Bruntons Propellers

A new controllable pitch propeller (CPP) system from Bruntons Propellers Ltd. will make its public debut at this year’s METS exhibition in Amsterdam, November 15-17.   Bruntons said it has spent several years developing a CPP propeller and its associated equipment which will solve






 
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