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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.


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

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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


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


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


Incat Crowther Supplies Crewboat Design, Build Kits

Image: Incat Crowther

Incat Crowther has been awarded a contract with shipbuilder Astinave EP of Guayaquil, Ecuador for the supply of vessel design services and aluminum component kits for a pair of 22.5m monohull crewboats currently under construction for an undisclosed client


CASPER Teams up with ECKS MARINE

Copenhagen-based Propulsion Dynamics and Hamburg-based ECKS MARINE have signed an agreement to work together on the German maritime market with the goal of improving energy efficiency related to hull and propeller condition with Propulsion Dynamic’s CASPER Service.  


Thordon Bearings Launches Oil Savings Calculator

 Thordon Bearings Launches Oil Savings Calculator   Thordon Bearings has developed a bespoke modeling tool capable of calculating the amount of operational oil prevented from leaking into the world’s oceans with each installation of a seawater-lubricated propeller shaft bearing.


RSC Bio Solutions Hydraulic Fluids Earn MAN Approval

RSC Bio Solutions announced that its EnviroLogic 3068 and EnviroLogic 3100 high performance hydraulic fluids have been approved for use in MAN Diesel & Turbo systems. This approval allows RSC Bio Solutions to serve customers who have MAN stern tubes and propellers


Two Canadian Ferries to be Converted for LNG Operation

Image: Scott Arkell/Wärtsilä

Wärtsilä has been awarded the contract by Gdansk Shiprepair Yard Remontowa S.A., to supply a scope of engines, propulsion machinery, integrated automation systems, and gas handling systems required for the mid-life upgrading of two RoPax ferries and their conversion to operate on LNG fuel


MAN 32/40 Package for Chinese Dredger

Library photo of the MAN 32/40 engine (Photo: MAN Diesel & Turbo)

Jiangsu Haihong Engineering Technology Co., Ltd. has ordered four MAN 32/40 engines in connection with an order for two 8,000-cubic-meter trailing suction hopper dredgers.   MAN’s scope of delivery covers two shipsets, each including a propulsion package consisting of two 9L32/40


Suezmax Newbuilds Feature MAN Engines with EGR

Integrated design of EGR unit (orange) into an MAN B&W 6G70ME-C9 engine (Image: MAN Diesel & Turbo)

Hyundai’s Ship Building Division (HHI-SBD) has finalized a contract for two Suezmax tankers for Turkish shipowner, Ditas Shipping. The 158,000-cubic-meter crude-oil tankers will each be powered by individual MAN B&W 6G70ME-C9.5 two-stroke main-engines that feature integrated Exhaust


Pioneering Container Feeder Vessel Designs

ECX-3800 3800 TEU Feeder Vessel (Image: KNUD E. HANSEN)

The Danish naval architect company KNUD E. HANSEN has recently been developing a number of container feeder vessel designs. Each of the designs presents a series of innovations as part of a solution tailored to specific requirements.  


Evolutionary Carrousel RAVE Tugs Under Construction

The Carrousel Towing System system eliminates risk of capsizing under  tow load. In combination with two Voith Schneider Propellers arranged in-line, the tug design allows for a slender and highly efficient hull Photo Voith

In cooperation with R. Allan Ltd. (RAL) and Novatug B.V., Voith participated in the development of a new tug. The Carrousel RAVE Tug (CRT) is characterized by a towing winch on a ring. This ring can rotate freely around the tug's deckhouse – a unit referred to as the "Carrousel Towing


Wärtsilä Launches WTT-40 Transverse Thruster

The WTT-40 addresses market requirements for high power transverse thrusters for bow and stern applications

Wärtsilä is launching its new Wärtsilä WTT-40 transverse thruster. The first WTT-40's have been ordered and are scheduled for delivery during 2016. This first variant is part of Wärtsilä's new transverse thruster series and features a 4000 kW power level and a 3400


'Singing' Propellers Phenomenon Controlled

Singing Propeller -  Wärtsilä and City University London have in a joint research project succeeded in identifying the specific design parameters that create the risk of singing propellers. Photo Wartsila

A joint research project carried out by Wärtsilä and City University London has succeeded in identifying the specific design parameters that create the risk of 'singing' propellers. Though rare, 'singing' is nevertheless an annoying problem that occurs as a strong tonal noise originating


The New Standard in Transportation and Propulsion

Cargo vessel Coastal Standard (Photo: Coastal Transportation)

The latest addition to the Coastal Transportation fleet, MV Coastal Standard, was built at Dakota Creek Industries Shipyard in Anacortes, Wash. with a design developed to maximize cargo carrying capacity while minimizing construction and operating costs, according to the shipbuilder


Ports Toronto Gives Shape to Robert Allan Tug

Tug Iron Guppy – a new Robert Allan Ltd. ice-breaking tug taking shape for Ports Toronto

The Iron Guppy, a new custom 20 metre (65') ice breaking tug designed by Robert Allan Ltd of Vancouver is taking shape at Hike Metal Products Ltd in Wheatley, Ontario.   The tug is under construction for Ports Toronto and will replace the 1961 vintage William Rest which has served the port


Damen Delivers Hybrid Tug to Netherlands Navy

Photo: Damen

The first of a series of three ASD TUGs 2810 Hybrid was navigated into the Den Helder harbor by the Royal Netherlands Navy (RNLN) on Saturday, February 20. This hybrid tug that bears the name Noordzee is almost 29 meters long and is the first standard hybrid tug supplied by Damen that the RNLN


ME-GI Engines for World’s Largest Ethane Carriers

Eco Star 85K Very Large Ethane Carrier with its overall length of 231.60 m; maximum breadth of 36.60 m; maximum deadweight of 50,000 mt; and scantling draught of 12.30 m (Image: Hartmann)

JHW has ordered five 85,000 m3 Very Large Ethane Carriers (VLECs) for a JACCAR/Hartmann Reederei joint venture, called UEC (United Ethane Carriers); each vessel will be powered by a single MAN B&W 6G60ME-GI main engine. Dalian Shipbuilding Industry Offshore Co. Ltd






 
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