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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


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


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


Catamaran Ferry Delivered to Majestic Ferries

HSC Catamaran Passenger Ferry Majestic 7 (Image: Incat Crowther)

The recently launched Majestic 7 is the first of four HSC catamaran passenger ferries designed by Incat Crowther to be delivered to Majestic Ferries in Singapore. Majestic 7, part of a multiple-vessel order which has been further expanded to include a pair of larger capacity vessels due to be


Volvo Penta Debuts New Diesel Engine and IPS

The new D8 and IPS15 package. (Photo: Volvo Penta)

Volvo Penta's concerted push into the commercial marine market continues with the introduction of the D8 diesel engine and the new IPS15 propulsion system   Ever since the global financial meltdown of 2008 briefly crippled the world leisure boat market


Retractable Flanking Rudders for Imperial’s Push Boats

Photo: Damen

Imperial Shipping has chosen Van der Velden Marine Systems retractable flanking rudder systems for its push boats.   The retractable flanking rudder system is an in-house innovation of Van der Velden Marine Systems (VDVMS). The system brings new efficiency to the inland shipping industry


Rapido Gee: 42m Utility Vessel Delivered

Photo: Incat Crowther

Rapido Gee, a 42m steel monohull utility vessel, has been delivered and is currently in transit to the Middle East. The vessel will be operated by Rashied Marine Services in the service of offshore platforms.   Designed by Incat Crowther and built by Strategic Marine


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


New Pilot Boat Delivered to Sabine Pilots

Port Arthur (Photo: Gladding-Hearn Shipbuilding)

Sabine Pilots in Port Arthur, Texas has received a new all-aluminum pilot boat, Port Arthur.   With a deep-V hull designed by C. Raymond Hunt Associates, the Chesapeake class pilot boat was built by Gladding-Hearn Shipbuilding, Duclos Corporation of Somerset, Mass. The vessel measures 53


Inspection Features Added to PropCad Premium

Image: HydroComp

It is common practice to inspect marine propellers to ensure the manufactured product meets the thickness and pitch specified by the design. PropCad Premium now introduces a tool for propeller builders and manufacturers - Inspection Maps, which allows users to create customized layout templates


AAPA to Join USDOT in Commemorating National Maritime Day

Kurt Nagle (Photo: AAPA)

Host of U.S. seaports also to observe annual salute to maritime industry, mariners and ports   A little-known annual American commemoration is coming up again on May 22: National Maritime Day, declared by Congress in 1933 to call attention to America’s maritime heritage and to honor


Passenger Vessel Spotlight: Vision of The Fjords

Image: The Fjords

The Fjords DA, operator of seven tourist ships in the Western Norwegian fjords, has revealed the name of the latest addition to its fleet. To be christened Vision of The Fjords, the 40m long hybrid craft is designed to push the possibilities of green technology and passenger experience.  


AAPA, USDOT to Commemorate NM Day Jointly

AAPA President and CEO Kurt Nagle Photo AAPA

 A little-known annual American commemoration is coming up again on May 22 - National Maritime Day. It was declared by Congress in 1933 to call attention to America’s proud maritime heritage and to honor the men and women who serve and have served as U.S. merchant mariners.


Life Extension for World’s Oldest Icebreaker

Voima (Photo: Arctia)

A comprehensive dry docking and life extension plan has been set out for the 62-year-old Finnish icebreaker Voima, continuing its run as the world’s oldest operational icebreaker. Commissioned in 1954, Voima is part of Arctia’s icebreaker fleet and has demonstrated its reliability


ClassNK Updates Steel Ships Survey/Construction Guide

Classification society ClassNK has released printed versions of its 2016 Rules and Guidance for the Survey and Construction of Steel Ships.   ClassNK regularly reviews and revises its technical rules and guidance in order to ensure that they are relevant and up-to-date.  


MAN Bags Danaos Shipping Propeller Order

Kappel propellers, Photo MAN

MAN Diesel & Turbo has won the order to supply Danaos Shipping Co. Ltd. with fixed pitch Kappel propellers, propeller boss caps with fins, and Engine Power Limitation for two container vessels – the 8,500 TEU ‘CSCL Europe’ and ‘CSCL America’.


Canadian Con-Ro Pair Drydocked in Gibraltar

Oceanex Sanderling  (Photo: Gibdock)

Gibdock's ro-ro and container ship repair work continues, following the drydocking of two con-ro vessels operated by Canadian shipowner, Oceanex. Oceanex provides intermodal transportation services to the Canadian Atlantic provinces of Labrador and Newfoundland. 


Ferus Smit Launches Arklow Cadet

Photo: Ferus Smit

Dutch shipbuilder Ferus Smit has launched its Nb. 424, MV Arklow Cadet, on June 9 at the Westerbroek yard. Bulk carrier MV Arklow Cadet is the first in a series of 10 vessels for Irish client Arklow Shipping. With a maximized hold volume of 220,000 cft and a carrying capacity over 5






 
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