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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


Do Propellers Sing?

The graphic shows the chamfering that goes from a 0.5 or 0.4 radius to the tip of suction side

By Leonardo Montoya, Rice Propulsion, in the January edition of MarineNews Yes, sometimes they sing: Some propellers in service produce a high-pitched noise, often referred to as “singing.” This sound typically is a clear harmonic tone much like a humming or a ringing wine glass. More of an annoyance than anything harmful, the causes of singing are not completely understood. Many theories have been put forward to account for the phenomenon of singing


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


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


BMT’s Fleet Management System to Debut at Nor-Shipping

Photo: BMT SMART

BMT SMART Ltd., the specialist fleet and vessel performance management company of BMT Group, will launch its new SMARTFLEET Management system at Nor-Shipping in Oslo next month. Technical experts will be on hand to showcase the system and its capabilities whilst discussing with delegates their


USS Cairo: Crew Safety and Fleeting Efficiency

Photo courtesy of Carline Industries

Over that past 15 to 20 years there has been a revolution in U.S. ship docking tugs. Larger container ships and tankers made obsolete the conventional single and twin propeller tugs that could serve either line haul or ship docking functions


Kuwaiti Coast Guard Orders 29 Vessels

Photo: Tampa Yacht Manufacturing

The Kuwaiti Coast Guard ordered 29 new 44-foot fast coastal interceptor-class (FCI) vessels from Tampa Yacht Manufacturing LLC.   For the new builds, the Kuwaiti Coast Guard specified total drive solutions from Twin Disc, featuring Arneson ASD11 surface drives and Rolla propellers.  


Four New Tugs for the Port of Alexandria

Voith Water Tractor „Salam 6“ operating in the Suez Canal (Photo: Voith)

The Alexandria Port Authority has placed an order for four new Voith Water Tractors (VWT) to be built at different shipyards in Egypt. Two tugs with an engine power of 2 x 1,920 kW each will be propelled by two Voith Schneider Propellers VSP 28R5/210-2


Nakashima Propeller, ClassNK Hold Joint Seminar

Nakashima Propeller and ClassNK held a joint technical seminar in Hamburg on March 19.   Nakashima Propeller and ClassNK, from their respective roles in the industry, provide products and services to support ships through their lifecycle


New Player in the Rim Thruster Market

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Rim-driven thruster technology has emerged and demonstrated potential for compact and super-silent maneuvering propulsion.   Silentdynamics customized rim-thruster-based propulsion solutions applications include tunnel thrusters, and Silentdynamics ERT thrusters can be configured to be


Detyens Wins $15.8m Ship Repair Contract

USNS Lewis and Clark (Photo: U.S. Navy Military Sealift Command)

Detyens Shipyards, Inc. has been awarded a $15,812,647 firm-fixed-price contract from the U. S. Navy’s Military Sealift Command for a 75-calendar day shipyard availability for the regular overhaul and drydocking of USNS Lewis and Clark (T-AKE 1).  


Next Gen Tankers Delivered to Concordia Maritime

Stena Image (Photo courtesy of Concordia Maritime)

Concordia Maritime takes delivery of the next generation of chemical and product tankers   Concordia Maritime’s first chemical and product tanker based on the IMOIIMAX concept, the Stena Image, was delivered from the Chinese shipyard GSI (Guangzhou Shipbuilding International) in


Push Boats: From Turkey to Brazil

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The shallow draft market in South America continues to strengthen, powered by orders such as Hidrovias do Brasil S.A. 2013 deal for eight HB Pushboat ASUNCION-PYs, which represents a new generation of powerful Shallow Draft River Push Boat designed specifically for South America inland waterways


USCG Rescues Disabled Fishing Vessel

A 47-foot Motor Lifeboat crew from Coast Guard Station Gloucester, Mass., tows the 61-foot fishing vessel Angela Michelle to port, April 19, 2015.  (U.S. Coast Guard photo by Petty Officer 2nd Class Mark Robinson)

  A fishing crew is back on land today after a fouled anchor line stranded them about 115 miles east of Gloucester, Massachusetts, Saturday. Initially, the four-person crew aboard the 61-foot fishing vessel Angela Michelle contacted the Sector Boston Command Center when their line became


Port Klang Ensures Faster Turnaround for CMA CGM KERGUELEN

The CMA CGM KERGUELEN welcomed with a unique arrangement at the Port Klang Terminal

  The CMA CGM Group reported that during the CMA CGM KERGUELEN first call at the Port Klang Port Terminal in Malaysia, the terminal set up a unique arrangement for the vessel: no less than 12 cranes were simultaneously used to match the vessel's exceptional length (398 meters) and capacity


Twelve Cranes Unload Mega Box Ship

Photo courtesy of CMA CGM

The 398-meter-long containership CMA CGM Kerguelen made its first call at the Port Klang Port Terminal in Malaysia, arriving to a very unique arrangement, the CMA CGM Group announced.   No less than 12 cranes were used simultaneously to match the vessel's exceptional length and capacity (17


Great Lakes Shipyard Awarded Ferry Repair Contract

Photo courtesy of Great Lakes Shipyard

Great Lakes Shipyard has been awarded a drydocking contract for Miller Boat Line’s M/V Put-In-Bay.   The ferry was hauled out using the 770-ton capacity Marine Travelift at Great Lakes Shipyard. The repair contract includes drydocking, inspection and repairs


Hanjin’s Subic Shipyard Wins Bid for Six Boxship

Hanjin Heavy Industries & Construction’s (HHIC) Philippines-based Subic Shipyard Courtesy HHIC

  HANJIN Heavy Industries & Construction (HHIC)-Phil’s Subic Shipyard hit the jackpot bids. On April 20, the company said that it signed a deal to build six 11,000-TEU containerships for European and Asian shipping companies.


SCHOTTEL to Present Inland Offerings

Photos courtesy of SCHOTTEL

SCHOTTEL will present its expertise to the U.S. inland market at the upcoming Inland Marine Expo in St Louis, June 15-17, 2015: strong push boats in Brazil, big cargo vessels in Russia and comfortable river cruise vessels in Europe - recent projects prove the competence of German






 
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