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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.


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.


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


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


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


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


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


Pods Versus Water Lubricated Props

Image: Thordon Bearings

Thordon Bearings has called on the marine industry to investigate the characteristics of both conventional seawater-lubricated propeller shaft systems and podded propulsion arrangements in order to provide shipowners with a better understanding of the two very different propulsion configurations.


MN100: Voith Turbo

(Image: Voith Turbo)

The Company: Voith Turbo specializes in the design, manufacture and servicing of high performance driveline equipment. From drive components to electronic drive systems, technology from Voith Turbo impacts a wide variety of markets, including ship technology


Damen Optima Nozzle: A Boon for Inland Shippers

Flap rudder lowres Photo Damen

Damen Optima Nozzle is a big advantage for the North American inland shipping sector. The propeller nozzle developed and manufactured by Damen Shipyards Group's subsidiary Damen Marine Components (DMC) is suited for a wide spectrum of maritime uses and yields the most benefits for inland shipping


Blount Boats Delivers Chicago Tour Boat

M/V Skyview (Photo: Blount Boats)

Blount Boats of Warren, R.I. has delivered the M/V Skyview to Shoreline Sightseeing, marking the builder’s second delivery for the Chicago sightseeing company.   With a LOA of 100 feet and maximum beam of 35 feet, the steel Subchapter K passenger vessel designed by Seacraft Design


Controllable Pitch Propeller with Water-based Hydraulic System

Presentation of the DNV GL certificate by Dr. Olaf Richter (right) in the presence of his inspector, Dieter Ekat (2nd from left) who supported the test series, to Piening boss Mathias Pein (2nd from right) and his designer, Pierre Adam (left). (Phjoto: Otto Piening GmbH)

Otto Piening GmbH, a member company of the DEUTSCHE YACHTEN working group, is venturing for the first time into the development of controllable pitch propellers that can be operated using a water-based hydraulic system in place of oil.  


ATB Design Comes of Age

Kim M. Bouchard / B. No. 270 (Credit: Guarino & Cox)

The emerging trend of marrying the design of an articulated tug and barge (ATB) to a particular propulsion system to maximize efficiencies of that system has, of late, been taking hold in workboat markets. For example, one recent project involving a dynamic partnership between Bouchard


AkzoNobel Acheives ISO 19030 Compliance

AkzoNobel’s Marine Coatings business has outlined for the first time its full compliance with ISO 19030, the new standard for measuring hull and propeller performance. The requirements for ISO 19030 have been incorporated into AkzoNobel’s recommendations for hull performance monitoring


New Ferry MV Woods Hole Delivered

M/V Woods Hole during sea trials (Photo: Brian King)

The newly built ferry M/V Woods Hole has been delivered to serve Woods Hole, Martha’s Vineyard and Nantucket.   Built by Conrad Industries of Morgan City, La., the Elliott Bay Design Group (EBDG) designed ferry is the naval architects’ second design for The Steamship Authority


First VectRA 3000 Tug Delivered

(Photo: Sanmar)

Sanmar’s first VSP (Voith Schneider Propeller) tug, of the new VectRA 3000 series, named Arie A has been constructed for Italian operator Tripmare Spa of Trieste. The vessel has been delivered by a Redwise crew to Ashdod Port, located some 40 kilometers south of Tel Aviv where it will operate


Jotun: ISO Hull Performance Standard Final Stage

Photo:  Jotun

 The ISO 19030 is finally nearing publication, in a move that has the potential to save the shipping industry as much as USD 30 billion in annual fuel costs.   It’s taken 12,000 hours of development work, involving 53 expert stakeholders, across more than three years


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


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


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


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


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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