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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


Ferus Smit Launches Arklow Cliff

 Dutch shipbuilder Ferus Smit said it has launched M.V. Arklow Cliff, the fifth vessel in a series of 10 to be delivered to Irish ship owner Arklow Shipping.   The vessel, Ferus Smit newbuild #428, was launched June 30 at the builder’s Westerbroek yard.  


New Propulsor Leverages PM Technology

Image: Steerprop / The Switch

Finnish collaborators have unveiled a new propulsion unit. Azimuth propulsion specialist Steerprop has rolled out its new CRP ECO LM propulsor featuring permanent magnet (PM) technology from The Switch.   Steerprop has been developing propulsion units since 2001, while The Switch


SCHOTTEL Debuts Underwater Mountable Thruster

(Photo: SCHOTTEL)

SCHOTTEL has expanded its portfolio with the successful tests of the 5.5 MW SRP 800 U rudderpropeller, which can be installed afloat for vessels that cannot be docked easily due to their size or area of operation. Besides application in larger offshore vessels or rigs


Wärtsilä Dual-fuel Engines for Tanker Newbuilds

New tankers for Erik Thun AB will feature Wärtsilä propulsion and fuel supply solutions (Image: Wärtsilä)

Wärtsilä said it has been contracted to supply the engines, propellers and fuel supply systems for four new tanker vessels. The ships will run on both liquefied natural gas (LNG) and diesel, and are being built at the Scheepswerf Ferus Smit yard in the Netherlands for Sweden based Erik


MAN Diesel & Turbo, MM-Offshore Partner

Pictured at the signing ceremony at Nor-Shipping (from left): Jan Hamann – President MM-Offshore; Helge Schmale – General Manager MM-Offshore; Jens Ring Nielsen – Senior Manager Propeller and Aft Ship, MAN Diesel & Turbo; and Poul Knudsgaard – Vice President and Head of Propeller and Aftship, MAN Diesel & Turbo (Photo: MAN Diesel & Turbo)

Propulsion/maneuvering specialists agree to develop and optimize efficient aft-ship solutions for future ship designs   At a signing ceremony on June 1 at the Nor-Shipping trade fair in Norway, engines manufacturer MAN Diesel & Turbo signed a cooperation agreement with ship equipment


New Push Boat Delivered to Devall Towing

Photo: Laborde Products

Devall Towing and Boat Service pushes into the future with Mitsubishi Engines The newly built M/V Jackson Scott has been delivered to owner Devall Towing and Boat Service of Hackberry, La. The Jackson Scott is a 64’ X 27’ inland push boat, powered by two fully mechanical


Tropical Opts for Seawater Lubricated Shaft Package

Image: Thordon Bearings

Thordon Bearings’ Jacksonville-based distributor Coppedge Marine has secured an order with Tropical Shipping for the COMPAC seawater lubricated propeller shaft bearing system.    The COMPAC systems destined for two 300TEU box ships under construction in China


Rolls-Royce Launches V-Line Variant of B33:45 Engine

B33:45 (Photo: Rolls-Royce)

Rolls-Royce has launched a V-Line version of its highly successful B33:45 engine series. At 600 kW per cylinder the new design delivers 20 percent more power than the B32:40, in a compact design allowing more power in the same footprint as its predecessor, the manufacturer said.


Plenty Ships Wins Chinese Ferry Order

Photo: CoCo Yachts

CoCo Yachts – Plenty Ships has won an order with Zhuhai Fast Ferry Company to build two aluminum high speed ferries.   Zhuhai Fast Ferry Company has several fast ferries in its fleet, including two CoCo Yachts designed Coastal Cruiser 288


Wärtsilä Wins Contract for New CLdN RoRos

Wärtsilä will supply controllable pitch propellers and shaft generator systems for two new RoRo vessels being built for CLdN Ro-Ro SA. (Photo: CLdN Ro-Ro SA)

 Wärtsilä said it has been awarded a contract to supply controllable pitch propellers and power take off / power take home (PTO/PTH) shaft generator systems for two new RoRo vessels being built at the Uljanik shipyard in Croatia.  


MOL Rolls Out Refined PBCF

Image: Mitsui O.S.K. Lines

 Mitsui O.S.K. Lines has announced that its group company MOL Techno-Trade will start selling an upgraded version of its energy-saving Propeller Boss Cap Fins (PBCF).   MOL Techno-Trade has sold more than 3,100 PBCFs to ship owners all over the world.  


WAAMpeller: World First Class-Approved 3D Printed Ship’s Propeller

Left to right: Kees Custers, Research Engineer Damen Shipyards Gorinchem; Vincent Wegener, Managing Director RAMLAB; Wei Ya, Postdoctoral Researcher RAMLAB; Constantinos Goulas, Postdoctoral Researcher RAMLAB; Max van der Zalm, Design Engineer Damen Schelde Naval Shipbuilding; Don Hoogendoorn, Principal Research Engineer Damen Shipyards Gorinchem; Kelvin Hamilton, Technical Consultant Autodesk; and Laurens van Ballegooy, Sales Manager Promarin (Photo: RAMLAB/Damen)

A consortium of organizations are working toward a landmark achievement in the maritime sectors: creating the world's first class-approved 3D-printed ship's propeller.   As many sectors of the shipbuilding industry suffer due to overcapacity


Thordon, DDW-D Partner for Shaft Line Conversions

Terry McGowan, President and CEO, Thordon Bearings (seated right), and Mohammad Rizal (left), Chief Operating Officer of Drydocks World- Dubai, sign an agreement that affirms the two companies’ efforts to convert ships to seawater lubricated propeller shaft lines from oil (Photo: Thordon Bearings)

Thordon Bearings and Drydocks World-Dubai (DDW-D) have signed an agreement under which the UAE-based shipyard will work together with Thordon Bearings Inc. to promote the conversion of ships’ oil lubricated propeller shafts to Thordon’s COMPAC open seawater lubricated bearing system.


St. Johns Building Landing Craft Series

Photo: SJSB

Palatka, Fla. shipbuilder St. Johns Ship Building (SJSB) said it is currently constructing the first of three new vessels in a series of 190 foot landing crafts for a Caribbean group.   This vessel will be powered by twin 700 HP Cummings QSK19 with Schlottle rudder propellers


DMC Gdańsk Gains EN 1090, ISO 3834 Certifications

Photo: Damen

Damen Marine Components (DMC) Gdańsk, one of the Damen Shipyards Group’s locations for the production of steel components including propeller nozzles, rudder installations and cranes, has received EN 1090 and ISO 3834 certifications.  






 
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