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Propellers

New Propeller Optimization Process Can Analyze 10,000 Designs a Day

Propellors1 WEB.jpg

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.


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


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


Transport Of A Heavy FP Propeller

In February John Crane-Lips transported one of the world's heaviest fixed pitch propellers from its premises in Drunen to 's-Hertogenbosch. This 6-bladed propeller has a diameter of 8.8 meters and a weight of 92.5 tons. The material of which the propeller is made is Cunial©, an alloy of copper, nickel and aluminum. Upon arrival in 's-Hertogenbosch the propeller was lifted with a large hoisting crane to put it on a barge and was then shipped to the port of Rotterdam


Propulsion News

PBCF Aids Propulsion Efficiency Propeller Boss Cap Fins (PBCF) is a propeller enhancing device, which is designed to cut fuel consumption and exhaust gases by up to five percent while incurring no additional maintenance cost once installed. The unit, according to H. Yumoto Manager of PBCF Div. Mitsui O.S.K. Techno Trade, Ltd., is now operational on 720 ship worldwide. The PBCF rectifies the propeller hub vortex and recovers rotational energy otherwise lost in the propeller slip stream


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


Wärtsilä's JV with CSSC to Expands Engines Range

  Wärtsilä and China State Shipbuilding Corporation (CSSC) have signed an agreement to establish a joint venture for manufacturing medium and large bore medium speed diesel and dual-fuel engines. The CSSC Wärtsilä Engine (Shanghai) Co


HydroComp to Hold Propeller 'Mini-Workshop'

Photo courtesy of HydroComp

A special version of HydroComp's intensive Propeller Workshops will be brought to Tampa before the start of IBEX 2014.   The Mini-Workshop is a special version of HydroComp’s intensive Propeller Workshops for those involved in design


Horizon Delivers 4th 74’ Towboat for Canal Barge Co.

MV Jane Merrick: Photo credit Horizon Shipbuilding

Horizon Shipbuilding, Inc., Bayou La Batre, AL, has delivered the fourth in a series of 74’ towboats to Canal Barge Company, Inc. of New Orleans, LA.    The Jane Merrick is 74’ long with a 32’6” beam and an 8’6” draft


USCG Assists Stranded Charter Vessel

U.S. Coast Guard (USCG) crews are assisting a disabled passenger vessel approximately 13 miles east of Nahant, Massachusetts, Monday. Watchstanders at Coast Guard Sector Boston received notification at approximately 4:30 p.m., that the 83-foot passenger vessel Cetacea had a line entangled in


Caterpillar to Unveil Twin Fin Propulsion System

The Cat Propulsion Twin Fin System will debut at the 2014 ITS Hamburg Conference and Exhibition, June 16-20. (Image courtesy of Caterpillar Marine)

Caterpillar Marine will launch the Cat Propulsion Twin Fin System at the 2014 ITS Hamburg Conference and Exhibition, June 16-20. The Cat Propulsion Twin Fin System is a new diesel-electric solution that saves on fuel and emissions, while improving overall vessel performance, Caterpillar said


Kappel Propellers for Newbuild Bulk Carriers

Image courtesy of MAN Alpha Kappel

Lemissoler Navigation Co. Ltd., the Cyprus-based owner and operator, has selected the MAN Alpha Kappel propeller design for a new series of 8 × 58,500 DWT bulk carriers planned for delivery during 2015 and 2016. The 6.8-meter, slow-running


Cat Power Solution for Teekay Offshore

Image: Caterpillar Marine

Caterpillar Marine announced that Cat power and propulsion offerings have been selected to provide complete propulsion solutions for four ocean-going towing vessels designed by Ulstein Design and Solutions. Each vessel will have four 9 M 32 C propulsion engines, rated at 4,500 bkW at 600 rpm


Dynaligner Aims to Eliminate Shaft Misalignment

Dynaligner

More than 20 percent of all machinery claims, as well as catastrophic failure, off-hire and repair costs are caused by misalignment – the cause of almost all propulsion train damages Sweden’s Dynaligner AB said, adding that the problem is getting worse as modern ship design pushes the


MAN Propulsion System for New GEFO Tanker

MAN Diesel & Turbo has supplied a complete propulsion system comprising a 7L32/44CR engine, Renk gears and an Alpha adjustable CP propeller for an ultra-modern chemicals tanker operated by GEFO Gesellschaft für Öltransporte mbH


Wärtsilä Environmental Seal Systems First to Gain Recognition

Wärtsilä supports the underwater repair and maintenance of a broad portfolio of seal products. Performing critical maintenance to stern tube seals and other equipment while keeping the vessel in service enables uninterrupte

  Wärtsilä has received an important service level recognition for its Wärtsilä Airguard and Wärtsilä Oceanguard propeller shaft sealing systems from Lloyd's Register. The recognition of Lloyd's Register, a marine classification society


First of 12 UT4000 Crewboats Delivered

Baru Gorgona (Photo courtesy of Incat Crowther)

Incat Crowther announced the launch of Baru Gorgona, the first of a new series of 12 UT4000 Monohull Fast Supply Vessels to be built by ETP Engenharia Ltda. Additionally, Incat Crowther has signed a contract to supply the design of six further UT4000 FSVs to be built at Arpoador Engenharia Ltda


High-Tech Fincantieri Ferry For Quebec

Logo

  Fincantieri shipyard in Castellammare di Stabia (Naples) saw the launching today of the "F.-A.-Gauthier", the latest generation ferry that Fincantieri is building for Société des traversiers du Québec (STQ)


Amaroo Cruises Takes Catamaran Delivery

Photo: Imagery Motion Works

Incat Crowther today announced the launch of Amaroo, a 24-meter Catamaran Whale Watching vessel for Amaroo Cruises of Forster, New South Wales, who recently celebrated 35 years in operation. Built by Aluminium Marine in Queensland, Amaroo is the third Incat Crowther-designed vessel for the operator


Two Additional Voith Tugs For Alexandria

Photo courtesy of Voith

The Alexandria port authority has placed an order for two new tugs with the Egyptian Timsah Shipbuilding Company. Each vessel will be equipped with two VSP 28R5/234-2 Voith Schneider Propellers for a power of 3840kW.   Two virtually identical Voith Water Tractors (VWT) were put into


DMC Builds the Smallest Ever Nozzle

Photo courtesy of Damen

Damen Marine Components (DMC), part of Damen Shipyards Group, announced it has smashed its propeller nozzle world record by 33 percent downwards. This downsizing to an inside diameter of 665 millimeters only - from the previous 1,000 mm ‘entry level model’ - marks a new milestone for






 
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