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
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 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 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
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
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
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
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
W&O, a global supplier to the marine and upstream oil and gas markets for pipe, valves and fittings, valve automation, and engineered solutions, announced that Senior Account Executive Tammy Emerson has been elected as vice president of programs of the Jacksonville Propeller Club. Emerson’s marks the first time in Jacksonville Propeller Club history that there is an all-female Executive Board. “Tammy has been an outstanding ambassador at W&O for many years
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
New double-ended ferry serving the North Sea island of Norderney – Safe and eco-friendly maneuvering in shallow, high-sediment water using Voith Schneider Propellers Ferries operated by Norden-Frisia AG have been serving the East Frisian island of Norderney for many decades
In South Africa’s largest local shipbuilding contract Transnet National Ports Authority has ordered nine new Voith Water Tractors (VWT) for use in several ports across the country. This is also the largest order in the history of Voith marine technology.
Voith wins record contract for Voith Schneider Propellers In South Africa’s largest local shipbuilding contract Transnet National Ports Authority has ordered nine new Voith Water Tractors (VWT) for use in several ports across the country
MAN Diesel & Turbo says it has donated the equivalent of $115,000 dollars in service, spare parts and training to keep the engines of the hospital ship 'Africa Mercy', operated by Mercy Ships, in top condition to continue its charity work in Africa.
8365 Hwy 308 South Lockport, LA 70374 Tel: (985) 532-2554 Email: Robert S@bollingershipyards.com Website: www.bollingershipyards.com CEO: Donald “Boysie” Bollinger President: Chris Bollinger The Company: Established in 1946, the family owned and operated
Van der Velden Marine Systems BV, specialist in the field of manoeuvring and propulsion efficiency, will exhibit at the SMM 2014 International Trade Fair in Hamburg, which will be held from 9 until 12 September. Van der Velden can be found at stand Hall A4 – booth 208.
A Swedish and Dutch invention aims to eliminate misalignment, modernizing today’s shaft alignment practice. The Dynaligner is said to offer trouble free operation of marine propulsion trains, irrespective of ship operation condition or hull deflections
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.
Last month Hydrex installed Propeller Boss Cap Fins (PBCF) on a 289-meter tanker during the vessel’s stop in Mokpo, South Korea. A Propeller Boss Cap Fins (PBCF) can recover energy loss of a propeller hub vortex in the propeller’s backward flow
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
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
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
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
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
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