What is described as a ‘revolutionary’ propeller hub vortex cavitation-eliminating boss cap has successfully completed validation tests at a hydrodynamic research centre in Sweden. The propeller hub – which could provide gains in propulsive efficiency for a wide range of vessels, including warships – will now undergo ship model basin trials to verify the efficiency […]
Donald MacPherson, technical director, HydroComp, Inc. The increased use of CFD for hydrodynamic analysis over the last decade has been remarkable, with tools becoming more commercially attainable and accessible. Designers are now looking to CFD for confirmation, optimisation and better understanding of the hydrodynamic aspects of their designs. While CFD is now expanding insights to […]
After nearly a decade in development, the announcement in January that French shipowner Neoline Armateur has signed a contract with a Turkish shipyard, RMK Marine, for the construction of the world’s first large sail-powered commercial cargo ship has been heralded as a landmark moment in the renaissance of wind propulsion. But while much of the […]
By Jose Gonzalez and Guntars Zommers Stolt Tankers, The Netherlands Biofouling is a major contributor to energy efficiency reduction; the ships spend almost their entire operational life afloat favoring the creation of biological layers (biofilm) and macrofouling populations in different working areas of the ship. The consequence of this occurrence is mainly reflected in additional […]
One of the biggest projects carried out by the German propulsion system supplier Voith over the course of 2021 involved the 161m offshore construction vessel North Sea Giant which is equipped with five Voith Schneider Propellers (VSPs), each with a diameter of around 4.5m, two located in the bow and three in the stern. The […]
This summer propulsion specialist SCHOTTEL celebrated its 100th anniversary with a party for its staff at the company’s headquarters in Germany. Postponed from the autumn of 2021 because of the pandemic, the gathering was an opportunity for the firm to reflect on an eventful history and dynamic present, but also to look to the future, […]
Shiprepair & Maintenance: 2nd Quarter 2022
A number of technical innovations are underway which will aid the industry’s sustainability agenda.
The shipbuilding industry in Northern Europe is under pressure, and the region’s high costs mean that potential orders have been lost to Asia. However, a new design concept from Dutch design and engineering company Conoship International Projects (CIP) looks set to give the industry a boost, while also reducing CO₂ emissions from shipping. Based in […]
The Naval Architect March 2022
Investment and installation of wind propulsion is starting to ramp up, according to the IWSA’s secretary-general.
Shiprepair & Maintenance: 3rd Quarter 2021
Preparations are underway for the retrofit of a novel propulsion and steering system, a design concept refined by the University of Strathclyde
The Naval Architect June 2021
Rotor and wing sails, an emerging trend for wind assisted propulsion on bulk carriers.