Marine

Dossier

Candela C-7 speedboat

Hydrofoiling gives this serial production boat high speed and long endurance. Rory Jackson examines the engineering decisions behind its design

Show Report

Electric & Hybrid Marine World Expo 2018

Rory Jackson reports on some of the latest developments in maritime propulsion technology that were on show at this pre-eminent exhibition. Taking place in the RAI Amsterdam Convention Centre, the Electric & Hybrid Marine World Expo is the largest aquatic propulsion trade show in the world. This year’s event was the biggest yet...

Focus on...

Battery Safety

The EV battery industry offers a variety of ways to minimise the hazards they can pose, as Peter Donaldson explains. Proximity to large amounts of energy has always presented hazards, but people have mostly learned to live with them and enjoy its benefits. However, being close to a high-energy electrochemical system such as a 100 kWh battery is still...

Dossier

BB Green ferry

Rory Jackson looks at the development of this battery-powered ferry, which is aimed at shuttling workers to and from work. As more and more people find work in the major urban centres of the world, traffic congestion continues to worsen. While road networks struggle to cope with an ever-growing number of commuters, levels of driver stress and greenhouse gas...

Focus on...

Fuel cells

Nick Flaherty explains the issues at play when designing and building a fuel cell. Sometimes it seems that the specification and design of a fuel cell is more of an art than a matter of engineering. While the basics of the cells are clear, most often based around a stack of proton exchange membrane (PEM) cells...

In Operation

E-Kotug tugboat

A desire to cut maintenance costs prompted the development of this hybrid version of an existing tugboat. Rory Jackson reports. The E-Kotug is a diesel-electric tugboat owned and operated by international towage services provider Kotug Smit Towage. It is a hybrid-powered version of the Dutch company’s dieselpowered Rotortug design, which features three 360°...

Deep Insight

Power and torque density

How do you choose the most suitable type of motor for a given application? Peter Donaldson gets some expert input. One of the many challenges facing the developers of the BB Green ferry project was finding an electric propulsion motor of sufficient power, power-to-weight ratio, compactness and...

Dossier

Volabo ISCAD motor

Lawrence Butcher talks to two of Volabo’s founders about their concept for a traction motor that runs off a mere 48 V. t is generally accepted that in order to use an electric traction motor in a vehicle, where a relatively high power output is...

Grid

R-R saves battery life at sea

In the course of developing electric propulsion systems for a range of marine vehicles, Rolls-Royce has produced a new lithium-ion energy storage system called SAVe Energy (writes Rory Jackson). It was in development for 18 months before commencing certification by...

Deep Insight

Hydrogen

Nick Flaherty highlights some of the inroads developers are making into rolling out a range of hydrogen-powered vehicles. Many of the engineering challenges with converting hydrogen to electricity to drive a motor in a vehicle have been addressed over the past decade through the development...

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