Updated 11 Oct 2019

Over a century of diesel development

Internal combustion engines were first used for ships in 1912 but took more than 50 years to fully replace steam engines. Early…

Updated 11 Oct 2019

Giants of engineering excellence

Large marine engines are impressive examples of the engineer’s art and have improved in efficiency over time to today’s level…


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Updated 11 Oct 2019

The disappearing camshaft

For most of the history of the internal combustion engine, mechanical control of valves has been by way of a camshaft. In…

Updated 11 Oct 2019

Safety in numbers

With the notable exception of a small number of twin-propeller tankers and container vessels, most two-stroke engines are…

Updated 11 Oct 2019

EEDI driving efficiency improvements

For meeting EEDI purposes, the developments to the two-stroke crosshead engine in recent years have centred around increasing…

Updated 11 Oct 2019

Latest new models

In such a competitive field, regular releases of new models are essential to keep pace although it can be two or three years…

Updated 11 Oct 2019

Gas Code aids take-up of LNG

Of the three options for meeting the 2020 sulphur rules, LNG would seem to be ideal as it contains no sulphur and thus engines…

Updated 11 Oct 2019

Promoting LNG and other gases

In July 2016, a new impetus was given to promoting LNG with the formation of a coalition of partners known as SEA\LNG. The aim…

Updated 11 Oct 2019

Electrical assistance

Another turbocharger development of recent years is that by Japanese engine maker Mitsubishi. The company’s hybrid MET83MAG…

Updated 11 Oct 2019

Operating in sequence

Most large ships have engines with multiple turbochargers because of the need for sufficient air to support the combustion of…

Updated 11 Oct 2019

The old and the new, side by side

Two varieties of turbines are found on ships: steam turbines, which are external combustion systems, and gas turbines which are…

Updated 11 Oct 2019

Doing away with the Diesel engine

Another new technology that is forecast to revolutionise shipping is the use of fuel cells. It has to be said that the…

Updated 11 Oct 2019

Adding something extra

Partly to meet EEDI requirements but mostly in a genuine desire to reduce fuel use, shipowners are enthusiastically embracing…

Updated 11 Oct 2019

A choice of three transmission types

Between the engine and the final propulsor, three basic means are available to transmit the power from one to the other(s):…

Updated 11 Oct 2019

Managing electric drives

A power management system is needed to start and stop gensets and alternators according to the network load and the online…

Updated 11 Oct 2019

Putting power in its place

The final component of the drive system is the propulsor, of which there are many types. After paddle wheels became obsolete…

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