The Royal Navy is pursuing the ‘All Electric’ ship under its Marine Engineering Development Strategy. This strategy envisages the use of long life, fuel efficient, advanced cycle marine gas turbine alternator sets in an Integrated Electric Propulsion system, which includes the wide scale electrification of auxiliary systems. In 2000 the UK Ministry of Defence placed a contract on Turbomeca Limited, France, for the development of a 1.8MW advanced cycle gas turbine driving a high speed alternator, providing 800V DC output. The basic design details of this 1.8MW Gas Turbine Alternator (GTA), known as the ACL GTA, was presented at the Turbo Expo 2003 in Atlanta, Georgia. However, since 2003 the design of all the components has been finalised and testing has now commenced on this novel Gas Turbine (GT) technology. The purpose of this paper is to present the first of those test results and describe the final design of the unit on test by constituent parts. These include the bare GT, the recuperator, the directly coupled permanent magnet High Speed Alternator (HSA), its controller the Electronic Unit (EU) and the Monitoring and Control System (MCS). Information will be provided on the individual unit testing and how it is being integrated to ensure project success. The aspects of the design covering control of the power output, self-sustainability and ability to parallel or operate with other diesel generators or GTAs will also be discussed. As an introduction the paper will briefly reiterate the requirement for this GTA and discuss the importance of the commercial business case in conjunction with the military requirements so as to design and build a GTA capable of directly competing with diesel generators.

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