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ENGINE testing and health monitoring has rapidly become a key element in the specialised customising, maintenance and overhaul services provided by Helikopter Service AS of Norway — one of the world's largest private helicopter operators. The Aviation Division of Industrial Acoustics Company (IAC) of Staines, Middx, UK has just completed a major project to design and construct a helicopter engine test facility for the company at its Stavanger site. The new facility is capable of testing any helicopter engine up to 5000 horsepower, and is the first to be built to give this level of flexibility across so many engine types.

Normalair‐Garrett Ltd., (Stand No. N31) part of the Westland plc Group of Yeovil, Somerset, is exhibiting a wide range of products which demonstrate the company's diverse capabilities in control systems and precision components for the aerospace industry.

CURRENT technological developments in aircraft engines demand highly sophisticated test cells and equipment. Research and development at an engine manufacturers plant is the preferred option to operating a flying test bed in actual conditions, since all kinds of emergencies and unlikely malfunctions can be safely demonstrated and long term development economically pursued. Many operators now have their own facilities; a trend which has been increasing for some time as the commercial sense and time saving potential inherent in testing at a ‘home base’ have become more accepted. Test facilities may be designed for a specific civil or military application but more probably in today's environment, will be capable of meeting the requirements of a number of products of varying sizes.

A review of the extensive development which has brought this engine to its current status; an assessment of what has been achieved; and an examination of future development programmes to match the engine to the needs of the helicopter industry.

WITH ITS enormous versatility in performing reconnaisance, troop‐carrying and attack roles, the helicopter is essential to defence forces all over the world.

A rig for the testing of helicopter engines has recently been completed at the works of Alvis Ltd., Coventry. The test plant was built by Heenan and Froude Ltd. of Worcester.

LYNN, Massachusetts — General Electric Company of the USA's Aircraft Engine Business Group has announced it has successfully initiated the first phase of core testing on its new 5,000 shaft horsepower class GE27 engine ahead of schedule.

INMARSAT was confident that it could satisfy demand for aeronautical satellite communications into the late 1990s with its present nine satellites, plus three INMARSAT‐2 satellites already on order, INMARSAT executives told aviation industry representatives recently.

A $20 million follow‐on contract for the completion of a further 100 Saab 340 commuter airliners has been won by Metair Aircraft Equipment Ltd, the sister company of Field Aircraft Services (East Midlands) Ltd.