The Digital Control Systems as Part of an Integrated Accessory Fit for Future Engines

The paper suggests that the traditional approach of designing the control system in isolation from the other accessories on a gas turbine engine may not provide the most cost effective total solution for an engine having a digital control system. It is considered that the integrity of the digital control can be maintained whilst providing additional functions not associated with its prime control task. This could allow the development of advanced monitoring systems to minimise life cycle costs and achieve maximum aircraft utilisation. Tne application of these principles to helicopter engines is discussed and an arrangement proposed whicn could provide substantial benefits both to the helicopter pilot and to the ground crew. Pilot workload would be substantially reduced by advising him of engine or aircraft management factors on a "need to know" basis. Operators would benefit from regular information on the operational status of the engines.