An Appraisal of a Number of Power Assessment Procedures being Proposed for Use in Chinook-Lycoming T55 Engine
Propulsion technical memo.
AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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In response to a request from RAAF HQSC a number of power assessment procedures for application to the Chinook-Lycoming T55 engine have been examined. The most satisfactory procedure was found to be the RAF Power Assurance Check PAC. However because the method has not been fully defined, and its monitoring period is currently set at 25 hour intervals, the procedure will require some refinement before it can be fully utilised. The potentially most attractive procedure is the Power Assurance Test PAT proposed in conjunction with the retrofitting of a full authority digital engine control FADEC to the T55-L11 engine. This latter procedure has a number of deficiencies associated with it and the RAAF should monitor its development closely before any decision is made to implement the procedures on a regular basis. Keywords Helicopter turboshaft engines Condition monitoring Monitoring instruments. Australia.
- Test Facilities, Equipment and Methods
- Jet and Gas Turbine Engines