Journal of Failure Analysis and Prevention

, Volume 17, Issue 6, pp 1208–1216 | Cite as

Test Bed Calibration by Trend Analysis for Reliability of a Turboshaft Engine Performance

  • Simon K. John
  • R. K. Mishra
  • P. Balachandra Shetty
Technical Article---Peer-Reviewed


Aero-engine test bed is the most vital test bench or test equipment for assessing the performance of any aero-engine after production, repair or overhaul as per the performance specification. Aero-engine test bed thus requires periodic calibration as a part of any quality control checks of engine passing out as per the acceptance test procedure laid down for the engine. Periodic aero-engine test bed calibration includes not only calibrating the various sensors used in the test bed system independently but also subjecting the test bed as a whole for calibration with a master engine. While calibration periodicity of the test bed sensors is generally one year or so, test bed calibration as a whole is carried out once in two years. Calibration of test bed using a master engine is very expensive and sometimes not feasible due to non-availability of such engines belonging to early generation of fighter aircrafts. This paper presents a novel concept for calibrating engine test bed using trend analysis. It is mainly based on the performance data of engine acceptance tests carried out over a considerable period of time. This concept completely avoids requirement of a master engine and thus saves enormous effort in terms of cost and man-hours. The concept evolved has been used for calibrating a typical vintage test bed as the proof for validation and found the results comparable with the present trending pattern followed by other engine houses.


Calibration Measurement tolerances Correlation tests Repeatability tests Test bed Turboshaft engine 


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Copyright information

© ASM International 2017

Authors and Affiliations

  • Simon K. John
    • 1
  • R. K. Mishra
    • 1
  • P. Balachandra Shetty
    • 2
  1. 1.Regional Center for Military Airworthiness (Engines)BangaloreIndia
  2. 2.Department of Mechanical EngineeringNitte Meenakshi Institute of TechnologyBangaloreIndia

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