Failure analysis of collector pinion of a helicopter

Madan, M and Suresh Kumar, M and Venkataswamy, MA and Sujata, M and Parameswara, MA and Bhaumik, SK (2005) Failure analysis of collector pinion of a helicopter. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

Evidences suggest that the collector pinion has failed by spalling. Spalling was the manifestation of surface contact fatigue resulting from high contact stresses on the working flank. Analysis showed that inadequate tip relief of the collector gear teeth could be the most probable reason for the failure. The material of construction, microstructure, and case and core hardness of the pinion were found to conform to specification. No metallurgical abnormalities were found responsible for the failure. In general, the load on the pinion appears to be on the higher side.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Helicopter;collector pinion;spalling;surface contact fatigue; tooth tip relief
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 05 Dec 2011 16:51
Last Modified: 05 Dec 2011 16:51
URI: http://nal-ir.nal.res.in/id/eprint/10108

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