Failure analysis of tail rotor control cables and tail rotor blades retrieved from the wreckage of a helicopter

Venkataswamy, MA and Sujata, M and Parameswara, MA and Bhaumik, SK (2004) Failure analysis of tail rotor control cables and tail rotor blades retrieved from the wreckage of a helicopter. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

Visual, stereo-binocular and scanning electron microscopic examination revealed that the tail rotor blades control cables in question have failed by overload under tensile load. Evidences also suggest that the failure of the control cables is secondary in nature and probably, has taken place after the impact of the helicopter with the ground. There was no deterioration in the strands of the cables due to usage. No meaningful information could be gathered from the available portion of the tail rotor blades so as to comment on whether or not any of the blades had hit solid objects prior to the accident. A detailed analysis of the failure is presented in this report.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Helicopter;tail rotor control cables;tail rotor blades;impact;overload failure
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
Depositing User: Mrs Manoranjitha M D
Date Deposited: 21 Jul 2011 10:56
Last Modified: 21 Jul 2011 10:56
URI: http://nal-ir.nal.res.in/id/eprint/9514

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