Analysis of failed components of a helicopter

Venkataswamy, MA and Parameswara, MA and Sujata, M and Bhaumik, SK (2005) Analysis of failed components of a helicopter. Project Report. National Aerospace Laboratories, Bangalore.

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The control tube has failed by rotating bending fatigue. Fretting was observed on the contacting surfaces of control tube - spider, tail rotor shaft – lower hub plates and hub plates – flex beams. This indicates high level of vibration in the tail rotor assembly. Analysis suggests that the damages were caused due to problems in the tail rotor side and the most probable reason appears to be vibration. The snubber bearings appear to have failed instantaneously due to sudden overload. This needs further confirmation.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Helicopter;control tube;pitch links;tail rotor shaft;tail rotor hub plates;snubber bearings;fatigue;fretting;overload;vibration
Subjects: AERONAUTICS > Aeronautics (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 20 Jul 2011 09:51
Last Modified: 20 Jul 2011 09:51

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