Helicopter rotor comprising a vibration damper, and method for updating the same
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United States of America Patent
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Nov 5, 2013
Grant Date -
Jul 22, 2010
app pub date -
Jun 19, 2008
filing date -
Jun 20, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A rotor for a helicopter, having: a hub rotating about an axis and in turn having a number of blades; and an at least partly hollow drive shaft connectable to a drive of the helicopter and connected functionally to the hub to rotate the hub about the axis; the rotor also having vibration damping means in turn having a mass, and an elastically deformable member connected to the mass and supported by the shaft; the member extending at least partly inside the shaft, and being elongated parallel to the axis; and the mass vibrating, in use, at such a frequency as to oppose transmission to the shaft of the vibration produced by rotation of the hub and blades.
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