| 摘要 |
A rotor (3) for a helicopter, having : a hub (5) rotating about an axis (A) and in turn having a number of blades; and an at least partly hollow drive shaft (6) connectable to a drive of the helicopter and connected functionally to the hub (5) to rotate the hub (5) about the axis (A); the rotor (3) also having vibration damping means (15) in turn having a mass (17), and an elastically deformable member (16) connected to the mass (17) and supported by the shaft (6); the member (16) extending at least partly inside the shaft (6), and being elongated parallel to the axis (A); and the mass (17) vibrating, in use, at such a frequency as to oppose transmission to the shaft (6) of the vibration produced by rotation of the hub (5) and blades.
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