| 摘要 |
- The present invention relates to a sight device for a rotary-wing aircraft having a hollow rotor hub (1), on which blades constituting the said rotary wing are mounted radially, and which is linked to the main gearbox (2) by a drive shaft coaxial with the rotor of the aircraft, the said sight device including a non-rotating sight head (3) mounted by means of a support (4), at the free upper extremity (5a) of a non-rotating mast (5), arranged coaxially within the said hub (1) and the said drive shaft of the rotor, the other extremity (5b) of which mast is fixed in the main gearbox (2), a ballbearing (6) coaxial with the rotor axis being provided between the said hub (1) and the said mast (5). - According to the invention, suspension means (7), intended to filter the excitations in roll and in pitch to which the said sight head (3) is subjected, are provided between the base (4a) of the support (4) of the sight head (3) and the upper extremity (5a) of the mast (5). <IMAGE> |
