| 摘要 |
A helicopter (1) has a horizontal rotor (2) driven for rotation about a vertical rotor axis (4), and a tail (9) extending backwards from the rotor axis (4) at a fixed angle (10) between about 20° and about 60° to a vertical longitudinal middle plane (7) of the helicopter (1) on a retreating blade side of the horizontal rotor (2). The tail (9) comprises a profiled body (16) including aerodynamic effective surfaces (19, 20) for selectively generating lift on the retreating blade side of the horizontal rotor (2) in forward flight of the helicopter (1). For hovering flight of the helicopter (1), the profiled body (16) can be swiveled about a swivel axis running parallelly to the main axis (21) of the tail for reducing a cross-sectional area of the profiled body facing the horizontal rotor (2).
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