| 摘要 |
In the case of a variable-pitch propeller (7) or repeller (53) according to the invention, the pitch-adjusting device (10) is arranged in the hub (9) and formed in such a way that it allows only a numerically limited number of different blade pitches, preferably just two blade pitches, for which purpose the pitch-adjusting device (10) comprises an electrical drive device (20), for moving the blades (11) from a first blade pitch to a second of the numerically limited number of blade pitches, and an electrically actuable locking device (40), for locking the blades (11) in the numerically limited number of different blade pitches. |
