| 摘要 |
A flap device adapted for location on or in a fluid interfacing surface such as an airfoil section, the device comprising a housing, a flap mounted for rotation at least partially within the housing, an entry in a leading portion of the housing, and at least one stop member associated with the housing and actuable between a non-operative parked position and an operative position in which in use the stop member Is adapted to limit the movement of the flap within the housing thereby to vary the coefficient of lift and drag of the fluid interfacing surface or airfoil section.
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