Progressive aerofoil trailing edge for aircraft has flap, which can be adjusted both downward and upward by positive and by negative flap deflections respectively whereby aerofoil profile is closed on top side by sealing flap

摘要

Progressive aerofoil trailing edge has a flap (4), which can be adjusted both downward and upward by a positive and by negative flap deflections respectively. The aerofoil profile is closed on the top side by the sealing flap (7) and on the lower side by the ventilation flap (5) for using the flap as control flap with adjustments of the flap between negative and small positive flap deflections. The ventilating flap releases a flow from the lower side of the aerofoil (1) to the upper side of the flap and the sealing flap is removed from the upper side of the flap at a predetermined gap for releasing a downstream flow for using the flap as lift heightening flap with the adjustment of the flap between small positive and large positive flap deflection of the ventilation flap.