Patent ID: 6360997
Filing Date: 2002-03-26
Classification: B64C

Abstract:
An automatic wing-flap apparatus for aircraft with a fuselage having opposed wings comprising:an aircraft fuselage having a first pair of opposed wings one on each side of said fuselage, a second pair of opposed wing-flaps to compliment said first pair of wings, one on each side of said fuselage, said second pair of wing-flaps having a rotating shaft connecting each of said second pair of wing-flaps to the other, said shaft parallel to the transversal axis of said aircraft, each of said second pair of wing-flaps having a first part and a second part, each said first part and second part having separate surfaces, said first part in front of and smaller than said second part, and both said first and second parts having different resistance to oncoming air during movement of said aircraft, whereby a rotation torque at each of said second wing-flaps is created as a function of said aircraft's speed, such that when retracted high speed said second pair of wing-flaps adopt a horizontal flap attitude, and when said second pair of wing-flaps are extended at low air speeds they act like extended flaps, and springs attached to said second pair of wing-flaps assist the action of said first parts of said second pair of wing-flaps.