초록 ▼

An improvement to a flying disc that returns to the user by means of a string using rotational energy in a manner of a yo-yo. The flying disc has a lower wing 1 that generates a lift, a smaller wing 2 and an axle 3. Between the wings 1,2 is a string 4 attached to the axle. The flying disc has at lea

An improvement to a flying disc that returns to the user by means of a string using rotational energy in a manner of a yo-yo. The flying disc has a lower wing 1 that generates a lift, a smaller wing 2 and an axle 3. Between the wings 1,2 is a string 4 attached to the axle. The flying disc has at least one circular airfoil 11 and there are openings inside the area bound by its inner edge and the axle 3. Air currents from the direction of the flight that pass over and under the airfoil 11 are able to effectively mix through these openings. When slung with the string 4, the flying disc starts to rotate rapidly and flies away. It returns to the user when winding the string 4 back in the manner of a yo-yo.

대표청구항 ▼

1. A returning flying disc comprising a lower wing [1], an upper wing [2] of smaller diameter mounted axially, and between these an axle [3] connecting the wings perpendicularly with a clearance between them, and a string [4] or corresponding part that is attached to the axle [3] and that can wind a

1. A returning flying disc comprising a lower wing [1], an upper wing [2] of smaller diameter mounted axially, and between these an axle [3] connecting the wings perpendicularly with a clearance between them, and a string [4] or corresponding part that is attached to the axle [3] and that can wind around this axle so that when allowed to fly the flying disc returns as the string winds back into a free space between the wings, characterized in that the lower wing [1] has at least one circular airfoil [11] generating lift on horizontal flight, and that there are openings within an area bounded by an inner edge of the circular airfoil [11] and the axle [3], so that the air-currents from a direction of flight that pass over and under the airfoil [11] are able to mix through these openings, axle (3) being disposed below an uppermost point (11a) of the airfoil (11). 2. A flying disc according to claim 1, characterized in that the upper wing [2] and the axle [3], when viewed from a side, lie substantially between planes that are projected by revolving around a vertical axis those lines perpendicular to it that pass through a uppermost and the lowermost points of the airfoil 11]. 3. A returning flying disc comprising a lower wing [1], an upper wing [2] of smaller diameter mounted axially, and between these an axle [3] connecting the wings perpendicularly with a clearance between them, and a string [4] or corresponding part that is attached to the axle [3] and that can wind around this axle so that when allowed to fly the flying disc returns as the string winds back into a free space between the wings, characterized in that the lower wing [1] has at least one circular airfoil [11] generating lift on horizontal flight, and that there are openings within an area bounded by an inner edge of the circular airfoil [11] and the axle [3], so that air-currents from the direction of flight that pass over and under the airfoil [11] are able to mix through these openings the upper wing [2] having at least one circular airfoil [21], and that there are openings within the area bounded by the inner edge of the circular airfoil [21] and the axle [3], so that air-currents from the direction of flight that pass over and under the airfoil [21] are able to mix through these openings. 4. A flying disc according to claim 1, characterized in that the airfoil [11] of the lower wing [1] is joined to the axle [3] by two or more wing spokes [12] with openings between them. 5. A flying disc according to claim 3, characterized in that the airfoil [21] of the upper wing [2] is joined to the axle [3] by two or more wing spokes [22] with openings between them. 6. A flying disc according to claim 5, characterized in that the wing spokes [12] and [22] bend in a curve towards hub areas [13] and [23], and that parts of the said spokes that are nearest to a vertical axis of the flying disc and the hub areas [13] and [23] form the axle 3]. 7. A flying disc according to claim 1, characterized in that the upper surface of hub area [13] of the lower wing [1] and the bottom surface of the hub area [23] of the upper wing [2] are main joining area of the said wings. 8. A flying disc according to claim 1, characterized in that an area of the openings is at least 50% of the whole area bounded by the inner edge of the circular airfoil [11] and the axle 3].