| 摘要 |
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. |
