| 摘要 |
A toy plane with adjustable track of this practical new type consists of the airframe and wings made of light material such as physically cross-linked polystyrene foam. The characteristics are as follow: on the back-end extension surface of the airfoils, there is an empennage connecting with the back-end of the airfoils, and there are controls on the angle between the empennage and the airfoils. There is a flank vertical to the airfoil on the back-end of the upper surface of the airfoil, whose forepart is fastened at the airfoil. Also there are controls on the flank's swing on the upper surface of the airfoil. And there is a pothook at the forepart of the airframe. This practical new type is made by light material, which can realize the flight with the principle of spring. That is to say, put the pothook of the elastic and pull towards the back, after you loosen the elastic, the plane will fly away under the effect of elasticity. The track can be adjusted through altering the angle between the empennage and the back-end of the flank. The toy is extremely safe for playing, since the material is made by a light material with curved design, not easy broken material.
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