| 摘要 |
The two sides of the frame (2) of the craft lying in the direction of travel are elastic, and the frame forms a diagonally braced rectangle. A spoiler is fastened on the frame at the front and prevents lift, and has stabilising fins in the direction of travel. Two fastening points are located on the right and left on the rear section of the frame and are connected to a rope, upon which runs a ring. A rope for pulling purposes is fastened on the free-running ring.
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