| 摘要 |
PURPOSE: A glider and a hang-glider with a foldable hot-air balloon are provided to vertically take off the ground by the heat of the hot-air balloon unfolded and descend with the hot-air balloon folded. CONSTITUTION: A glider or a hang-glider is equipped with a foldable hot-air balloon. The hot-air balloon is unfolded and offers hot air for vertical take-off of the gilder or hang-glider. After reaching a specific height, the hot-air balloon is folded and the glider or hang-glider descends.
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