| 摘要 |
<p>The vertical take-off aircraft has a circular aerodynamic chassis with top and bottom feet, and one or more air-propulsion units. It can be completely free of any moving parts protruding outwards from it. Removable shutters can be mounted in the feet, in the path of the air jets generated by the propellers, or alternatively the feet can contain compartments with valves giving variable output, for fighting forest fires. The drive can be fixed at any required angle.</p> |
