| 摘要 |
<p>For the artificial production of an airstream, intended for suspending persons in air, there is used of a collapsible and transportable apparatus in the form of a supporting frame which is adapted to be set up on a flat base and which comprises a wind tunnel in which is located an air accelerating unit with an associated flow rectifier. The wind tunnel is desirably in the form of a cylinder or a truncated cone. The suspension area is restricted by means of nets in order to protect the floating persons. One net is arranged above the flow rectifier and another one above the device as a whole. The top net is arched upwardly by the airstream produced, and for the purpose it comprises a central layer which is impermeable or almost impermeable to air. A stand for spectators is arranged around the supporting frame and also provides access for persons proceeding to the air stream.</p> |
