| 摘要 |
A hybrid annular airship of the kind including an annulus containing at least one gas containing portion is disclosed which is characterized by improved maneuverability, stability and speed. This improvement is effected by combined means comprising a pair of tubes mounted diametrically within the annulus and normal one to the other. A plurality of doors are provided for selectively closing off one or the other of the pair of tubes. Each tube is provided with a propulsion unit, having an access port, and preferably reversibly mounted therein. The tubes either are mounted on the same level or at different levels. Preferably, the propulsion units are jet engines which are individually operable. An elevator and a walkway preferably are provided communicating with each of the access ports leading to the propulsion units. Preferably, each access port has its own opening and closing mechanism.
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