| 摘要 |
PROBLEM TO BE SOLVED: To prevent pressure drop in a hull from being caused by leakage of flotation gas caused by housing damage in flight in an unmanned airship, and to provide a pressure maintaining method of the unmanned airship. SOLUTION: The unmanned airship comprises a hull 10, ballonets 20-40 that are disposed in the hull 10 and constituted by interconnecting a plurality of films with a hot melt type adhesive, blowers 60 for intake and exhaustion disposed in the ballonets 20-40, floating gas filled into the space (flotation gas bag) except the ballonets 20-40 in the hull 10, and a rubber heater 50 for heating the hot melt type adhesive of the ballonet 40. When deformation of the hull 10 or pressure drop in the hull 10 is detected, the pressure in the ballonet 40 is increased by an intake air operation of the blower 60, the hot melt type adhesive is melted by the rubber heater 50 to form an opening in the ballonet 40, and air in the ballonet 40 is supplied into the flotation gas bag via the opening. COPYRIGHT: (C)2006,JPO&NCIPI
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