| 摘要 |
PROBLEM TO BE SOLVED: To provide a captive balloon in which there is a low possibility that an attitude of a baloon becomes unstable even when the baloon received strong wind.SOLUTION: A captive balloon 1 has a baloon 10, a scoop 20, and single or plural mooring cables 30 to 33 of which one ends are connected to a surface of the baloon 10 and at least one of which is connected to the scoop 20. The scoop 20 has a first film part 21 which permeates air from one surface to the other surface thereof, and a second film part 22 having a percentage of air permeation from the one surface to the other surface smaller than that of the first film 21, and a part of the scoop 20 is joined to the baloon 10. |
