Before each flight, the envelope lies on the ground partially filled with air.The pilot walks around inside it, checking for rips and holes through which air might leak.

• 每次飞行前，气囊都是半充气状态放在地上，然后飞行员绕行检查它，寻找每一个可能会在飞行途中造成漏气的缝隙和漏洞。