a small nonrigid airship used for observation or as a barrage balloon.
One of several small, auxiliary gasbags placed inside a balloon or a nonrigid airship that can be inflated or deflated during flight to control and maintain shape and buoyancy.
a small nonrigid airship used for observation or as a barrage balloon.
One of several small, auxiliary gasbags placed inside a balloon or a nonrigid airship that can be inflated or deflated during flight to control and maintain shape and buoyancy.