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49,600 barrels is about two-and-a-half times as big as a Hot Air Balloon.
In other words, the size of a Hot Air Balloon is 0.380 times that amount.
(four-person capacity; envelope volume; average)
The average volume of a hot air balloon sufficient to lift four adults is 19,000 barrels. Typically made of nylon or dacron, a balloon envelope of this size typically weighs just 88 kg (190 lbs).
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