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418 cubic yards is about one-tenth as as a Hot Air Balloon.
In other words, it's 0.15 times the of a Hot Air Balloon, and the of a Hot Air Balloon is 6.7 times that amount.
(four-person capacity; envelope volume; average)
The average volume of a hot air balloon sufficient to lift four adults is 2,900 cubic yards. Typically made of nylon or dacron, a balloon envelope of this size typically weighs just 88 kg (190 lbs).
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