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Is 15.50 gallons as big as a Hot Air Balloon?

It's about one-thirty-five-thousandth as big as a Hot Air Balloon
The size of a Hot Air Balloon is about 580,000 gallons.
(four-person capacity; envelope volume; average)
The average volume of a hot air balloon sufficient to lift four adults is 580,000 gallons. Typically made of nylon or dacron, a balloon envelope of this size typically weighs just 88 kg (190 lbs).
There's more! See other comparisons to 15.50 gallons...