Is 15.50 gallons as big as The Goodyear Blimp?
It's about one-one-hundred-thousandth as big as The Goodyear Blimp
The size of The Goodyear Blimp is about 1,520,000 gallons.
(for GZ-20A)
The Goodyear GZ-20 model Blimp measures 1,520,000 gallons in total volume. A December, 1929 college football game between the University of Florida Gators and the University of Oregon Webfoots (later the University of Oregon Ducks) began with the blimp dropping a parachute-equipped ball from a height of 61 m (200 ft) to the field below.
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