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free balloon

American  

noun

  1. a balloon, often equipped to carry passengers, that drifts with air currents and whose ascent and descent are controlled by the release of ballast and buoyant gas.


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Contacted by Scientific American, the Federal Aviation Administration said that the agency has comprehensive regulations for U.S. operators to safely carry out unpiloted free balloon flights.

From Scientific American Feb. 23, 2023

So everybody who walks into Scott's office says, 'How about free balloon rides at five grand?

From Time Magazine Archive

Professor Auguste Piccard, who broke the altitude record in a free balloon in 1932,* is nearly ready to try for the undersea depth record too.

From Time Magazine Archive

Hardin, Mont. Altitude Sirs: Kindly inform me as to the maximum altitude obtained by any aviator whether in airplane or free balloon.

From Time Magazine Archive

Deriving its power of sustentation from the gas contained in the gas-bag, the free balloon is spherical in form.

From The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis by Various

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