free balloon
Americannoun
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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
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
Reason: the density of the atmosphere decreases so rapidly that at eight miles it will barely support an airplane, at 23 miles a small free balloon has reached its roof.
From Time Magazine Archive
Dr. Auguste Piccard, professor of physics in Brussels University, last week ordered a 2,000-volt dry battery as equipment for a specially constructed free balloon with an airtight cabin.
From Time Magazine Archive
But, a little later in 1783, Rozier secured the honour of making the first ascent in a free balloon, taking up with him the Marquis d'Arlandes.
From A History of Aeronautics by Vivian, Evelyn Charles
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
