"We'll ask them to send a captive balloon up to five thousand feet," Swanson decided.
He has developed these helicopters so that he can control their flight by wireless from a captive balloon.
In communicating between points on land, poles of great height can be used, or captive balloons.
He did a good deal of sight-seeing of his own kind, and once went up in a captive balloon.
Both the bag of the captive balloon and the basket bore a black cross.
It was the big captive balloon edging into the air at the end of its cable with express- elevator speed.
Captive helicopters can be used for the same purposes as captive balloons.
A captive balloon was up in the air at this moment, but it was worse than useless.
"Why the blazes should I look at a captive balloon?"
He looked like a glistening captive balloon in shorts.
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