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The Helicopter
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The Helicopter
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It took many attempts to get a helicopter into the air, but once it got there, air travel was transformed forever. Let's explore the evolution of the flying machine that left planes in the dust.
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Authors
Infobase
Makematic (Firm)
Subjects
Closed captioning.
Helicopters.
Inventions--History.
Language
English
Series
DK Inventions that Made History