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For the first time in the world, a flying machine, heavier than the air and distinct from the airplane, has completed a circuit of four kilometers (nearly 2.5 miles) at a height of more than 25 meters (82 feet) above the ground.
September 6, 2013
July 1, 1923
Work of the US Gov. Public Use Permitted.
AUTOGIROS - CIERUA 1-4 (SPAN )
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