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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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14 Sept 1939 Jahr - First Helicopter
Beschreibung:
Igor Sikorsky successfully tests a helicopter in a tethered flight. In the USA.
Zugefügt zum Band der Zeit:
Flight Timeline
By
William Ferris
30 Nov 2018
0
0
308
Datum:
14 Sept 1939 Jahr
Jetzt
~ 86 years ago
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