2 Ergebnisse für: 175.257
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improve your english - YouTube
http://www.youtube.com/watch?v=kx21qAAdhuY
well, german improve your english
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World's first manned flight with an electric multicopter - YouTube
http://www.youtube.com/watch?v=L75ESD9PBOw
The first manned flight with an electric vertical take-off and landing multicopter (eVTOL) was performed by Volocopter. The flight lasted 90 seconds, after w...