Erich von Holst on Wikipedia
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Erich von Holst on Wikipedia
https://youtu.be/VdrwOs9owuM
Uploaded on Jan 15, 2008
Quote:
Historic footage of Erich von Holst ornithopters (flapping-wing aircraft) constructed in the 1930s. Also includes slow motion footage of bird flight and Holst's unusual "thrust-wing" concept.