The Kouns-Craft dirigible helicopter was a hybrid aircraft designed in 1939 by Chinese-American cook Young Ho Koun. During it's sole flight attempt in front of the media, the aircraft was damaged and it never flew.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...r_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...helicopter.jpg
Previously:
https://www.homemadetools.net/forum/...247#post165588
https://www.homemadetools.net/forum/...919#post164163
https://www.homemadetools.net/forum/...269#post161484
https://www.homemadetools.net/forum/...508#post151269
https://www.homemadetools.net/forum/...521#post158809