Wagner Aerocar flying automobile. One prototype was built in the 1960s.
https://www.youtube.com/watch?v=hD5oN0G5h1I
Previously:
https://www.homemadetools.net/forum/...185#post207766
https://www.homemadetools.net/forum/...016#post160570
https://www.homemadetools.net/forum/...024#post187449
https://www.homemadetools.net/forum/...943#post175713
