Flettner aircraft which creates lift via the Magnus effect.
More:
https://en.wikipedia.org/wiki/Flettner_airplane
https://en.wikipedia.org/wiki/Magnus_effect
https://en.wikipedia.org/wiki/Flettner_rotor
Previously:
Nemeth Parasol airplane - photo
Morphing airplane wings - videos
1930s Uppercu Burnelli UB-20 airplane carries Ford convertible - photo
Riout 102T Alérion Ornithopter flapping wing airplane - photo
1950 trailer truck airplane - GIF, video, and photos
1942 wooden P-51 Mustang airplane wheels - photo
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