My favorite is the Flettner aeroplane since it uses the Magnus effect [1][2] as it generates lift without a wing. Screenshot linked in the original post [3].
For me this is the final proof we live in the Matrix and flight is achieved by an unholy ugly hack in a perl script. Jumbo Jets just don't look like they belong and that thing ... That whatever is just the machines taking the ps
[1] https://en.wikipedia.org/wiki/Magnus_effect [2] https://youtu.be/2OSrvzNW9FE [3] https://www.quora.com/Whats-the-most-ridiculous-aircraft-des...