プロペラ無しで空を飛ぶ”ornithopter”

役に立たないかもしれないけど、おもしろいと思います。

An ornithopter (from Greek ornis, ornith- ‘bird’ and pteron ‘wing’) is an aircraft that flies by flapping its wings.

[📹 Iron Bird] pic.twitter.com/sD5cTrMj6x

— Massimo (@Rainmaker1973) September 15, 2024