
thumb|Pteryx Skybird radio-controlled ornithopter
thumb|Pteryx Skybird radio-controlled ornithopter
An ornithopter () is an aircraft that flies by flapping its wings. Designers sought to imitate the flapping-wing flight of birds, bats, and insects. Though machines may differ in form, they are usually built on the same scale as flying animals. Larger, crewed ornithopters have also been built and some have been successful. Crewed ornithopters are generally powered either by engines or by the pilot.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).