What a Screwy Concept!
Aviation technology is developing at a rapid pace — especially in small unmanned air vehicles (sUAV). Some recent sUAV flights pushed the envelope by proving a concept that is, well, screwy.
I’m sure all of you have seen Leonardo da Vinci’s drawing of his aerial screw design. Back in the late 1480s, he envisioned this concept of how a person might be able to take flight.