>>1461018See how fast it goes with almost zero wind:
https://youtu.be/hpZvn3YtPYYCurrent propellers are great designs considering they were created mostly in the early 20th century, but for today's standards it's very stagnant. I think the last significant progress in propeller shape was the Scimitar:
https://en.wikipedia.org/wiki/Scimitar_propeller