> the Coanda effect is not essential for a wing to work
Indeed. The easiest way to see that is to take a piece of paper about the size of a wallet size check and drop it while giving it a little bit of spin around the long axis. The paper will fly, and the reason it flies is exactly the same as the reason a non-spinning wing flies. See:
Indeed. The easiest way to see that is to take a piece of paper about the size of a wallet size check and drop it while giving it a little bit of spin around the long axis. The paper will fly, and the reason it flies is exactly the same as the reason a non-spinning wing flies. See:
http://www.av8n.com/how/htm/airfoils.html#sec-spinners