Hello!
I am trying to us esome NACA airfoils to build the frame of my future blades.
Somewhere on the web I found that NACA 4412 airfoils are good for windmill purpose.
I am just wandering do I need to recalculate some blade angles ( front side angle), as the one that is drawn on the template seems too small to me.
Any other suggestions on airfoil templates??
I've downloaded Profili 1.2 program , and there are many airfoil templates in it( NACA, and also the other types), so it wouldn't be problem to build the frame.
I plan to do the frame of thin steel plate, and then to give it a shape by using some cloth and polyester. Steel shaft would be inside, connecting all the templates on 10 sections.
Not small job, but sure a good and secure blades in the finish.