Thanks, I might do just that, but I do not have a wind tunnel so do not really know the 0 aoa angle of my kiteHerman wrote: ↑Sun Sep 26, 2021 11:06 amTake a look at Wikipedia for Angle of Attack, this will help you define the term and see how the Coefficient of Lift varies with AoA.
Then learn how to set up a tether and take a look at the angles yourself. With care and knowledgeable assistant you could vary the kite trim on the tether and gently walk the kite back into the power zone to demonstrate the difference it makes, but you need somebody who knows exactly what they are doing!
A simplified answer to your slightly overcomplicated questions
Yeah, I thought it was angle with 0 lift and some airfoils I came across before seem to follow that. But Wikipedia agree with you obviously. I guess for some airfoils 0 Aoa can give plenty of lift and for some even give negative lift.
Interesting. So for fully powered kite it can be somewhere in 22 - 27 degrees I guess. And if kite is say 20 degrees into power zone it is 42-47 degrees. No wonder kites lose so much efficiency when sined and sheeted in fully then. They are practically at stall point at the edge of the window already when fully sheeted in!nixmatters wrote: ↑Tue Sep 28, 2021 2:04 pmA simplified answer to your slightly overcomplicated questions
Depends on if the kite was designed to sit forward in the wind window or deeper (e.g. wave kites).
1st question: I don't think that's a starting point for a kite designer.
The lowest AoA (bar sheeted out and front lines trim pulled in fully) is somewhere between 2° and 4°.
The max AoA (backstall point) can be easily calculated (6th grade geometry) if you know or can find the tow point of the bridle.
It would be pretty close, somewhere between front and rear line's direction.
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