#5 Warning could not find interpolants

[Caíque Menezes]

Hi Dan,thank you for this amazing tool! Hey I'm getting this warning when it's reviewing the constraints: Could not find interpolants. And then shows me the last value of x coordinate and the previous one, in this case x:-1.297646631E-06 xmax=1.000000000.
Any idea of how can I fix this?
Thanks a lot!

[Caíque Menezes]

this is the seed airfoil

[Dan]

Hi Caíque,

I didn't see this message because the notifcation from SourceForge went in my junk email. I will take a look at your case soon and get back to you.

Dan

[Dan]

There were a couple things Xoptfoil was struggling with for your seed airfoil: figuring out the point ordering and finding the leading edge. I've improved the algorithms for both of these operations, and now your case is handled fine. These improvements will be included in the next release, or if you don't want to wait, they will be reflected on the Github development page later today (https://github.com/montagdude/Xoptfoil). I'll close this ticket after the next release.

[Caíque Menezes]

Alright Dan! I will look out for it after the next realese. Once again i would like to thank you for your amazing job it's being very helpfull to my team.

[Dan]

Xoptfoil 1.11.0 is out, and your case should work now. Please report back if it doesn't; otherwise I will close this. (Or you can close it if it does work.)

[Caíque Menezes]

Yes!!! I've just started the optimization and it does work now. I am also very excited to test the new feature to increase the lift curve slope. Thank you very much!