Dihedral changes airfoil thickness

[Nick Schneider]

I'm trying to mirror a wing I've created in CAD in VSP and I'm struggling with the inverted winglet. I've attached a CAD screenshot where I've drawn in the local airfoil sections, all of which have -1.5° of twist. 

The inboard winglet section is artificially thickened by VSP if I set the correct dihedral. I'm not sure which setting/mechanic causes this, as far as I can tell this effect is not geometrically forced by anything. I'd appreciate any pointers on how to more accurately model the wing in VSP!

[Rob McDonald]

I have some fixes for this stuff that should be rolling out soon. 

I actually have an evaluation copy with the changes up for some people to test, you can download it here...

https://openvsp.org/zips/OpenVSP-3.47.0-macos-14-ARM64-Python3.13_dihedral_twist_test2.zip
https://openvsp.org/zips/OpenVSP-3.47.0-win64-Python3.13_dihedral_twist_test2.zip

Some of the options at the bottom of the Wing Plan tab have changed, so check your settings there.



Rob

[Nick Schneider]

Thanks Rob, that did the trick!