VSPaero issues while analyzing THICK control surfaces
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Lorenzo “Lollo” Minnozzi
Apr 29, 2026, 11:34:16 AMApr 29
to OpenVSP
Good morning fellow engineers,
As stated in the object, I'm experiencing difficulties when I add control surfaces.
I am using 3.49 on windows 11.
For some reason the Neutral Point (X_np) moves forward of 160 units ( on a total length of 1100) and I read in other topics that there is some kind of problems with .stab files when using thick mode but my file is not blank, just completely different.
Looks like there is some sort of
As stated in the object, I'm experiencing difficulties when I add control surfaces.
I am using 3.49 on windows 11.
For some reason the Neutral Point (X_np) moves forward of 160 units ( on a total length of 1100) and I read in other topics that there is some kind of problems with .stab files when using thick mode but my file is not blank, just completely different.
Looks like there is some sort of
Lorenzo “Lollo” Minnozzi
Apr 30, 2026, 7:23:49 AMApr 30
to OpenVSP
I'm pretty sure there will be someone who encounters the same problem so here it is how I "fixed" it.
1) Launch a simulation without the steady analysis and have a look at what the wakes do, they might cause problems if the panels are too small.
2) Non-Sharp trailing edges do NOT work with the control surfaces, I had a Cp of -21 there.
3) You get strange results if the control surface cuts one of the panel of the wing, I suggest having a section that perfectly encase the control surface
1) Launch a simulation without the steady analysis and have a look at what the wakes do, they might cause problems if the panels are too small.
2) Non-Sharp trailing edges do NOT work with the control surfaces, I had a Cp of -21 there.
3) You get strange results if the control surface cuts one of the panel of the wing, I suggest having a section that perfectly encase the control surface
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