VSPAero 3.46: Spanwise Lift Values

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Zak Conte

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Apr 20, 2026, 5:38:41 PM (4 days ago) Apr 20
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Hello OpenVSP Team,

When running VSPAero, I noticed my spanwise lift blowing up near the fuselage and wingtips. Is there any way I can reduce these effects?

spanwise lift.png
B2.2.vsp3

LABORO

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Apr 20, 2026, 5:40:02 PM (4 days ago) Apr 20
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Zach Hazen

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Apr 21, 2026, 5:51:52 PM (3 days ago) Apr 21
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Near the root, I would always expect some messiness at the fuse-wing intersection where the cl reporting is doing challenging math in the chordwise direction where it will cross over lifting and non-lifting bodies.  

At the tips, I have sometimes fought these artifacts off in panel mode with a combination of cap type and tessellation.  These days, I would leverage the thin <> thick combo.  The thin wing wingtips behave better as you can see in the quick example I made by removing the wing from the thick set and turning on your thin set
Screenshot 2026-04-22 094845.pngScreenshot 2026-04-22 094943.png

Since your fuse has a sharp trailing edge, you might consider a lifting element there if you can loft a continuous wing that represents the planform well enough for early design studies. Otherwise playing with root clustering may improve some of the pressure spikes at the fuse<>wing intersection.  Its challenging with a chine like this as the real-world behavior will be hard to capture with these methods outside of low AOA.  You should also twist this swept wing to avoid tip stall.

Best of luck!

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