Weird results from VSPAERO
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Tijs van Stijn
Nov 4, 2025, 1:54:09 PMNov 4
to OpenVSP
Hi there! As a school project, I am designing a DLG glider. I came across OpenVSP to simulate aerydynamics which I taught was a great idea to see if my design would actually fly. Only problem is now when I run the VSPAERO Solver I get weird results. Unrealistic most of the times. L/D's of 0,23, negative drag numbers and Cp clices that are all over the place. I've watched a few tutorials and looked at some other forums but I couldn't find a working solution / answer.
If anyone would like to help me I would really appreciate it!
Thank you in advance!
PS: I've included the .vsp3 file so you could take a look at my model.
If anyone would like to help me I would really appreciate it!
Thank you in advance!
PS: I've included the .vsp3 file so you could take a look at my model.
Rob McDonald
Nov 4, 2025, 2:57:35 PMNov 4
to OpenVSP
Your largest issue is that you're using the 'Shown' Set for both Thick and Thin.
If you instead put your fuselage in a Set for thick components, and your lifting surfaces in a Set for Thin -- and then set VSPAERO accordingly, you get something like this.
If you instead put your fuselage in a Set for thick components, and your lifting surfaces in a Set for Thin -- and then set VSPAERO accordingly, you get something like this.
Rob
Tijs van Stijn
Nov 4, 2025, 3:24:48 PMNov 4
to OpenVSP
Oh thank you! I must have missed that somehow.
Thank you for your assistance!
Thank you for your assistance!
Op dinsdag 4 november 2025 om 20:57:35 UTC+1 schreef Rob McDonald:
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