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ReynoldsNo, Rob McDonald3

Oct 30

Thick & Thin Set Drop Downs are swapped between Case Setup & Moment Reference Position Sections

Great! And as always, Thank you for the very rapid response!!! On Thursday, October 30, 2025 at 4:28:

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Thick & Thin Set Drop Downs are swapped between Case Setup & Moment Reference Position Sections

Great! And as always, Thank you for the very rapid response!!! On Thursday, October 30, 2025 at 4:28:

Oct 30

Oct 30

Strange Value for derivatives in STAB Files

Good afternoon, I have build a somehow simplified model of a cessna 182 (cf file attached). I am

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Strange Value for derivatives in STAB Files

Good afternoon, I have build a somehow simplified model of a cessna 182 (cf file attached). I am

Oct 30

Ron, Rob McDonald2

Oct 29

Mesh Failure involving Multi-Section Wings with Cambered Airfoils

I can't give much in the way of suggestions without playing with your model. Please post it if

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Mesh Failure involving Multi-Section Wings with Cambered Airfoils

I can't give much in the way of suggestions without playing with your model. Please post it if

Oct 29

Filippo Pattacini

Oct 29

Non-dimensionalization in Stability analysis

Hello everyone, I need to clarify a few doubts about the non-dimensionalization of derivatives in the

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Non-dimensionalization in Stability analysis

Hello everyone, I need to clarify a few doubts about the non-dimensionalization of derivatives in the

Oct 29

Mohamed Hetta, Rob McDonald2

Oct 29

Getting NaN values for material laminates with cores.

3.46.0 introduced a new variant of lamination theory. The new theory can calculate the 3d through-

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Getting NaN values for material laminates with cores.

3.46.0 introduced a new variant of lamination theory. The new theory can calculate the 3d through-

Oct 29

赵天铭, … Brandon Litherland6

Oct 29

Can OpenVSP Calculate Propeller with Vx inflow and Vz inflow?

You should update to the latest OpenVSP for starters but that isn't the main issue. I understand

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Can OpenVSP Calculate Propeller with Vx inflow and Vz inflow?

You should update to the latest OpenVSP for starters but that isn't the main issue. I understand

Oct 29

Kudakwashe Mbisva, Rob McDonald3

Oct 28

creating a native open vsp model from stl files

When you import the STL file, you should be able to rotate the corresponding MeshGeom to align with

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creating a native open vsp model from stl files

When you import the STL file, you should be able to rotate the corresponding MeshGeom to align with

Oct 28

Leonardo Ungureanu, … Rob McDonald4

Oct 27

Advanced Flow Conditions tab

Wow, good catch. Looks like I need to change that format specifier to some variant of %g instead of %

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Advanced Flow Conditions tab

Wow, good catch. Looks like I need to change that format specifier to some variant of %g instead of %

Oct 27

Oct 27

Thin/thick representation

Hi! I can't seem to find the correct tessellation settings for my model. I would like to model

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Thin/thick representation

Hi! I can't seem to find the correct tessellation settings for my model. I would like to model

Oct 27

José Roberto Clark Reis, Rob McDonald2

Oct 26

Flow field vectors on wake/behind wing/Treftz plane

Jose, You can specify a set of velocity survey points in the *.vspaero setup file. The GUI won't

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Flow field vectors on wake/behind wing/Treftz plane

Jose, You can specify a set of velocity survey points in the *.vspaero setup file. The GUI won't

Oct 26

Leonardo Ungureanu, Rob McDonald5

Oct 24

Diverging results when having wing-fuselage intersection

I see, thank you. I'll try. Best Regards, L. Ungureanu Il giorno mercoledì 22 ottobre 2025 alle

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Diverging results when having wing-fuselage intersection

I see, thank you. I'll try. Best Regards, L. Ungureanu Il giorno mercoledì 22 ottobre 2025 alle

Oct 24

Mike Vivaldi, … Brandon Litherland21

Oct 23

Fuselage model results in no VSPaero results

Hey Brandon and Rob, I was wondering if there had been any insight on your end about this issue

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Fuselage model results in no VSPaero results

Hey Brandon and Rob, I was wondering if there had been any insight on your end about this issue

Oct 23

Oct 23

Getting negative CDi from VSPAero analysis

It looks like this is coming down to panel resolution. I already have CDi in the positive by

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Getting negative CDi from VSPAero analysis

It looks like this is coming down to panel resolution. I already have CDi in the positive by

Oct 23

Simon Boudoux, Brandon Litherland3

Oct 23

Stability analysis

Ok thanks for the answer I understand. So just to be sure along x-axis on the positive side it is

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Stability analysis

Ok thanks for the answer I understand. So just to be sure along x-axis on the positive side it is

Oct 23

Simon Boudoux, Brandon Litherland3

Oct 23

Thick-Thin set propeller

Hey, so disk is perfectly fine for me. I was wondering also like adding a propeller to my model is

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Thick-Thin set propeller

Hey, so disk is perfectly fine for me. I was wondering also like adding a propeller to my model is

Oct 23

Simon Boudoux, … Brandon Litherland7

Oct 23

Trouble with no lift at trim condition

Thanks for the answer it is really nice but i think some stuffs are a bit off for me I am not really

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Trouble with no lift at trim condition

Thanks for the answer it is really nice but i think some stuffs are a bit off for me I am not really

Oct 23

Charlie Raskopf, Brandon Litherland6

Oct 23

Problems generating trimmed surface .STEP file

https://openvsp.org/wiki/doku.php?id=workshop2025 Look for the Structures content. Have you done any

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Problems generating trimmed surface .STEP file

https://openvsp.org/wiki/doku.php?id=workshop2025 Look for the Structures content. Have you done any

Oct 23

Oct 23

Dark Mode Request for OpenVSP GUI

Hi Rob, First off, thanks for making such an awesome tool! I've been spending a lot of time

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Dark Mode Request for OpenVSP GUI

Hi Rob, First off, thanks for making such an awesome tool! I've been spending a lot of time

Oct 23

Rich Ouellette, … Mark Kotwicz Herniczek3

Oct 22

double-click .vsp3 opens VSP 1.7.92

I had a somewhat related issue where clicking on an openvsp file (.vsp3) in Windows 11 did not work

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double-click .vsp3 opens VSP 1.7.92

I had a somewhat related issue where clicking on an openvsp file (.vsp3) in Windows 11 did not work

Oct 22

Simon Boudoux, Rob McDonald4

Oct 22

Trouble with intersection between fuselage and tail

Ok so in fact I solved my issue by just moving a little bit the vertical tail down more into the

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Trouble with intersection between fuselage and tail

Ok so in fact I solved my issue by just moving a little bit the vertical tail down more into the

Oct 22

skyc...@gmail.com, Rob McDonald3

Oct 22

Tips for intersecting tail surfaces in VSPAero with the new thick/thin

I think I solved the issues with the top one, I had the HT at an incidence of -.25 degrees, which

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Tips for intersecting tail surfaces in VSPAero with the new thick/thin

I think I solved the issues with the top one, I had the HT at an incidence of -.25 degrees, which

Oct 22

Deepak, Rob McDonald4

Oct 22

Issues with results on Wing with Winglet

VSPAERO does not have the ability to generate an AIC matrix. To my knowledge, nobody has done any

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Issues with results on Wing with Winglet

VSPAERO does not have the ability to generate an AIC matrix. To my knowledge, nobody has done any

Oct 22

Simon Boudoux, Rob McDonald3

Oct 21

Trouble with VSP Airshow and VSPAERO

Ok thank you, I was doing that and so when i started to build a fuselage and wing for a similar shape

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Trouble with VSP Airshow and VSPAERO

Ok thank you, I was doing that and so when i started to build a fuselage and wing for a similar shape

Oct 21

Mike Kelly, Rob McDonald2

Oct 21

There has been some progress using the new adjoint capability to solve trim problems natively in

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There has been some progress using the new adjoint capability to solve trim problems natively in

Oct 21

Maryam Alkhateri, Brandon Litherland9

Oct 20

Different Propeller RPMs Effect

Although you will find extensive support for fundamental problems regarding OpenVSP, and often a

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Different Propeller RPMs Effect

Although you will find extensive support for fundamental problems regarding OpenVSP, and often a

Oct 20

Deepak, Brandon Litherland4

Oct 19

Failure to Export Wing Model out from OpenVSP Into Ansys for Flutter Analysis

Please attach your vsp3 file exactly as it is _before_ you export. View states and all. On Sunday,

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Failure to Export Wing Model out from OpenVSP Into Ansys for Flutter Analysis

Please attach your vsp3 file exactly as it is _before_ you export. View states and all. On Sunday,

Oct 19

Oct 17

P, Q, R Analysis

Good afternoon, I am working on an airship and I am trying to understand how does the P, Q, R

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P, Q, R Analysis

Good afternoon, I am working on an airship and I am trying to understand how does the P, Q, R

Oct 17

Asa Garner, … Brandon Litherland4

Oct 16

Blending Question

Gotcha, thanks for the responses. On Thursday, October 16, 2025 at 3:53:54 PM UTC-7 Brandon

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Blending Question

Gotcha, thanks for the responses. On Thursday, October 16, 2025 at 3:53:54 PM UTC-7 Brandon

Oct 16

ReynoldsNo, … Rob McDonald6

Oct 16

Crashing when Preparing Geometry with "Shown" components

I suspect it is a bug related to pointers.. Ubuntu builds are built with GCC, MacOS builds are built

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Crashing when Preparing Geometry with "Shown" components

I suspect it is a bug related to pointers.. Ubuntu builds are built with GCC, MacOS builds are built

Oct 16

Garrett Malmborg, … Brandon Litherland6

Oct 16

Issues with export to .stp or .igs

https://www.nasa.gov/reference/openvsp-skinning/ On Thursday, October 16, 2025 at 4:59:03 PM UTC-4

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Issues with export to .stp or .igs

https://www.nasa.gov/reference/openvsp-skinning/ On Thursday, October 16, 2025 at 4:59:03 PM UTC-4

Oct 16

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