Groups

OpenVSP

1–30 of 3323

The OpenVSP discussion group is the place to ask questions, report problems, make requests, or just discuss OpenVSP. When joining, give us a short message about why you want to join. It helps us separate real people from the bots.

0 selected

Brendan Kelly, Rob McDonald3

Apr 3

Inconsistancy with the Vinf field in 3.48.0

Thank you. With this new information, I am getting a realistic lift coefficient. My total drag

unread,

Inconsistancy with the Vinf field in 3.48.0

Thank you. With this new information, I am getting a realistic lift coefficient. My total drag

Apr 3

Joep de Boer, Rob McDonald2

Apr 3

low numerical precision in CP_H

What version of OpenVSP are you running? I believe this has been fixed in recent versions. Rob On

unread,

low numerical precision in CP_H

What version of OpenVSP are you running? I believe this has been fixed in recent versions. Rob On

Apr 3

Apr 3

unstable lateral and directional static stability

After making the necessary changes, I was able to get good pitch static stability numbers. But

unread,

unstable lateral and directional static stability

After making the necessary changes, I was able to get good pitch static stability numbers. But

Apr 3

Rob McDonald, Miroslav Grulovic2

Apr 2

OpenVSP 3.49.0 Released

Thanks for sharing. On Thursday, April 2, 2026 at 10:04:20 PM EDT, Rob McDonald <rob.a.mcdonald@

unread,

OpenVSP 3.49.0 Released

Thanks for sharing. On Thursday, April 2, 2026 at 10:04:20 PM EDT, Rob McDonald <rob.a.mcdonald@

Apr 2

Jasper, Brandon Litherland4

Apr 2

Trouble with Error: ambiguous flow-through subsurface detected

Got it to work by inserting the VSP3 file into a fresh 3.48.2 version new model. Weird. Anyway, as

unread,

Trouble with Error: ambiguous flow-through subsurface detected

Got it to work by inserting the VSP3 file into a fresh 3.48.2 version new model. Weird. Anyway, as

Apr 2

Arshad Basha, Rob McDonald15

Mar 31

Non linear CMy vs CLt graph

I see. Thanks for your insight. On Tue, Mar 31, 2026, 8:33 PM Rob McDonald <rob.a.mcdonald@gmail.

unread,

Non linear CMy vs CLt graph

I see. Thanks for your insight. On Tue, Mar 31, 2026, 8:33 PM Rob McDonald <rob.a.mcdonald@gmail.

Mar 31

Eric Cheng, … Rob McDonald7

Mar 29

Inconsistent calculation results of VSPAERO

The Karman Tsien option has been removed from VSPAERO. I don't know if it will come back. Rob On

unread,

Inconsistent calculation results of VSPAERO

The Karman Tsien option has been removed from VSPAERO. I don't know if it will come back. Rob On

Mar 29

Avijeet Acharya, Rob McDonald5

Mar 28

Problems with CFD Mesh after creating Control Surface

Thanks for that idea. I'll see if I can use conformal components for this purpose. Regards

unread,

Problems with CFD Mesh after creating Control Surface

Thanks for that idea. I'll see if I can use conformal components for this purpose. Regards

Mar 28

Erik Fougner Arnesen, … Rob McDonald7

Mar 24

Version 3.48.2 : Static margin jumps around AOA = 3 deg in stability analysis

Thank you very much it helped a lot! Now the results do not changes sign between test cases. I also

unread,

Version 3.48.2 : Static margin jumps around AOA = 3 deg in stability analysis

Thank you very much it helped a lot! Now the results do not changes sign between test cases. I also

Mar 24

Mar 23

2026 OpenVSP Workshop Registration is Open

Registration is open for the 2026 OpenVSP Workshop. The Workshop will be August 4-6, 2026 at Embry-

unread,

2026 OpenVSP Workshop Registration is Open

Registration is open for the 2026 OpenVSP Workshop. The Workshop will be August 4-6, 2026 at Embry-

Mar 23

Di Wu, Rob McDonald2

Mar 21

Fuselage calculation problem

First, you're using an old version of OpenVSP with an old version of VSPAERO. You should upgrade.

unread,

Fuselage calculation problem

First, you're using an old version of OpenVSP with an old version of VSPAERO. You should upgrade.

Mar 21

Xue Yan, Zach Hazen4

Mar 16

Trouble in Exporting Control Surfaces to STP/IGS/STL Files

Wow, it looks like a solution for my trouble, thanks a lot! Let me have a try! 在2026年3月16日星期一 UTC+8

unread,

Trouble in Exporting Control Surfaces to STP/IGS/STL Files

Wow, it looks like a solution for my trouble, thanks a lot! Let me have a try! 在2026年3月16日星期一 UTC+8

Mar 16

Joe Mumo, … Rob McDonald11

Mar 15

I don't think wanting a Dark Mode is inappropriate at all. I also think it is within reasonable

unread,

I don't think wanting a Dark Mode is inappropriate at all. I also think it is within reasonable

Mar 15

Julien, … Rob McDonald5

Mar 15

Design Variables Constraints in Adjoint Optimizer

For the VSPAERO optimization, OpenVSP is not 'in charge', and the OpenVSP API does not really

unread,

Design Variables Constraints in Adjoint Optimizer

For the VSPAERO optimization, OpenVSP is not 'in charge', and the OpenVSP API does not really

Mar 15

Mike Vivaldi, … Rob McDonald6

Mar 14

Result interpretation

Yes, the local calculation is informed by local properties -- velocity, chord, Mach number, and

unread,

Result interpretation

Yes, the local calculation is informed by local properties -- velocity, chord, Mach number, and

Mar 14

Pavankumar Koratikere, Rob McDonald2

Mar 14

Driver group for a wing section in Python API

Not at this time -- it looks like an oversight. That said, the SetDriverGroup API call was added with

unread,

Driver group for a wing section in Python API

Not at this time -- it looks like an oversight. That said, the SetDriverGroup API call was added with

Mar 14

Brandon Litherland, … deenri...@gmail.com6

Mar 13

VSP Airshow Information Missing

Update: I've tried the "sign in with email" option with both my work email and personal

unread,

VSP Airshow Information Missing

Update: I've tried the "sign in with email" option with both my work email and personal

Mar 13

Avijeet Acharya, … Rob McDonald7

Mar 12

Capturing Blunt Trailing Edge

I'll look forward to the fix, while using v3.36 in the meantime. Thanks for your replies. Avijeet

unread,

Capturing Blunt Trailing Edge

I'll look forward to the fix, while using v3.36 in the meantime. Thanks for your replies. Avijeet

Mar 12

Mar 11

Documentation on the calculation of stability derivatives

Hello, Is there any documentation on the calculation of p, q, and r derivatives? Also, what are the

unread,

Documentation on the calculation of stability derivatives

Hello, Is there any documentation on the calculation of p, q, and r derivatives? Also, what are the

Mar 11

Calioth, Brandon Litherland7

Mar 10

Help with mismatch in CeRAS aircraft model.

Hi. A little update here, so I analysed the lifting surface only using VSPAERO and then added the

unread,

Help with mismatch in CeRAS aircraft model.

Hi. A little update here, so I analysed the lifting surface only using VSPAERO and then added the

Mar 10

Marcos Tejeda, … Brandon Litherland6

Mar 10

Fuselage issues in CompGeom

Thanks a lot, Brandon! El lunes, 9 de marzo de 2026 a la(s) 3:03:51 pm UTC-3, Brandon Litherland

unread,

Fuselage issues in CompGeom

Thanks a lot, Brandon! El lunes, 9 de marzo de 2026 a la(s) 3:03:51 pm UTC-3, Brandon Litherland

Mar 10

Mano, Brandon Litherland3

Mar 7

Unsymmetrical distribution of blades

You can achieve asymmetrical blade distribution, or non-uniform blade distribution using the More tab

unread,

Unsymmetrical distribution of blades

You can achieve asymmetrical blade distribution, or non-uniform blade distribution using the More tab

Mar 7

Julien, … Brandon Litherland6

Mar 6

Mesh Convergence on a Thin-Thick simulation

You're starting much too fine for your initial case to see any convergence. Start with something

unread,

Mesh Convergence on a Thin-Thick simulation

You're starting much too fine for your initial case to see any convergence. Start with something

Mar 6

João Vitor Ribeiro Centeno, … Brandon Litherland5

Mar 6

Help with OpenVSP Python API

While you have Python running, either in console or an IDE, run "pip install -r requirements-dev

unread,

Help with OpenVSP Python API

While you have Python running, either in console or an IDE, run "pip install -r requirements-dev

Mar 6

Carter Johnston, Rob McDonald4

Mar 6

Help needed with Issues with holes forming in mesh

That is a perfect application for using the area based density for the fuselage skin and then using

unread,

Help needed with Issues with holes forming in mesh

That is a perfect application for using the area based density for the fuselage skin and then using

Mar 6

王明坤, … Rob McDonald6

Mar 5

Duct propeller use

OK,thank you! 在2026年3月5日星期四 UTC+8 10:25:06<Rob McDonald> 写道： Thrust and CT distributions are

unread,

Duct propeller use

OK,thank you! 在2026年3月5日星期四 UTC+8 10:25:06<Rob McDonald> 写道： Thrust and CT distributions are

Mar 5

Thomas Pratt, Rob McDonald2

Mar 4

Control Surfaces in VSPaero

Are you using _ as a character in your Geom names and/or your Control Surface and/or Control Surface

unread,

Control Surfaces in VSPaero

Are you using _ as a character in your Geom names and/or your Control Surface and/or Control Surface

Mar 4

Mar 4

OpenVSP 3.48.2 Released

Yesterday's haste to fix the problem with 3.48 caused some other problems. These are caused by

unread,

OpenVSP 3.48.2 Released

Yesterday's haste to fix the problem with 3.48 caused some other problems. These are caused by

Mar 4

Erik Fougner Arnesen, … Rob McDonald7

Mar 4

VSPAERO data graphs

One possible stop gap solution could be adding a table, for the different parameters and their

unread,

VSPAERO data graphs

One possible stop gap solution could be adding a table, for the different parameters and their

Mar 4

Erik Fougner Arnesen

Mar 4

Issues simulating vehicle with and without fuselage (3.47.0)

Hi, I been working on fixing the issues I have with my vehicle. When I simulate with the full vehicle

unread,

Issues simulating vehicle with and without fuselage (3.47.0)

Hi, I been working on fixing the issues I have with my vehicle. When I simulate with the full vehicle

Mar 4

Search

Clear search

Close search

Google apps

Main menu