Groups

OpenVSP

1–30 of 3291

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

Federico Feraiorni, … Brandon Litherland16

Feb 21

Help STL model analysis

I found a few things that are likely causing problems. Making some changes should help. The VSPAERO

unread,

Help STL model analysis

I found a few things that are likely causing problems. Making some changes should help. The VSPAERO

Feb 21

Steven Zhu, Rob McDonald6

Feb 19

Issue with VSPAERO via CLI: "Could not load Degen Geometry" error

On Thursday, February 19, 2026 at 6:15:25 PM UTC-8 zyx20...@gmail.com wrote: Thank you for the

unread,

Issue with VSPAERO via CLI: "Could not load Degen Geometry" error

On Thursday, February 19, 2026 at 6:15:25 PM UTC-8 zyx20...@gmail.com wrote: Thank you for the

Feb 19

Guy Mullins, Rob McDonald2

Feb 19

Automation of VSPaero

It depends on how complex an automation framework you are working in. If you want to use OpenVSP /

unread,

Automation of VSPaero

It depends on how complex an automation framework you are working in. If you want to use OpenVSP /

Feb 19

Nick Schneider, Rob McDonald3

Feb 18

Dihedral changes airfoil thickness

Thanks Rob, that did the trick! On Wednesday, 18 February 2026 at 18:47:08 UTC+1 Rob McDonald wrote:

unread,

Dihedral changes airfoil thickness

Thanks Rob, that did the trick! On Wednesday, 18 February 2026 at 18:47:08 UTC+1 Rob McDonald wrote:

Feb 18

Julien, Rob McDonald2

Feb 16

Design Variables Constraints in Adjoint Optimizer

At present, there is no way to constrain design variables. Right now, the embedded optimizer is

unread,

Design Variables Constraints in Adjoint Optimizer

At present, there is no way to constrain design variables. Right now, the embedded optimizer is

Feb 16

Carla Conejero Amarilla, Rob McDonald3

Feb 14

Stability derivatives

Thanks you Rob for the help. El viernes, 13 de febrero de 2026 a las 22:55:11 UTC+1, Rob McDonald

unread,

Stability derivatives

Thanks you Rob for the help. El viernes, 13 de febrero de 2026 a las 22:55:11 UTC+1, Rob McDonald

Feb 14

Carl Johnson, Rob McDonald4

Feb 13

Potential bug with VSPAERO stability derivatives for supersonic solutions

I passed your report onto the VSPAERO developer. This is a bug. He realized the problem a while ago,

unread,

Potential bug with VSPAERO stability derivatives for supersonic solutions

I passed your report onto the VSPAERO developer. This is a bug. He realized the problem a while ago,

Feb 13

Federico Feraiorni, Brandon Litherland7

Feb 12

Info custom VSPAERO settings

Brandon, thank you very much for your attention. For anyone having this exact question, I also

unread,

Info custom VSPAERO settings

Brandon, thank you very much for your attention. For anyone having this exact question, I also

Feb 12

Calioth, Brandon Litherland6

Feb 12

Help with mismatch in CeRAS aircraft model.

Thanks very much! On Thursday, February 12, 2026 at 1:21:43 PM UTC Brandon Litherland wrote: CD0 in

unread,

Help with mismatch in CeRAS aircraft model.

Thanks very much! On Thursday, February 12, 2026 at 1:21:43 PM UTC Brandon Litherland wrote: CD0 in

Feb 12

Valentin Le Bailly, Rob McDonald2

Feb 11

Spanwise definition control surfaces Python API

3.26.1 is from January of 2022 -- four years old. OpenVSP development is very fast considering the

unread,

Spanwise definition control surfaces Python API

3.26.1 is from January of 2022 -- four years old. OpenVSP development is very fast considering the

Feb 11

Julien, Brandon Litherland6

Feb 11

module 'openvsp' has no attribute 'VORTEX_LATTICE'

Thanks for the answer! On Tuesday, February 10, 2026 at 6:57:35 PM UTC+1 Brandon Litherland wrote: If

unread,

module 'openvsp' has no attribute 'VORTEX_LATTICE'

Thanks for the answer! On Tuesday, February 10, 2026 at 6:57:35 PM UTC+1 Brandon Litherland wrote: If

Feb 11

Federico Feraiorni, Brandon Litherland3

Feb 10

Info Tessellation

Hi Brandon, Thank you for your response. I am conducting the analysis under the same flow conditions

unread,

Info Tessellation

Hi Brandon, Thank you for your response. I am conducting the analysis under the same flow conditions

Feb 10

Cindy Chen, Rob McDonald11

Feb 10

spikes at wingtips in panel method solution

Thank you for pointing out the blunt trailing edges, Rob. I sharpened them for all sections and am

unread,

spikes at wingtips in panel method solution

Thank you for pointing out the blunt trailing edges, Rob. I sharpened them for all sections and am

Feb 10

Rob McDonald, Mike Novikov6

Feb 8

Adjoint driven optimization in VSPAERO

Thank you for your time, Rob and Dave! Sorry for bothering you(( пятница, 6 февраля 2026 г. в 22:20:

unread,

Adjoint driven optimization in VSPAERO

Thank you for your time, Rob and Dave! Sorry for bothering you(( пятница, 6 февраля 2026 г. в 22:20:

Feb 8

Feb 8

Help with data mismatch

Hello everyone, I am currently working on a project that involves reproducing the CeRAS CSR-01 Model

unread,

Help with data mismatch

Hello everyone, I am currently working on a project that involves reproducing the CeRAS CSR-01 Model

Feb 8

Zhenhao Li, … Brandon Litherland4

Feb 6

Help! Meshing for Wing&Fuselage and the interpretation of VSPAero result.

The quality of the results will depend on what you need. If you judge quality by the level of

unread,

Help! Meshing for Wing&Fuselage and the interpretation of VSPAero result.

The quality of the results will depend on what you need. If you judge quality by the level of

Feb 6

Simon Boudoux, Rob McDonald2

Feb 6

API Python - Steady Analysis - Aerodynamic Coefficient

What aerodynamic coefficient do you want -- that is not the cl and cd? Perhaps you mean pressure

unread,

API Python - Steady Analysis - Aerodynamic Coefficient

What aerodynamic coefficient do you want -- that is not the cl and cd? Perhaps you mean pressure

Feb 6

Etienne Behar, Rob McDonald2

Feb 6

Airfoil - LE vs TE trimming - Effect of camber

I would have to dig into this behavior a bit more to figure out exactly what is going on. OpenVSP

unread,

Airfoil - LE vs TE trimming - Effect of camber

I would have to dig into this behavior a bit more to figure out exactly what is going on. OpenVSP

Feb 6

Feb 4

Wave Drag Analysis by OpenVSP 3.47.0

Hello everyone, In wave drag analysis, I previously used OpenVSP 3.45.0 (win64) successfully for

unread,

Wave Drag Analysis by OpenVSP 3.47.0

Hello everyone, In wave drag analysis, I previously used OpenVSP 3.45.0 (win64) successfully for

Feb 4

Marco Palermo, Tad Chichester2

Feb 3

General question: .lod data structure OpenVSP 3.47

Marco, I agree wholeheartedly with your comments regarding the usefulness of the data contained in

unread,

General question: .lod data structure OpenVSP 3.47

Marco, I agree wholeheartedly with your comments regarding the usefulness of the data contained in

Feb 3

Rob McDonald, … Brandon Litherland3

Feb 3

OpenVSP 3.47.0 Released

This question should be a new post. Please start a new thread. On Tuesday, February 3, 2026 at 1:03:

unread,

OpenVSP 3.47.0 Released

This question should be a new post. Please start a new thread. On Tuesday, February 3, 2026 at 1:03:

Feb 3

Matt A, Miguel Aguirre2

Feb 2

X,Y,Z velocity data of downwash distribution

Hello, This is the procedure I use to achieve that: GET VELOCITY AT SPECIFIED POINTS 1) Open VSP case

unread,

X,Y,Z velocity data of downwash distribution

Hello, This is the procedure I use to achieve that: GET VELOCITY AT SPECIFIED POINTS 1) Open VSP case

Feb 2

Violet Philip, Rob McDonald3

Jan 30

Control derivative interpretation

Thank you, Rob for the reply. Violet On Sat, 31 Jan 2026, 01:31 Rob McDonald, <rob.a.mcdonald@

unread,

Control derivative interpretation

Thank you, Rob for the reply. Violet On Sat, 31 Jan 2026, 01:31 Rob McDonald, <rob.a.mcdonald@

Jan 30

Jules Galzin, … Rob McDonald3

Jan 30

Applying different densities to a fuselage

The MassProp calculation in OpenVSP does not use SubSurfaces. However, version 3.45.2 will report

unread,

Applying different densities to a fuselage

The MassProp calculation in OpenVSP does not use SubSurfaces. However, version 3.45.2 will report

Jan 30

Toshio Otaguro, Rob McDonald13

Jan 30

Very tiny fonts in the VSPAERO panel

Many thanks, Rob. I hope you sleep well. 2026年1月30日金曜日 11:35:52 UTC+9 Rob McDonald: OK, I'll try

unread,

Very tiny fonts in the VSPAERO panel

Many thanks, Rob. I hope you sleep well. 2026年1月30日金曜日 11:35:52 UTC+9 Rob McDonald: OK, I'll try

Jan 30

nate carr, … Brandon Litherland4

Jan 29

Changing wing span in .vsp3 file

Hi Rob and Brandon, Thanks, this helps a lot. I'll stop editing the .vsp3 directly and use the .

unread,

Changing wing span in .vsp3 file

Hi Rob and Brandon, Thanks, this helps a lot. I'll stop editing the .vsp3 directly and use the .

Jan 29

Simon Boudoux, Rob McDonald2

Jan 28

Aerodynamic Derivatives wrt to u,v,w

This is normal flight dynamics process. Assuming that you would decompose V_inf into (u,v,w), then

unread,

Aerodynamic Derivatives wrt to u,v,w

This is normal flight dynamics process. Assuming that you would decompose V_inf into (u,v,w), then

Jan 28

Syed Mujahid, … Rob McDonald6

Jan 27

How to make a fuselage surface smooth

I would attempt to model this fuselage with four cross sections. One at the nose, one at the tail,

unread,

How to make a fuselage surface smooth

I would attempt to model this fuselage with four cross sections. One at the nose, one at the tail,

Jan 27

Cindy Chen, Rob McDonald3

Jan 27

Analyzing a blended wing-body with both VLM and panel method

The screenshot I showed was just for illustrative purposes. Attached is the actual geometry I want to

unread,

Analyzing a blended wing-body with both VLM and panel method

The screenshot I showed was just for illustrative purposes. Attached is the actual geometry I want to

Jan 27

Mano, … Rob McDonald5

Jan 27

Design of toroidal propeller

The center of that is a body of revolution, the blades are not. If you want to model the hub with a

unread,

Design of toroidal propeller

The center of that is a body of revolution, the blades are not. If you want to model the hub with a

Jan 27

Search

Clear search

Close search

Google apps

Main menu