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Iordanis Sapidis, Rob McDonald14

10:09 AM

OpenVSP 3.50.4 VSPAERO crashes with default wing

Yeah this version seems much more stable, thanks. On Wednesday, 3 June 2026 at 19:03:13 UTC+3 Rob

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OpenVSP 3.50.4 VSPAERO crashes with default wing

Yeah this version seems much more stable, thanks. On Wednesday, 3 June 2026 at 19:03:13 UTC+3 Rob

10:09 AM

Christian Hauschel, Rob McDonald6

Jun 2

VSPAERO TE Detection Fail

It is tolerance related, but not in an expected way. For some reason, you have TE closure turned ON

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VSPAERO TE Detection Fail

It is tolerance related, but not in an expected way. For some reason, you have TE closure turned ON

Jun 2

Billy Stewart, Rob McDonald5

Jun 2

Yes, all bodies must be individually watertight for CompGeom to work properly. The Stack component

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Yes, all bodies must be individually watertight for CompGeom to work properly. The Stack component

Jun 2

Shakil Salim, Rob McDonald2

Jun 2

Seeking Expert Advice: Verifying Bell-Shaped Lift Distribution (BSLD) in OpenVSP

Any wing planform can be twisted to match any desired lift distribution at one operating condition (

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Seeking Expert Advice: Verifying Bell-Shaped Lift Distribution (BSLD) in OpenVSP

Any wing planform can be twisted to match any desired lift distribution at one operating condition (

Jun 2

Adjei Ameyaw, Rob McDonald3

Jun 1

Group Modification

Thanks Rob On Monday, 1 June 2026 at 00:23:17 UTC-4 Rob McDonald wrote: From the API, if you want to

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Group Modification

Thanks Rob On Monday, 1 June 2026 at 00:23:17 UTC-4 Rob McDonald wrote: From the API, if you want to

Jun 1

Zak Conte, Rob McDonald4

Jun 1

OpenVSP 3.50.1 - 'Apply Loads' results in 0 DLOADS

Hello Rob, Thank you for the response, I have added a new issue report to the GitHub. Zak Conte On

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OpenVSP 3.50.1 - 'Apply Loads' results in 0 DLOADS

Hello Rob, Thank you for the response, I have added a new issue report to the GitHub. Zak Conte On

Jun 1

Dennis Spelt, Rob McDonald2

Jun 1

VSPAero coefficient definitions

The w subscript means that it is the inviscid contribution computed from a wake based formulation --

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VSPAero coefficient definitions

The w subscript means that it is the inviscid contribution computed from a wake based formulation --

Jun 1

Shakil Salim, Rob McDonald2

May 30

How is the data broken? What are you seeing vs. what are you expecting to see? Rob On Saturday, May

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How is the data broken? What are you seeing vs. what are you expecting to see? Rob On Saturday, May

May 30

Brandon Litherland

May 28

Re: OpenVSP to Digital DATCOM

You already posted this question in the appropriate thread. Don't duplicate posts. On Thursday,

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Re: OpenVSP to Digital DATCOM

You already posted this question in the appropriate thread. Don't duplicate posts. On Thursday,

May 28

Hiroshi Ohsato, … Miguel Aguirre3

May 28

the way to convert OpenVSP file (.vsp3 file) to DATCOM data

Hello, Is there any update on this topic? Best Miguel El domingo, 22 de julio de 2018 a la(s) 1:46:04

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the way to convert OpenVSP file (.vsp3 file) to DATCOM data

Hello, Is there any update on this topic? Best Miguel El domingo, 22 de julio de 2018 a la(s) 1:46:04

May 28

May 27

ERROR IN LOD FILE

Hello, I just realized that the LOD file extracts correctly the aero loads ONLY when the lifting

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ERROR IN LOD FILE

Hello, I just realized that the LOD file extracts correctly the aero loads ONLY when the lifting

May 27

May 23

VSPAero Wake Iterations

Hi, Apologies if already discussed in the group, can someone tell me the best practice rules of thumb

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VSPAero Wake Iterations

Hi, Apologies if already discussed in the group, can someone tell me the best practice rules of thumb

May 23

May 15

OpenVSP 3.50.3 Released

No features here, just a few bug fixes. One of them critical. Some *.vsp3 files written with 3.50.2

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OpenVSP 3.50.3 Released

No features here, just a few bug fixes. One of them critical. Some *.vsp3 files written with 3.50.2

May 15

May 14

Guidance on building models with vertical tails

Hi all, I am running a VSPAero analysis on a BWB with two vertical fins near the trailing edge of the

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Guidance on building models with vertical tails

Hi all, I am running a VSPAero analysis on a BWB with two vertical fins near the trailing edge of the

May 14

Ayush Jain, Rob McDonald3

May 14

Trimmed IGES and STEP Internal Structures Export

Thank you! On Tuesday, May 12, 2026 at 11:11:55 AM UTC-4 Rob McDonald wrote: Instead of calling

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Trimmed IGES and STEP Internal Structures Export

Thank you! On Tuesday, May 12, 2026 at 11:11:55 AM UTC-4 Rob McDonald wrote: Instead of calling

May 14

Patrick Hammer, Rob McDonald5

May 14

Download Archive

Nevermind, I need to hold it longer. I'm good now. Patrick On Thu, May 14, 2026 at 10:51 AM

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Download Archive

Nevermind, I need to hold it longer. I'm good now. Patrick On Thu, May 14, 2026 at 10:51 AM

May 14

Jannis Heinemann, Rob McDonald6

May 13

Strange second dataset

I re-ran both cases best of the first case with Re = 1.01199e7 and they were identical, so the

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Strange second dataset

I re-ran both cases best of the first case with Re = 1.01199e7 and they were identical, so the

May 13

Carla Conejero Amarilla

May 13

Thin-thick analysis

Hi everyone, I've been having trouble using the thin and thick surface analysis methods,

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Thin-thick analysis

Hi everyone, I've been having trouble using the thin and thick surface analysis methods,

May 13

Agustin Buffa, … Rob McDonald4

May 13

Build geometry from STL file

Wow, I had no memory of writing that. Thanks for bringing it back to the surface. Rob On Wednesday,

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Build geometry from STL file

Wow, I had no memory of writing that. Thanks for bringing it back to the surface. Rob On Wednesday,

May 13

Agustin Buffa, Rob McDonald2

May 12

Air intake model

You should check out the 'Integrated Flowpath Modeling' presentation from the 2025 Workshop

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Air intake model

You should check out the 'Integrated Flowpath Modeling' presentation from the 2025 Workshop

May 12

Edward Pickens, … Zach Hazen8

May 11

Replicating Karoo's non-planar geometry paper

I turned XZ symmetry on in the VSPAERO menu. I deleted the slice at Y = 0 (not sure if this matters).

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Replicating Karoo's non-planar geometry paper

I turned XZ symmetry on in the VSPAERO menu. I deleted the slice at Y = 0 (not sure if this matters).

May 11

Jaime García, Rob McDonald8

May 10

Help needed with Unsteady analysis: store dropped

Thanks, Rob! I've build the software with the change and it still doesn't work. It must be

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Help needed with Unsteady analysis: store dropped

Thanks, Rob! I've build the software with the change and it still doesn't work. It must be

May 10

catherine a, … Jannis Heinemann5

May 10

A320neo model — spikes in load distribution and unusually low drag polar (VSPAERO 3.45.4, Windows)

There seem to be several post regarding this topic with no solution so far: https://groups.google.com

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A320neo model — spikes in load distribution and unusually low drag polar (VSPAERO 3.45.4, Windows)

There seem to be several post regarding this topic with no solution so far: https://groups.google.com

May 10

May 9

OpenVSP 3.50.2 Released

Don't forget to register for the OpenVSP Workshop. August 4-6 in Daytona Beach Florida. Mostly

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OpenVSP 3.50.2 Released

Don't forget to register for the OpenVSP Workshop. August 4-6 in Daytona Beach Florida. Mostly

May 9

Andreas Chris, … Rob McDonald4

May 9

Issue Exporting IGES Structure – FEA Parts Not Recognized After ReadVSPFile

Thanks Rob, this method works perfectly. Appreciate the explanation and workaround until the next

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Issue Exporting IGES Structure – FEA Parts Not Recognized After ReadVSPFile

Thanks Rob, this method works perfectly. Appreciate the explanation and workaround until the next

May 9

Lin Livrin, Rob McDonald2

May 9

Different solutions to same setup on different versions of vspAERO

A ton of stuff changed in the solver during that time. The adjoint capability in the solver was

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Different solutions to same setup on different versions of vspAERO

A ton of stuff changed in the solver during that time. The adjoint capability in the solver was

May 9

Koaib Kaleem, Brandon Litherland3

May 8

degen_geom not importable after pip install -r requirements-dev.txt (OpenVSP 3.49.0, Python 3.11)

Great, Thank You On Friday, May 8, 2026 at 4:09:41 PM UTC+5 Brandon Litherland wrote: the degen_geom

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degen_geom not importable after pip install -r requirements-dev.txt (OpenVSP 3.49.0, Python 3.11)

Great, Thank You On Friday, May 8, 2026 at 4:09:41 PM UTC+5 Brandon Litherland wrote: the degen_geom

May 8

Demetrio Cucarella

May 7

Stability analisis

Hi everyone, i am currently working on the analisys of stability of a modified MQ9 Reaper. I have a

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Stability analisis

Hi everyone, i am currently working on the analisys of stability of a modified MQ9 Reaper. I have a

May 7

Avijeet Acharya, … Brandon Litherland4

May 7

Building Python API on Windows

Rob, Thanks for the detailed step-by-step instructions. It worked!! Brandon, I'll try it out.

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Building Python API on Windows

Rob, Thanks for the detailed step-by-step instructions. It worked!! Brandon, I'll try it out.

May 7

Jasper, … Rob McDonald5

May 7

Flaps curving instead of being straight when extended spanwise with fixed length

Dear Brandon and Rob, Thank you for the quick responses, that makes it clear. I have now adjusted the

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Flaps curving instead of being straight when extended spanwise with fixed length

Dear Brandon and Rob, Thank you for the quick responses, that makes it clear. I have now adjusted the

May 7

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