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Klarisse Ng, … Rob McDonald7

Nov 25

VSPAero Output Variable Query

Yes, the wake integration should still work in the case of an actuator disk in front of the wing. Rob

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VSPAero Output Variable Query

Yes, the wake integration should still work in the case of an actuator disk in front of the wing. Rob

Nov 25

Jones, … Brian Davis4

Nov 25

Wave Drag vs Parasitic Drag Tool

Hi Rob, Re: "The parasite drag tool is fine for supersonic speeds. I'm not sure why someone

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Wave Drag vs Parasitic Drag Tool

Hi Rob, Re: "The parasite drag tool is fine for supersonic speeds. I'm not sure why someone

Nov 25

Michael Kang, … Brandon Litherland7

Nov 25

vspscript analysis result issue

Hello, sorry for late reply.. Thank you Brandon and Rob. I checked the settings that I made on

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vspscript analysis result issue

Hello, sorry for late reply.. Thank you Brandon and Rob. I checked the settings that I made on

Nov 25

Klarisse Ng, … Zach Hazen3

Nov 24

VSPAero Results for Varying Aspect Ratios

Just keep in mind for studying induced drag with a swept wing you are going to have varying span

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VSPAero Results for Varying Aspect Ratios

Just keep in mind for studying induced drag with a swept wing you are going to have varying span

Nov 24

Nathan Collins, … Brandon Litherland8

Nov 24

Python API Questions

It's been a minute since I've had to mess with these values but for the python API, I think

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Python API Questions

It's been a minute since I've had to mess with these values but for the python API, I think

Nov 24

Carlos Rodriguez, … lsol...@gmail.com5

Nov 22

OpenVSP on Fedora 42 / Arch Linux and Wayland

Hello again, I have finally installed 3.46.0 version too. Initially I tried to compile from source

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OpenVSP on Fedora 42 / Arch Linux and Wayland

Hello again, I have finally installed 3.46.0 version too. Initially I tried to compile from source

Nov 22

Nov 21

OpenVSP/VSPAero Slat Modeling

Hello all, I am an undergraduate senior and have modeled an MD-11 for... reasons y'all can

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OpenVSP/VSPAero Slat Modeling

Hello all, I am an undergraduate senior and have modeled an MD-11 for... reasons y'all can

Nov 21

Brandon Litherland

Nov 20

OpenVSP Ground School Site Move

Good afternoon, everyone. I wanted to pass along that I was finally able to finish rebuilding the

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OpenVSP Ground School Site Move

Good afternoon, everyone. I wanted to pass along that I was finally able to finish rebuilding the

Nov 20

Leonardo Ungureanu, Rob McDonald7

Nov 18

Python API, problems on Linux (works on Windows)

Thank you very much. I'll reinstall it. To install the API on Linux, is the process equivalent to

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Python API, problems on Linux (works on Windows)

Thank you very much. I'll reinstall it. To install the API on Linux, is the process equivalent to

Nov 18

Nov 18

"VSPAEROComputeGeometry" v3.46.0 SetIntAnalysisInput does not translate ThinGeomSet and GeomSet values!

Hi everyone, I'm creating a python class to run VSPAero analysis. The class has the following

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"VSPAEROComputeGeometry" v3.46.0 SetIntAnalysisInput does not translate ThinGeomSet and GeomSet values!

Hi everyone, I'm creating a python class to run VSPAero analysis. The class has the following

Nov 18

Violet Philip, Rob McDonald3

Nov 17

SHARP SPIKES AT THE WING (B767-200ER)

Thanks Rob for the reply. Violet On Tue, 18 Nov 2025, 01:31 Rob McDonald, <rob.a.mcdonald@gmail.

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SHARP SPIKES AT THE WING (B767-200ER)

Thanks Rob for the reply. Violet On Tue, 18 Nov 2025, 01:31 Rob McDonald, <rob.a.mcdonald@gmail.

Nov 17

Valentin Le Bailly, Rob McDonald2

Nov 17

Trimmed surfaces export for CFD recommendations

If you want to use the STL file, I suggest you run CompGeom before exporting the STL file. That will

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Trimmed surfaces export for CFD recommendations

If you want to use the STL file, I suggest you run CompGeom before exporting the STL file. That will

Nov 17

Brian Davis, … Rob McDonald6

Nov 15

VSPAERO Issues with wing-body in 3.45.X

My recommendation is to use the thick representation for the body and fairing, and thin for the wing.

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VSPAERO Issues with wing-body in 3.45.X

My recommendation is to use the thick representation for the body and fairing, and thin for the wing.

Nov 15

Diego Elvira, Brandon Litherland6

Nov 14

VSPAERO CDi convergence issues

Thanks for the advice. I'll look into these suggestions as soon as I'm able. El El jue, 13

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VSPAERO CDi convergence issues

Thanks for the advice. I'll look into these suggestions as soon as I'm able. El El jue, 13

Nov 14

danie...@gmail.com, … Rob McDonald5

Nov 14

Bias OpenVSP Results

Sounds good, thanks guys! On Friday, November 14, 2025 at 1:38:44 PM UTC-5 Rob McDonald wrote: No.

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Bias OpenVSP Results

Sounds good, thanks guys! On Friday, November 14, 2025 at 1:38:44 PM UTC-5 Rob McDonald wrote: No.

Nov 14

Nov 13

Xnp shifts back by 17% cref in newer versions of OpenVSP

Starting with OpenVSP version 3.45.0 the Xnp result after a steady stability analysis shifts rearward

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Xnp shifts back by 17% cref in newer versions of OpenVSP

Starting with OpenVSP version 3.45.0 the Xnp result after a steady stability analysis shifts rearward

Nov 13

Juan Lavirgen, Rob McDonald2

Nov 12

VSPAero acronyms

Search this group, it has been explained numerous times. Rob On Wednesday, November 12, 2025 at 11:29

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VSPAero acronyms

Search this group, it has been explained numerous times. Rob On Wednesday, November 12, 2025 at 11:29

Nov 12

Mike Kelly, Rob McDonald5

Nov 12

Problems with flaps using thick analysis

It will account for camber, but not thickness. You can see the camber in the thin-surface mesh of the

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Problems with flaps using thick analysis

It will account for camber, but not thickness. You can see the camber in the thin-surface mesh of the

Nov 12

Cindy Chen, Rob McDonald4

Nov 12

User-defined step size for stability derivative calculation

No, you'll need to use 3.46.0 to use it. Rob On Wed, Nov 12, 2025 at 9:20 AM Cindy Chen <chen.

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User-defined step size for stability derivative calculation

No, you'll need to use 3.46.0 to use it. Rob On Wed, Nov 12, 2025 at 9:20 AM Cindy Chen <chen.

Nov 12

Joshua Bigland, Rob McDonald2

Nov 12

VSP aero crashing

You have all your components in both the Thick and Thin Sets. One is set to Shown (which has

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VSP aero crashing

You have all your components in both the Thick and Thin Sets. One is set to Shown (which has

Nov 12

Nov 9

Issue with FEA mm units and OpenVSP stability

Hello All, I am facing a weird issue with structures module of OpenVSP. I have generated a simple

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Issue with FEA mm units and OpenVSP stability

Hello All, I am facing a weird issue with structures module of OpenVSP. I have generated a simple

Nov 9

Tijs van Stijn, Rob McDonald3

Nov 4

Weird results from VSPAERO

Oh thank you! I must have missed that somehow. Thank you for your assistance! Op dinsdag 4 november

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Weird results from VSPAERO

Oh thank you! I must have missed that somehow. Thank you for your assistance! Op dinsdag 4 november

Nov 4

Nov 4

P Stability analysis

Hi! I've run the P stability analysis for my aircraft. It produces different results for Clp,

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P Stability analysis

Hi! I've run the P stability analysis for my aircraft. It produces different results for Clp,

Nov 4

Maryam Alkhateri, Brandon Litherland11

Nov 3

Different Propeller RPMs Effect

I think that watching Rob's VSPAERO walkthrough will solve a lot of your issues. https://www.

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Different Propeller RPMs Effect

I think that watching Rob's VSPAERO walkthrough will solve a lot of your issues. https://www.

Nov 3

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

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