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Alex Woodruffe, … Brandon Litherland5

5:21 PM

VSPaero crashing upon launching solver

Yes, that model is the exact same as what I have on this computer. I've varied a lot of the

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VSPaero crashing upon launching solver

Yes, that model is the exact same as what I have on this computer. I've varied a lot of the

5:21 PM

Alex Woodruffe, Rob McDonald4

Apr 22

Issues meshing with spars in a varying taper wing

You should be able to make a polyspar that only extends part of the span of the wing. Rob On

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Issues meshing with spars in a varying taper wing

You should be able to make a polyspar that only extends part of the span of the wing. Rob On

Apr 22

Арсений Курганов

Apr 22

Calculating complex shapes in VSPAERO

Is VSPAERO capable of calculating the flow and Cl/Cd around a integral aerodynamic shape (example -

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Calculating complex shapes in VSPAERO

Is VSPAERO capable of calculating the flow and Cl/Cd around a integral aerodynamic shape (example -

Apr 22

Prahaas Kotni, Omer Kandemir2

Apr 22

Python API Control Surfaces in VSPAERO

I'm using something similar in my set up to the following script: first set your control surface

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Python API Control Surfaces in VSPAERO

I'm using something similar in my set up to the following script: first set your control surface

Apr 22

Zak Conte, … Zach Hazen3

Apr 21

VSPAero 3.46: Spanwise Lift Values

Near the root, I would always expect some messiness at the fuse-wing intersection where the cl

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VSPAero 3.46: Spanwise Lift Values

Near the root, I would always expect some messiness at the fuse-wing intersection where the cl

Apr 21

Carla Conejero Amarilla, … Rob McDonald4

Apr 21

Studying continuous transitions between hinge configurations (e.g., wing folding) – beyond variable presets?

The swept volume will only do linear motion at present. If you configure your Hinge to actually act

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Studying continuous transitions between hinge configurations (e.g., wing folding) – beyond variable presets?

The swept volume will only do linear motion at present. If you configure your Hinge to actually act

Apr 21

AGUS SUDARMAWAN, Brandon Litherland2

Apr 21

Ground Distance and angle of attack definition on Ground effect analysis

See this post https://groups.google.com/g/openvsp/c/i0qx0AvSK7k/m/0zqT0VhYDQAJ On Tuesday, April 14,

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Ground Distance and angle of attack definition on Ground effect analysis

See this post https://groups.google.com/g/openvsp/c/i0qx0AvSK7k/m/0zqT0VhYDQAJ On Tuesday, April 14,

Apr 21

Арсений Курганов

Apr 21

About abilities of VSPAero

Hello, Rob! Can VPSAero do a calculation of blended wing configuration in supersonic flow conditions

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About abilities of VSPAero

Hello, Rob! Can VPSAero do a calculation of blended wing configuration in supersonic flow conditions

Apr 21

M@, Mikel Catania2

Apr 19

Installing OpenVSP on Debian 13

Can you give more background? What steps did you follow to install the package? I suspect you were

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Installing OpenVSP on Debian 13

Can you give more background? What steps did you follow to install the package? I suspect you were

Apr 19

Syed Mujahid, … Adrian Fistoli4

Apr 19

Yes, I am getting this after the stall model is set to one in the Advanced tab. On Sun, Apr 19, 2026

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Yes, I am getting this after the stall model is set to one in the Advanced tab. On Sun, Apr 19, 2026

Apr 19

Apr 14

Torque sign convention in VSPAero

Dear community, I am wondering what is the sign convention for torque ("Moment") in the

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Torque sign convention in VSPAero

Dear community, I am wondering what is the sign convention for torque ("Moment") in the

Apr 14

AGUS SUDARMAWAN

Apr 14

Ground Distance and angle of attack definition on Ground effect analysis

Dear Rob McDonald, I want to perform wing in ground effect analysis by using VSPAero. I need your

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Ground Distance and angle of attack definition on Ground effect analysis

Dear Rob McDonald, I want to perform wing in ground effect analysis by using VSPAero. I need your

Apr 14

Apr 9

Aerodynamic Coefficient

Good afternoon, Quick question about the derivatives found from the Stability Analysis in VSPAERO,

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Aerodynamic Coefficient

Good afternoon, Quick question about the derivatives found from the Stability Analysis in VSPAERO,

Apr 9

Rajveer Bhangra

Apr 9

Removal of Vortex Lift, LE suction analogy and K-T correction

Hi, A quick query here, am I right to say there is currently no Vortex Lift / Leading Edge suction

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Removal of Vortex Lift, LE suction analogy and K-T correction

Hi, A quick query here, am I right to say there is currently no Vortex Lift / Leading Edge suction

Apr 9

Apr 9

How to modify Eta and XoC of a FEA_POLY_SPAR via API?

Good Afternoon, I'm working with the OpenVSP API to create FEA structures for a wing, and I am

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How to modify Eta and XoC of a FEA_POLY_SPAR via API?

Good Afternoon, I'm working with the OpenVSP API to create FEA structures for a wing, and I am

Apr 9

Simon Boudoux, Rob McDonald3

Apr 8

Difference between Parasite Drag and VSPAERO

Thanks for the answer ! So if I want to extract the aerodynamic coefficient is it better to choose

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Difference between Parasite Drag and VSPAERO

Thanks for the answer ! So if I want to extract the aerodynamic coefficient is it better to choose

Apr 8

Joep de Boer, Rob McDonald4

Apr 7

low numerical precision in CP_H

3.48.2 , I think it is as simple as changing %10.5f to %14.6e in VSP_SOLVER.C in all fprintf calls

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low numerical precision in CP_H

3.48.2 , I think it is as simple as changing %10.5f to %14.6e in VSP_SOLVER.C in all fprintf calls

Apr 7

Jasper, … Rob McDonald7

Apr 7

Trouble with Error: ambiguous flow-through subsurface detected

Dear Rob, I have upgraded to 3.49 and replicated the changes you have made so I could learn how you

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Trouble with Error: ambiguous flow-through subsurface detected

Dear Rob, I have upgraded to 3.49 and replicated the changes you have made so I could learn how you

Apr 7

Josh Goates, Rob McDonald5

Apr 6

Aero Load goes wonky near fuselage

Thank you for the guidance! I'll mess with it some more On Monday, April 6, 2026 at 2:09:54 PM

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Aero Load goes wonky near fuselage

Thank you for the guidance! I'll mess with it some more On Monday, April 6, 2026 at 2:09:54 PM

Apr 6

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

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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

Apr 3

unstable lateral and directional static stability

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

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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@

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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

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.

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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

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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

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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

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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-

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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.

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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

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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

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

Mar 15

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