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Cindy Chen, Rob McDonald8

10:42 PM

spikes at wingtips in panel method solution

Also, to follow up, is there any way to get rid of the spikes in the load distribution completely? On

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spikes at wingtips in panel method solution

Also, to follow up, is there any way to get rid of the spikes in the load distribution completely? On

10:42 PM

7:59 PM

Adjoint driven optimization in VSPAERO

Recent versions of VSPAERO / OpenVSP support an adjoint driven optimization capability. While this

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Adjoint driven optimization in VSPAERO

Recent versions of VSPAERO / OpenVSP support an adjoint driven optimization capability. While this

7:59 PM

Toshio Otaguro2

6:21 PM

Very tiny fonts in the VSPAERO panel

I forgot to mention about the platform. These are OpenVSP-3.44.5-win64-Python3.11 and OpenVSP-3.47.0-

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Very tiny fonts in the VSPAERO panel

I forgot to mention about the platform. These are OpenVSP-3.44.5-win64-Python3.11 and OpenVSP-3.47.0-

6:21 PM

Syed Mujahid, … Rob McDonald6

2:49 PM

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,

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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,

2:49 PM

Cindy Chen, Rob McDonald3

9:49 AM

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

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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

9:49 AM

Mano, … Rob McDonald5

1:03 AM

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

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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

1:03 AM

T T, Rob McDonald4

1:02 AM

The Aerodynamic calculation results displayed in VSPAERO results manager revealed discontinuity of graph curve: lift coefficients Cl vs. wing span coordinate Y in vicinity of transition zone between flaps/ailerons and wing.

The air density is used as specified, but your units made it of magnitude 1e-9 -- which does not

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The Aerodynamic calculation results displayed in VSPAERO results manager revealed discontinuity of graph curve: lift coefficients Cl vs. wing span coordinate Y in vicinity of transition zone between flaps/ailerons and wing.

The air density is used as specified, but your units made it of magnitude 1e-9 -- which does not

1:02 AM

José Alfredo Rosas, … Rob McDonald12

12:59 AM

Difference between XSECSURF and XSEC?

You should start a new thread rather than posting on a 5 year old one. The XSec Parms are available

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Difference between XSECSURF and XSEC?

You should start a new thread rather than posting on a 5 year old one. The XSec Parms are available

12:59 AM

Jan 24

Not properly formulated questions on OpenVSP discussion group - please remove my 2 threads

Good morning, i sent Not properly formulated threads on OpenVSP discussion group - there were not

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Not properly formulated questions on OpenVSP discussion group - please remove my 2 threads

Good morning, i sent Not properly formulated threads on OpenVSP discussion group - there were not

Jan 24

Jan 24

he Aerodynamic calculation results displayed in VSPAERO results manager revealed discontinuity of graph curve: lift coefficients Cl vs. wing span coordinate Y in vicinity of transition zone between flaps/ailerons and wing.

Good morning everyone, i am especially interested in applying of aircraft wing's pressure

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he Aerodynamic calculation results displayed in VSPAERO results manager revealed discontinuity of graph curve: lift coefficients Cl vs. wing span coordinate Y in vicinity of transition zone between flaps/ailerons and wing.

Good morning everyone, i am especially interested in applying of aircraft wing's pressure

Jan 24

Jan 24

There is an option or setting in the VSPAERO to find Angle of Attack of the wing for corresponding equilibrium between estimated Total Lift Force Lz of analyzed wing with Weight Force of the wing?

There is an option or setting in the VSPAERO to find Angle of Attack of the wing for corresponding

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There is an option or setting in the VSPAERO to find Angle of Attack of the wing for corresponding equilibrium between estimated Total Lift Force Lz of analyzed wing with Weight Force of the wing?

There is an option or setting in the VSPAERO to find Angle of Attack of the wing for corresponding

Jan 24

Jan 24

Discontinuity of graph curve: lift coefficients Cl vs. wing span coordinate Y in vicinity of transition zone between flaps/ailerons and wing

I am especially interested in applying of aircraft wing's pressure distribution estimated in

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Discontinuity of graph curve: lift coefficients Cl vs. wing span coordinate Y in vicinity of transition zone between flaps/ailerons and wing

I am especially interested in applying of aircraft wing's pressure distribution estimated in

Jan 24

Mike Novikov, … Steven Zhu10

Jan 23

Adjoint Optimization

Steven, thank you for your answer. I use OpenVSP 3.46. I am starting VSPAero via cmd with vspaero_opt

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Adjoint Optimization

Steven, thank you for your answer. I use OpenVSP 3.46. I am starting VSPAero via cmd with vspaero_opt

Jan 23

Luís Filipe De Almeida E Silva, Rob McDonald3

Jan 22

Coefficients do not change in *.lod file when ref. area is changed

Thanks, Rob. I made a test using a simple rectangular wing and what you said seems to be correct.

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Coefficients do not change in *.lod file when ref. area is changed

Thanks, Rob. I made a test using a simple rectangular wing and what you said seems to be correct.

Jan 22

Jan 22

OpenVSP 3.47.0 Released

The gap since the last release (3.5mo) is a bit longer than usual (1-2mo). While some of that gap is

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OpenVSP 3.47.0 Released

The gap since the last release (3.5mo) is a bit longer than usual (1-2mo). While some of that gap is

Jan 22

Mike Novikov, … Rob McDonald5

Jan 13

High Cp value around trailing edge

Thank you, Rob. Noted! понедельник, 12 января 2026 г. в 21:55:26 UTC+4, Rob McDonald: Those high

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High Cp value around trailing edge

Thank you, Rob. Noted! понедельник, 12 января 2026 г. в 21:55:26 UTC+4, Rob McDonald: Those high

Jan 13

Miguel Aguirre, Rob McDonald2

Jan 12

VSP AERO - ERROR IN STEADY MODE

There is no way for the user to change the size of the perturbations. The perturbations were reduced

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VSP AERO - ERROR IN STEADY MODE

There is no way for the user to change the size of the perturbations. The perturbations were reduced

Jan 12

Violet Philip, Rob McDonald2

Jan 7

Did the CG end up where you would expect it to be? During the early phases of design (or when a model

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Did the CG end up where you would expect it to be? During the early phases of design (or when a model

Jan 7

Gabriel Kern, Rob McDonald4

Jan 7

Crash Using FEA Structures

No workaround known yet. Unfortunately, I'm having difficulty recreating this problem on my Mac,

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Crash Using FEA Structures

No workaround known yet. Unfortunately, I'm having difficulty recreating this problem on my Mac,

Jan 7

Lorenzo Naddei, … Rob McDonald6

Jan 6

CAN'T DEFLECT A SURFACE

Brandon, You are supposed to be able to assign surfaces to multiple groups -- it is a bug that you

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CAN'T DEFLECT A SURFACE

Brandon, You are supposed to be able to assign surfaces to multiple groups -- it is a bug that you

Jan 6

elephantwalker smith, … Rob McDonald11

Jan 5

The camber parameterization works with: NACA 4-Digit NACA 6-Series NACA 4-Digit Modified NACA 5-Digit

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The camber parameterization works with: NACA 4-Digit NACA 6-Series NACA 4-Digit Modified NACA 5-Digit

Jan 5

Tim Cuatt, Rob McDonald4

12/29/25

Bitmasking in VSPScript?

OK, thanks for the clarification. I guess AngelScript doesn't automatically interpret ints as

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Bitmasking in VSPScript?

OK, thanks for the clarification. I guess AngelScript doesn't automatically interpret ints as

12/29/25

danie...@gmail.com, Rob McDonald2

12/23/25

Difficulty getting prop model to work

You can't do propeller analysis with the 'Shown' Set. You must put the Prop into another

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Difficulty getting prop model to work

You can't do propeller analysis with the 'Shown' Set. You must put the Prop into another

12/23/25

12/18/25

VSP Python API RemoveControlSurfaceGroup

Hi everyone, I'm looking for a function to remove a ControlSurface group that I create by using

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VSP Python API RemoveControlSurfaceGroup

Hi everyone, I'm looking for a function to remove a ControlSurface group that I create by using

12/18/25

Matin Nafari, … Tad Chichester3

12/17/25

Loads of Individual Surfaces

Please do Rob. I have developed a suite of python apps for FAR 23 loads that depend on the pre-v3.45

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Loads of Individual Surfaces

Please do Rob. I have developed a suite of python apps for FAR 23 loads that depend on the pre-v3.45

12/17/25

José Roberto Clark Reis, … Rob McDonald4

12/16/25

Flow field vectors on wake/behind wing/Treftz plane

When you run VSPAERO from the GUI, if you scroll to the very top of the output console, it will echo

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Flow field vectors on wake/behind wing/Treftz plane

When you run VSPAERO from the GUI, if you scroll to the very top of the output console, it will echo

12/16/25

Limo, … Rob McDonald7

12/16/25

VSP_aero Supersonic Secondary Development

To use supersonic at this time, all components must be in the Thin set. Only very early work has been

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VSP_aero Supersonic Secondary Development

To use supersonic at this time, all components must be in the Thin set. Only very early work has been

12/16/25

Lorenzo Naddei, Rob McDonald5

12/16/25

VSPAERO VLM+PANEL ERROR

Plane and eigenvalues fixed, thank you for the help and the tips!! Lorenzo Il giorno lunedì 15

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VSPAERO VLM+PANEL ERROR

Plane and eigenvalues fixed, thank you for the help and the tips!! Lorenzo Il giorno lunedì 15

12/16/25

Christopher Smith, … Rob McDonald5

12/15/25

Export Actuator Disc Surface as Ngons?

Glad to hear it. I don't think the 'Convert to NGons' action is available through the API

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Export Actuator Disc Surface as Ngons?

Glad to hear it. I don't think the 'Convert to NGons' action is available through the API

12/15/25

Matin Nafari, Rob McDonald6

12/14/25

OpenVSP API problem in Actuator Disk in new version 3.46.0

That is interesting. You should not need the 'DegenGeom' -- but you should need the

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OpenVSP API problem in Actuator Disk in new version 3.46.0

That is interesting. You should not need the 'DegenGeom' -- but you should need the

12/14/25

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