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Anuj Kumar
,
Brandon Litherland
3
Sep 29
Errors while obtaining aero coefficients with control suface deflection on OpenVSP 3.45.4
Hi Brandon, Thank you for the response. I was able to resolve this issue on my end. I'm not sure
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Errors while obtaining aero coefficients with control suface deflection on OpenVSP 3.45.4
Hi Brandon, Thank you for the response. I was able to resolve this issue on my end. I'm not sure
Sep 29
Kartikey Karnwal
, …
Rob McDonald
5
Sep 29
Difficulty in Obtaining Aerodynamic Coefficients for Lenticular Geometry
Dear Sir, Thank you very much for your prompt response. I will certainly review all the parameters
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Difficulty in Obtaining Aerodynamic Coefficients for Lenticular Geometry
Dear Sir, Thank you very much for your prompt response. I will certainly review all the parameters
Sep 29
Rexus Gan
,
Rob McDonald
2
Sep 28
Exporting Cross section Using Xsec(.hrm) to Freecad
*.dat is not a file format, it is a generic extension used by many programs to mean many different
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Exporting Cross section Using Xsec(.hrm) to Freecad
*.dat is not a file format, it is a generic extension used by many programs to mean many different
Sep 28
Alex Maxwell
,
Mike Vivaldi
3
Sep 27
VSPAero crashes upon clicking 'Prepare Solver' or 'Launch Solver' v3.45.0
A couple of other issues. It seems rotating the inlets -90 degrees results in a crash even with just
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VSPAero crashes upon clicking 'Prepare Solver' or 'Launch Solver' v3.45.0
A couple of other issues. It seems rotating the inlets -90 degrees results in a crash even with just
Sep 27
Mike Vivaldi
, …
Brandon Litherland
19
Sep 27
Fuselage model results in no VSPaero results
Here is the image of Cd and Cl values for the symmetry case On Saturday, September 27, 2025 at 7:11:
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Fuselage model results in no VSPaero results
Here is the image of Cd and Cl values for the symmetry case On Saturday, September 27, 2025 at 7:11:
Sep 27
Tim Swait
Sep 27
Winglet optimisation
Not a question, but hopefully this will be interesting to some of you. I've been using OpenVSP
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Winglet optimisation
Not a question, but hopefully this will be interesting to some of you. I've been using OpenVSP
Sep 27
Zachary Law
,
Rob McDonald
5
Sep 27
FEA Property Functionality in OpenVSP
Thank you for clarifying how the FEA Properties were working behind the scenes, I couldn't find
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FEA Property Functionality in OpenVSP
Thank you for clarifying how the FEA Properties were working behind the scenes, I couldn't find
Sep 27
Séraphin Remy
, …
Rob McDonald
14
Sep 26
Stall modelling using 2DClmax
Clo2D has nothing to do with the stall model on/off and the Clmax input. The Clo2D should have an
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Stall modelling using 2DClmax
Clo2D has nothing to do with the stall model on/off and the Clmax input. The Clo2D should have an
Sep 26
Mike Vivaldi
,
Rob McDonald
2
Sep 24
Documentation regarding VSPAERO Convergence Factors variables
VSPAERO has multiple convergence loops. In a normal solve, there are two main loops. There is a
unread,
Documentation regarding VSPAERO Convergence Factors variables
VSPAERO has multiple convergence loops. In a normal solve, there are two main loops. There is a
Sep 24
Brandon Litherland
,
skyc...@gmail.com
3
Sep 23
OpenVSP Ground School is Moving!
Awesome, thanks Brandon! On Monday, September 22, 2025 at 1:40:18 PM UTC-7 Brandon Litherland wrote:
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OpenVSP Ground School is Moving!
Awesome, thanks Brandon! On Monday, September 22, 2025 at 1:40:18 PM UTC-7 Brandon Litherland wrote:
Sep 23
skyc...@gmail.com
Sep 23
VSPAero .lod results with new thin/thick method
Hello, I'm missing the component summation portion of the .lod file when running analysis in
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VSPAero .lod results with new thin/thick method
Hello, I'm missing the component summation portion of the .lod file when running analysis in
Sep 23
مريم راشد
,
Brandon Litherland
2
Sep 19
Question about AeroVSP Analysis with Rotating Propellers
VSPAERO does not compute the "steady" stability derivatives in unsteady mode. The steady
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Question about AeroVSP Analysis with Rotating Propellers
VSPAERO does not compute the "steady" stability derivatives in unsteady mode. The steady
Sep 19
Abdullah Mejbil
,
Rob McDonald
3
Sep 18
VSPAERO Input Files and Aerostructural Analysis
Thank you for the explanation Rob! If anyone knows how the loads are transferred from the VLM
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VSPAERO Input Files and Aerostructural Analysis
Thank you for the explanation Rob! If anyone knows how the loads are transferred from the VLM
Sep 18
p lei
Sep 17
NGon mesh has non manifold edges so vspaero cannot handle it
I made a glider aircraft plan in openvsp 3.45.4. When i wanted to do some analysis with vspaero, I
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NGon mesh has non manifold edges so vspaero cannot handle it
I made a glider aircraft plan in openvsp 3.45.4. When i wanted to do some analysis with vspaero, I
Sep 17
湯勛云
,
Brandon Litherland
2
Sep 17
[OpenVSP] Propeller prediction and experimental testing
We see this fairly often and not just in the Google Group. I'll credit XKCD with the image below
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[OpenVSP] Propeller prediction and experimental testing
We see this fairly often and not just in the Google Group. I'll credit XKCD with the image below
Sep 17
Filippo Pattacini
,
Rob McDonald
3
Sep 17
Issue with full-chord rudder
Thank you for your advice. I tried to follow your suggestion, but I am still not fully sure how to
unread,
Issue with full-chord rudder
Thank you for your advice. I tried to follow your suggestion, but I am still not fully sure how to
Sep 17
Mike Kelly
,
Rob McDonald
4
Sep 17
Landing Gear Rim Size
Thanks for that additional information. That may help me track down the issue... Rob On Tuesday,
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Landing Gear Rim Size
Thanks for that additional information. That may help me track down the issue... Rob On Tuesday,
Sep 17
Vivian Kaspar
, …
Omer Kandemir
4
Sep 15
Changing Airfoil shape parameters
Hi Vivian, I think you need to call "vsp.Update()" after changing XSecShape as follows:
unread,
Changing Airfoil shape parameters
Hi Vivian, I think you need to call "vsp.Update()" after changing XSecShape as follows:
Sep 15
Mike Vivaldi
,
Rob McDonald
2
Sep 15
VSPAero Stall model on wing with multiple airfoils
I would probably look at the load distribution to see where the wing stalls first and then use the
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VSPAero Stall model on wing with multiple airfoils
I would probably look at the load distribution to see where the wing stalls first and then use the
Sep 15
Mike Vivaldi
,
Rob McDonald
4
Sep 15
Discontinuity handling in fit model.
OK, in that case, LowStr is being driven to zero. You can set it to something reasonable and then
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Discontinuity handling in fit model.
OK, in that case, LowStr is being driven to zero. You can set it to something reasonable and then
Sep 15
Peter Hauschild
, …
skyc...@gmail.com
23
Sep 10
Creating FEM models for CalculiX
This is reopening a very old thread, but at the beginning of this thread I tried to show a simple
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Creating FEM models for CalculiX
This is reopening a very old thread, but at the beginning of this thread I tried to show a simple
Sep 10
danie...@gmail.com
,
Rob McDonald
2
Sep 9
How to hide Centerline Plane
That is a representation of the VSPAERO slice plane. It will go away if you close the VSPAERO GUI. Or
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How to hide Centerline Plane
That is a representation of the VSPAERO slice plane. It will go away if you close the VSPAERO GUI. Or
Sep 9
Steven Zhu
, …
Brandon Litherland
7
Sep 9
VLM Solver Stuck on Wake Grid Merging with Control Surface
Weird. Reducing the num U and W down to 21 lets it run fine. I tried again and got it working by only
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VLM Solver Stuck on Wake Grid Merging with Control Surface
Weird. Reducing the num U and W down to 21 lets it run fine. I tried again and got it working by only
Sep 9
Mike Vivaldi
, …
Brandon Litherland
5
Sep 9
Fit Model question
The 2025 OpenVSP Workshop has a great presentation by Rob covering surface representation in detail.
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Fit Model question
The 2025 OpenVSP Workshop has a great presentation by Rob covering surface representation in detail.
Sep 9
Kilian
, …
Rob McDonald
5
Sep 8
Completely different results for CMy after switching to 3.45.4
Can you provide a simplified test case that exhibits the change you're seeing? Rob On Monday,
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Completely different results for CMy after switching to 3.45.4
Can you provide a simplified test case that exhibits the change you're seeing? Rob On Monday,
Sep 8
Mike Vivaldi
,
Rob McDonald
14
Sep 6
stl face deletion
If you import a Xsec (*.hrm) or Plot3D (*.p3d) file as wireframe (not as a mesh), then OpenVSP will
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stl face deletion
If you import a Xsec (*.hrm) or Plot3D (*.p3d) file as wireframe (not as a mesh), then OpenVSP will
Sep 6
Mike Vivaldi
,
Rob McDonald
2
Sep 6
Result interpretation
There are a bunch of related coefficients with different subscripts. This has changed somewhat from
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Result interpretation
There are a bunch of related coefficients with different subscripts. This has changed somewhat from
Sep 6
Kilian
,
Mikel Catania
3
Sep 5
Aerodynamic Coefficients per Component
Thanks Mikel, I guess you are right. However, I only have VortexSheet 1 to 6 although my model should
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Aerodynamic Coefficients per Component
Thanks Mikel, I guess you are right. However, I only have VortexSheet 1 to 6 although my model should
Sep 5
deenri...@gmail.com
,
Rob McDonald
2
Sep 4
Recovering Crashing Model
Send me the model if you can. Rob On Thursday, September 4, 2025 at 8:14:55 AM UTC-7 deenri...@gmail.
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Recovering Crashing Model
Send me the model if you can. Rob On Thursday, September 4, 2025 at 8:14:55 AM UTC-7 deenri...@gmail.
Sep 4
Mike Vivaldi
,
Rob McDonald
5
Sep 3
convert stl crash
Hi Rob, The documentation I have for the Boeing 707 includes lots of points which I process using
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convert stl crash
Hi Rob, The documentation I have for the Boeing 707 includes lots of points which I process using
Sep 3