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Mike Vivaldi, … Brandon Litherland8

12:29 AM

Fuselage model results in no VSPaero results

Hi Brandon, I attempted your suggestion leaving everything the same except fuselage w = 41and the

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Fuselage model results in no VSPaero results

Hi Brandon, I attempted your suggestion leaving everything the same except fuselage w = 41and the

12:29 AM

مريم راشد, Brandon Litherland2

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 McDonald3

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

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 Litherland2

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 McDonald3

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

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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 McDonald4

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

Brandon Litherland

Sep 15

OpenVSP Ground School is Moving!

Hi, everyone! I'd like you all to be aware early that the OpenVSP Ground school will be moving

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OpenVSP Ground School is Moving!

Hi, everyone! I'd like you all to be aware early that the OpenVSP Ground school will be moving

Sep 15

Vivian Kaspar, … Omer Kandemir4

Sep 15

Changing Airfoil shape parameters

Hi Vivian, I think you need to call "vsp.Update()" after changing XSecShape as follows:

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Changing Airfoil shape parameters

Hi Vivian, I think you need to call "vsp.Update()" after changing XSecShape as follows:

Sep 15

Mike Vivaldi, Rob McDonald2

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 McDonald4

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.com23

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

Sep 10

Stall modelling using 2DClmax

Hi everyone, Is it possible to have more information about the stall model with the 2D Clmax please ?

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Stall modelling using 2DClmax

Hi everyone, Is it possible to have more information about the stall model with the 2D Clmax please ?

Sep 10

danie...@gmail.com, Rob McDonald2

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 Litherland7

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 Litherland5

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 McDonald5

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 McDonald14

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 McDonald2

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 Catania3

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 McDonald2

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 McDonald5

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

Shubham Tamboli, Tim Swait3

Sep 1

Elliptical planform in Openvsp

Thanks for the help Tim !! On Monday, September 1, 2025 at 6:52:28 PM UTC+5:30 Tim Swait wrote:

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Elliptical planform in Openvsp

Thanks for the help Tim !! On Monday, September 1, 2025 at 6:52:28 PM UTC+5:30 Tim Swait wrote:

Sep 1

Srinidhi NS, Rob McDonald3

Sep 1

Regarding Moment coefficients in .polar file

Hi Rob, Thanks for your prompt response. Regards, Srinidhi On Friday, August 29, 2025 at 11:12:14 PM

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Regarding Moment coefficients in .polar file

Hi Rob, Thanks for your prompt response. Regards, Srinidhi On Friday, August 29, 2025 at 11:12:14 PM

Sep 1

Sep 1

OpenVSP 3.45.4 Released

Another small bugfix release. This time, none of the fixes are applicable (well, one technically

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OpenVSP 3.45.4 Released

Another small bugfix release. This time, none of the fixes are applicable (well, one technically

Sep 1

Ronald Pandolfi, Rob McDonald2

Aug 31

Possible Instabilities with Panel Method

VSPAERO was essentially unchanged from OpenVSP release 3.34.0 to 3.44.X. It received a major update

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Possible Instabilities with Panel Method

VSPAERO was essentially unchanged from OpenVSP release 3.34.0 to 3.44.X. It received a major update

Aug 31

vrmail...@gmail.com, … Neal Pfeiffer10

Aug 30

Wing Sweep angle discrepancy

Thanks for the additional information Rob! On Saturday, August 30, 2025 at 12:28:02 AM CDT, Rob

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Wing Sweep angle discrepancy

Thanks for the additional information Rob! On Saturday, August 30, 2025 at 12:28:02 AM CDT, Rob

Aug 30

Erick Carlos Da Silva Garcia, Rob McDonald7

Aug 28

vspaero crashing when launch solver

You have both the Thin and Thick sets set to All in this model. Don't do that. All components

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vspaero crashing when launch solver

You have both the Thin and Thick sets set to All in this model. Don't do that. All components

Aug 28

Gerry Beylerian, Rob McDonald2

Aug 28

OpenVSP-3.45.0-win64 Crashing when Opening Files

If you can share an example file that exhibits this behavior, I can try to debug it. Rob On Wednesday

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OpenVSP-3.45.0-win64 Crashing when Opening Files

If you can share an example file that exhibits this behavior, I can try to debug it. Rob On Wednesday

Aug 28

Filippo Pattacini, Rob McDonald2

Aug 27

Problems with rudder design

What version of OpenVSP are you using? Please update to 3.45.3 and report how it goes. Can you post

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Problems with rudder design

What version of OpenVSP are you using? Please update to 3.45.3 and report how it goes. Can you post

Aug 27

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