Unable to View Aerodynamic coefficients results in Excel from VSPAERO (B777-200ER model)

[Violet Philip]

Dear OpenVSP Google groups, 

I hope this message finds you well.

I am currently working on a project involving the aerodynamic analysis of a Boeing 777-200ER model using OpenVSP. I have successfully modeled the aircraft in the software, and I am now attempting to run VSPAERO simulations to analyze aerodynamic coefficients with respect to angle of attack (Alpha).

However, I’ve encountered an issue: after running the analysis, I am unable to view the aerodynamic coefficients results in Excel as expected. The output files seem incomplete or missing the data I am looking for, particularly for Alpha sweep results. I'm not sure if I am missing a step in the setup or if there’s a problem with how the results are being exported.

To help clarify the issue, I have attached:

• Screenshots of the VSPAERO setup and output
• The .vsp3 file of my B777-200ER model

I would greatly appreciate any guidance or suggestions you can offer to help resolve this issue. Please let me know if you need any additional information or files.

Violet

[Amedeo FAlco]

Hi,  have you also checked the .lod and .polar files ?

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[Violet Philip]

No, I haven't. Do I need an app to access that?

Violet

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[Amedeo FAlco]

No, simply check in the folder where the.vsp3 model is stored. In this folder, after any analysis you'll find two types of file: .polar and .lod.

In the first one you can check all the coefficient at specified angle of attack ( AoA ) or sideslip ( Beta ).

In the last one you can find the loads acting on surf identified as WING generally.

To access at this file, you can use Notepad++ or with any other notepad app.

Ing.Falco

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[Violet Philip]

Like this?

Violet

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[Amedeo FAlco]

Yep. This a .polar file. Now you can copy and paste all these data in an Excel file. Than, click on 'Text to columns' in the Excel workbook and adjust as you prefer.

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[Violet Philip]

Okay, thanks very much. I'll let you know how it goes by tomorrow. It's midnight here

Violet

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