How to Export NACA Points in XFoil
XFoil is a shareware program that is used to create models of airflow over two-dimensional and 3D airfoils and airplane wings. NACA points are airfoil coordinates or specific locations on an airfoil. These locations are placed in a grid and are utilized by the program to alter the airflow on the diagram. Export the NACA points in XFoil to a text editor so that you can create your own grid or save them in another type of file.
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Instructions
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Run XFoil. Click on "File" then select "New Project." Click on "Application" then select "Foil Direct Design." A window will open on-screen with an outline of an airfoil. Click on "Show Foil" to hide the design.
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Click on the "Foil" menu then select "NACA Foils." Select "0012" for the airfoil then select "100" for the number of panels. "NACA 0012" will show on the screen. Click on the listing located at the bottom of the page to highlight it.
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Go to the "Application" menu then click on "XFoil Direct Analysis" to open the analysis window. Select "Polars" then click on "Define Batch Polar" to open another window on-screen. Select "Type 1" for the key data type.
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Click on "Polars," select "View" then "Choose." Located on the right-hand side of the screen is a column labeled "Analysis." Enter your NACA points data. Type in the desired "Starting Sequence" number, the "Continuing Sequence" number and the "Step of Degree." For example, the starting sequence number could be -4, the continuing sequence number 20 and the step of degree 1.
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Select "Polars" then click on "View." Select "Cl v. alpha" and enter the desired data point.
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Click on "Graph" then select "Variables." Enter the desired variables to change the graph.
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Select "Polar" then click on "Current Polar." Select "Export" then save the NACA points to your text editor and export the points to another file.
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Tips & Warnings
You can also export the NACA points to Microsoft Excel if you have the program to create a labeled list of the points.
