How to Make a Smooth Wing from an Airfoil Section in FreeCAD

This video shows how to make a smooth wing part in FreeCAD from an airfoil section defined by coordinates in a file. (see the bottom of this description for a workaround if you're using Windows). The wing has sweep, taper and twist, and the thickness to chord ratio varies across the span. The result is a smooth 3D shape that follows the shape of the loaded airfoil section. There's a blog article accompanying this video that you can find here: http://www.ittextra.com/techPop.jsp?id=69 From the article website you can download the macro and airfoil section used in this video and the final part. Alternatively, download directly from here: http://www.ittextra.com/downloads/WingFromAirfoil.zip Feel free to leave any comments or questions on the video or the article below. ------------------------------ Windows workaround. I found that my macro does not work on a vanilla FreeCAD install on Windows. It seems to be related to tkinter but I haven't had chance to work out why yet. You can work around this by hard-coding the file path to the airfoil file as follows: Comment out the lines that mention tkinter and the two lines starting "root" as indicated below #import tkinter as tk #from tkinter.filedialog import askopenfilename #root = tk.Tk() #show askopenfilename dialog without the tkinter window #root.withdraw() Comment out the file_name line and replace with the hard-coded path to your file as shown. #default is all file types #file_name = askopenfilename() file_name = "C:/Users/MyUser/Documents/airfoils/NACA0012.dat" Save this macro and run. You'll need to change the path each time you want to use a different airfoil section. Hope this works for you.