How do I use an inverted airfoil for my horizontal stabilizer in AirplanePDQ?
Some aircraft use a cambered airfoil for their horizontal stabilizer that is inverted so that it generates negative lift when at zero angle of attack. AirplanePDQ does not currently automatically handle inverting an airfoil shape for use in this manner. Consequently, to use an airfoil in the AirplanePDQ airfoil library in an inverted manner, you must modify the data supplied in the airfoil library to create a new inverted airfoil. For this tutorial we will create an inverted version of the NACA 2412 airfoil. In order to create our new inverted NACA 2412 airfoil we will need to modify or create three different files. The first is the airfoil shape file. This is a file that contains the profile of the airfoil shape in and drawing (DWG) file format. The second is the table of aerodynamic coefficients for the airfoil in PEF file format. The third is the airfoils file which contains a list of all of the airfoils in the AirplanePDQ library. Before beginning this tutorial, you should read the
