Sunday, May 27, 2012

Analyze, Print & Export NACA Airfoils

A limited edition version of VisualFoil 5.0 is now available for the price of $69.
This version allows the analysis of NACA 4, 5 and 6-digit airfoils using the built-in library. In addition, the airfoils can be modified within the program and exported to ASCII (text) or .dxf file formats.
VisualFoil 5.0 uses a linear strength vortex panel method coupled with boundary layer analysis solver  to compute lift, drag and moment coefficients for subsonic (Prandtl-Glauert correction) and incompressible flows past airfoils. The stall model allows the estimation of the angle of maximum lift. Graphs of Cl vs angle of attack, Cl vs Cd and other curves are available within the software and can be exported to external reports.

More information about VisualFoil can be found at:
VisualFoil 5.0 is excellent for:
  • accurate airfoil analysis and computing lift, drag and moment coefficients
  • NACA 4, 5 & 6-Digit Airfoil library 
  • student projects (aircraft, wind energy, hydrofoils)
  • an inexpensive airfoil reference tool
  • classroom demonstrations
  • printing airfoils templates on a Windows supported printer
  • exporting accurate representations of airfoils to .dxf files  
The NACA-Version of VisualFoil requires a PC or Laptop running Windows XP, Vista or Version 7. The purchase price is $69 US.

Please use the following link to purchase the software.

Do not hesitate to contact me at (352) 249-3658 if you have any questions.

Thanks for reading.


  1. This is a good idea. However, I would need compressible flow to be useful to me. I've been wondering if you could think up a way to determine lift, drag, and moment vibration characteristics as well. Moreover, the magnitude and frequency of the variations in these quantities. Having the mean is nice, obviously. Having the unsteady quantities would really be a standout feature. Being able to animate the transient flow too, would be eye catching. So the bottom line would be you could model an airfoil at a high/low angle of attack (say 30 degrees) and you could animate the turbulent flow and be able to say lift, drag, and moment are x, y, z but also say they vary by some % from their means (due to turbulence) and at what frequencies they vary.

    1. Anthony,
      Thanks for your comments. VisualFoil Plus comes very close to your description. If you set the software to display the results every 1 or 2 iterations, you can see the progress of the transient solution. You may also print the transient data during the conversion process. The program also can be controlled by an external routine which can input evolving airfoil shapes in response to the computed results of VF Plus.

    2. BTW, more information about VisualFoil Plus can be found at:

      A releated video can be found at: