I recently installed the wind tunnel app update on my iPad. Most of the aerodynamics examples that I had created and imported became corrupted. Many seem to be loaded one with each other. So be warned! I will try and re-load them from I-Tunes and see if that works. Overall, I have found this an excellent app for instructing aerodynamics.

I was disappointed to find that the promised 'values' of wind speed etc have yet to be incorporated.