Only way you would be getting 45+ mph is with a very strong tail wind. I don't think I have ever gotten over 35 mph in sport with my air2.I recently purchased the AIR2S. Have flown it a few times. Get good MPH with normal mode around 33 mph. For some reason in Sport Mode it doesn't go much faster. I've seen video where people are getting 45+ mph. Anyone else have this issue or any suggestions to improve mph in Sport Mode?