Neodymium Magnets Reaching Terminal Velocity

4 Hexagon layers of Neodymium magnets reaching Terminal Velocity with the help of some compressed air. Hanging from a string of Neodymium magnets. The magnets reach such a high speed the magnetic force can no longer repel the centrifugal forces supplied by the compressed air. We have tried several different formations and it would seem mass does have an effect on how high of an RPM you can reach before they give out. So i was not sure what exactly is going on here from a force stand point so i asked som