I was reading in another post that there are limitations to the hull or structure of such airplanes as the F-4 that are made of aluminum. The forum stated that the aircraft could only go mach 2 to 2.4 before the hull burnt up due to heat affecting the structural intergrity of the material used. It understand that this called friction and when an object is moving through such medium as oxygen that the faster you go the faster you strike these atoms which causes energy to be released. Now lets say for example a ship is traveling faster than the speed of light or near the speed of light, would any atoms that the hull comes in contact with create a friction against the hull? Or would the ship simply be traveling to fast and the contact not create any friction?