Aircraft: reinstate below radar feature vs. vehicle missiles, fix radar range

It's actually the huge imbalance between the SU-57 and the F-35E turning speed that's the issue. Two equally skilled pilots face each other, the SU-57 wins all the time, because it's simply able to out-turn the F-35E. Also, if the F-35E goes VTOL in the middle of a dogfight, he might as well be dead. The SU-57 just loops around and guns it down. The VTOL thing is just a gimmick that only works against low skill bandits.