The problem with the Aim54 isnt against slow, high flying bombers, but against fighter sized targets at lower altitudes. I know that the phoenix wasn't designed to take out fighter sized targets, however it wasn't limited to just bomber intercepting. It still had the ability to track and hit targets that didnt manoeuvre hard, or notch the missile. I think the drag values at lower altitudes are too high at the moment, and also the rate at which the missile slows once the missile has stopped the burn phase is too high. The missile can be on a 60 degree pitch downwards, from a 100,000ft loft and still lose a ridiculous amount of speed, which leads to it being easily evadable, even with the later activation if the target size is small. I am talking from experience in MP, where people have literally just done a 180 and outran the missile. A similar thing happened while flying my JF17, I outran a phoenix launch that was launched 5nm away head, on. I managed to turn and run, and the missile couldn't catch me. A solid fuel rocket motor should propel the missile to at least just under mach 2 at low altitudes. I know drag is a huge factor but it seems like the missile is trying to fly through water and not air .