Hmm.. now that we talk about AH, I remember the B17 when it was capable of going so fast that it was in danger of shredding its wings and eventually ending up so high that it bumped against the "roof"
Just didnt stop... not even at 60,000ft or what was the roof again :>
It was quite fun one.. could climb faster than any fighter and keep speed up to stresshold of the plane.
It actually kept speeding even without engines.
Spitfire was once a space rocket too.. nothing kept after it.
Once PzIV kept sitting on a field, I kept dropping bombs on it and strafing it.. getting kills once in a while.
Then I finally asked the guy where he really was, since he didnt seem to be there.
Appeared he was at the vehicle base, not 300 meters from my field.
So I was able to kill him every time from next to my field, when he spawned some 5km away
oh well, I guess those were just temporary features which were acceptable..