it doesn't really matter what you do or can do, what matters is what most people do, and most libs kill any vehicles in less than one second. You're not going to kill any vehicle in less than a second with a lock on, by definition, you need to lock on first, and then, your damage will be peanuts, cause it's a lock on. How many lock on rockets do you need to kill a tank? Cause with a dumbfire rocket, which is a lot stronger, you still need at least 4 depending on where you hit the tank, that's a hell of a lot more than 1 second to kill a tank. So let's put it this way, if you get 2 friends and pull heavies, and kill more tanks than in a lib, it's because you and your friends have no idea how to fly a lib. But even then, I doubt that it's true, cause any noob can kill an enemy vehicle with a liberator in less than a second. edit, that's not to mention 2 more things : 1. mobility, a liberator can FLY, do I really have to argue why BEING ABLE TO FLY is better than not being able to fly? 2. tanking. Any inviltrator sniper will one shot your heavy. Your heavy, and your 2 friends, will die to grenades, enemy rockets, enemy infantry, enemy vehicles land and air. Infantry, by definition, does not tank. A lib however, is immune to small arms fire from infantry, hardly gets tickled by grenades, even anti vehicle grenades, can take a hell of a lot more rockets than infantry (duh), and generally, isn't only tanky, but because of its mobility (it is flying), it is a hell of a lot harder to hit.