Another point worth considering:
Hellfire missiles are supposed to arc high into the air and then come straight down upon their targets. This has 2 advantages. First, tanks usually have thinner armor on the top. Second, the shot can bypass objects that would otherwise impede a direct line of sight shot (low hills, dug in tanks, trees, etc).
In ArmA, Hellfires are direct line of fire weapons. You need a clear line of sight to the target. Many MANY MANY times I have shot a hellfire at a target from 1200 meters only to have it hit something along the way. For the tank, this isn't as much of a problem. It is sending a wall of lead at the chopper. if a few bullets hit a tree, no problem.
So some would say, no problem! Fly at 200 meter altitude and 5000 meters out! PROBLEM: Flying at high altitude and far away might work when fighting the AI, but in the VS. servers, flying that high is just an invite to get a stinger missile shot at you. I have no problem flying under 50 meters at all times and not crashing. It keeps me from getting shot down quite well. When I get shot down its when I turn to point my guns at the enemy. They have an equal chance of hitting me, and my missile takes much longer to reach the target.
Flying Low and moving fast keeps a chopper alive both in ArmA and in real life. The problem is that the Chopper's best weapon, the Air to Ground missiles, do no behave as their real-life counterparts.
