I dont know if anyone else out there has noticed but the Helicopters in Bad Company 2: Vietnam are stupidly hard to shoot down.
I consider myself quite a Veteran at the original Bad Company 2 where heli's weren't all that much of a problem with the tracer dart and rpg combo, but I am really struggling with them in Vietnam.
Currently I just chip away slowly with an LMG and hope they dont fly off the get healed. Is there something incredibly obvious that I am missing ? because its just plain ridicolous how much damage these things can do sometimes (even if the pilot isnt anything special).