The Helicopters in this game are impervious to nearly all forms of damage. Infantry groundfire, APC shells, Tank shells, RPGs, submachinegun/pistol rounds.
It can tank more damage than an armor vehicle on the ground when you have someone with a repair tool in the back with infinite, passive repairs. The one and only thing that can kill it is the Tandem Rocket which will 1 shot kill a helicopter at any health and critical tail rotor hits.
I suggest you reduce the basehealth of the blackhawk/ka60 and improve it in other areas by buffing pilot protection through the glass window cockpit and the lethality of the miniguns against infantry targets.
