parachuting the likes of a t80 is very unrealistic
ight vehicles such as jeeps, artillery pieces etc are the heaviest vehicles that would be parachuted in
Heavy lift helicopters would undersling slightly heavier equipment, eg light apc's like the bmd etc, maybe 20 tons maximum
Heavy battle tanks weighing from 65 tons and upwards cannot be dropped in such a way (afaik)
how about instead, in your mission, have your paratroopers secure a beach head , or a marine insertion do likewise and then setvelocity an LST (which is waiting offshore somewhere) to the beach head then setpos the tanks infront of the LST as if they are being unloaded , that would give your mission much more credibility