Falconek wrote:I heard funny thing about 2A6 though:
The longer L55 barrel has bigger inertia, thus compared to 2A5 stabilisation is worse, cause the system has harder task to deal with.
Now... there are basically four types of APFSDS ammunition in the world, that reach over 750mm RHA (which is more or less what you need to break through T-80 front with ERA): M829A2, M829A3, DM53, DM63. Thing is german ammo reaches this parameter only with L55 cannon, while american does it with L44 (thus easier to stabilise) cannon.
At least this is is what I heard... anyway something to think about
You can't really compare RHA with composite armor nor pull up an equivalent (especially if the composite armor fitted with ERA). Nobody today will really reveal all technical characteristics about tank armor (like americans/brits not revealing secret of chobham), so you can't really know the level of T-80 armor protection. I've read it somewhere that americans purchased few T-80s after the fall of the soviet union and tested them, no results were revealed to public.