The difference here in speed is Mach 2.5 vs Svir/Reflex of 400 m/s it has like you have mentioned a high initial velocity but only for around 1km just like Helicopter ATGM's while MANPADS tend to sustain above Mach 2 speed.
What makes you think a helo could evade either?
and such ideas of using MANPADS on tanks have been thrown around before.
Generally thrown around and rejected... Most tanks will never see the missile from the helicopter that hits them let alone the helicopter. With modern net centric systems if a tank spots a helo it makes rather more sense for them to mark it on their map and let the air defence forces deal with it.
So in reality such MANPADS would have their use. Either spend 60.000 Euro on a MANPAD or waste 8 mln euro for a tank getting destroyed due the inbalance of tank vs helicopter and their respective capabilities against each other.
I am not disagreeing with the concept that the tanks need protection from aircraft... my problem with your solution is that the solution already exists and will likely already be standard ammo... plus with every tank there will be a heavy IFV which will carry troops armed with MANPADs already... and that does not even allow for Air defence vehicles operating with the unit... there will be no shortage of anti aircraft weapons... especially if they manage to develop a guided 45mm or 57mm shell for their IFVs.
The hole at the side is for rearming the autoloader, one reaches rounds through that hatch and another places them into the autoloader to load the carousel.
I rather doubt that... it would not make much sense to have a hole that shape for that purpose...
the rear turret bustle likely holds ready to load rounds for ramming into the breach.... I would say a door opening above that would be ideal for loading that loader which could then feed rounds down into the lower turret autoloader rather more easily and more rapidly.
BTW helicopters are incredibly fragile things... if you punch a hole right through one you will most likely hit something it needs to stay in the air...
The thermal imagers on armata will be as good if not better than any fitted to a modern attack helo and it is far easier to spot a flying target than one on the ground. Even just passive radar sensors to detect MMW radar emissions will help the armata detect a helicopter at extended ranges.
In the most common scenario we will see Armatas in their basic configuration,
Why not assume they turn off their APS as well and perhaps leave all that extra modular armour at home... why would they not fit their brand new expensive tanks with Nakidka?
The chances that the tank spots the helicopter first is unlikely and even if he does he is still not in the advantage over an Attack Helicopter.
the best chance the helicopter has of detecting a tank on the ground at long range is with radar and as these tanks already carry radar they should be able to detect helicopters at extended ranges...
With the T-14 tracking the chopper and relaying with MANPAD team or AAA team on truck.
Actually the nearest MANPAD team will be in a T-15 IFV...
Russians never relied on one Layer of defence for their tanks, never! And i doubt they will rely on just one now, but we will see that in 2 years
Nakidka means Javelin wont get an autonomous lock so has to be manually guided and has no top attack capability. APS should be able to engage top attack weapons... so there you have two layers at least.
Having such a large empty shell would be bizarre as it serves no purpose regardless of
how much of the speculated and rendered equipment it is supposedly covering.
Think of it in terms of critical and non critical systems... put critical systems... crew, ammo, fuel behind heavy protection... ie the hull... and move non critical systems and components into the turret... and duplicate them so that one hit wont take out the tank operationally.