The il2 wasnt a "tank" most of its armor was 6mm or so. LW pilots made careers out of smacking il2s out of the sky.....
Hauptmann Joachim Brendel shot down 88 il2s.
http://www.luftwaffe.cz/stormovik.htmllipfert shot down 2 il2s on several occassions
148. ----> 23.10.1944 ----> 15:31 ----> Il-2 ----> II./JG52 Solnok
149. ----> 23.10.1944 ----> 15:32 ----> Il-2 ----> II./JG52 Solnok
Then again
155. ---->17.11.1944 ----> 11:05 Il-2 ----> II./JG52 Jaszbereny
156. ---->17.11.1944 ----> 11:10 Il-2 ----> II./JG52 Jaszbereny
Then again
169. ----> 4.1.1945 8:26 ----> Il-2 ----> II./JG52 Tarjan
170. ----> 4.1.1945 8:28 ----> Il-2 ----> II./JG52 Tarjan
I could post varios lw kill claim that show multiple il2s downed 1 right after another.
Moot is right that in AH any bullet that hits at any angle and location contributes equally to the overall damage. In AH the tail section of most aircraft pop off rather easily. But in il2 and il2 FB the 20mm and LMGs (7.6, 12.7 13mm etc) are nerfed and are under modelled.
The real IL2 has its "armor" around its pilot and engine. Its wings, tail gunner and tail were weak. Inreality firing from dead 6 was a low percentage shot and any "offangle attack" gave you a larger target to shoot at.
The Morane-Saulnier 406 that Hemmo Leino:
The rat guns were miserably weak and the mags were of small capacity, it was not much good for anything. But the Berezina heavy machine gun was good.
One 20 mm Hispano-Suiza HS-9 or 404 cannon with
60 bullets; two 7,5 mm MAC 1934 machine-guns with
300 bullets each.
As you can see it isnt heavily armed and has limited ammo. To make the most effiecient use of this ammo you would want high percentage shots. In the game Il2 and FB the easiest way to kill and il2 is to shoot the oil cooler underneath the center fuselage. Hit it their a few good times and it smokes, hit it again it burns.
The only real problem the il2s in AH have is the ease at which it gets hit by gv mgs, but all ah planes share this problem. GVs are easy to spot and kill so a gameplay concession has been made to allow them some prospect of defense against air attack. Unfortunately any hizooka or 50cal plane is a much better anti gv / attack aircraft due to their ammo load, the range at which they can kill and their unrestricted "overload" ord carrying capability.
Taking 1 question and applying that answer to justify some problem in AH is a bit simplistic. The il2 may very well be "weaker" then in rl but I dont think theres evidence enough to support that.
Especially since those lw pilot who were lucky enough to stumble upon them could easily pad their kill claims.
No plane was ever a tank..........