Columns: KV-1 with 75 mm armour, KV-3 with 90 mm armour, KV-3 with 120 mm armour, KV-1S. KV-3 with 90 mm of armour is obviously the T-150.
Rows:
Hull
|
Left side
|
Right side
|
Upper front plate
|
Lower front plate
|
Upper rear plate
|
Lower rear plate
|
Front bottom plate (40 mm)
|
Rear bottom plate (30 mm)
|
Front roof
|
Engine compartment roof
|
Internal walls
|
Hull mass
|
Turret
|
Upper rear plate
|
Lower rear plate
|
Right side
|
Left side
|
Front plate
|
Frame cover
|
Roof
|
Turret holders
|
Turret weight
|
Total hull and turret weight
|
"Mass of the KV-1 tank: 46,000 kg
Mass of the KV-3 with 90 mm of armour: 50,200 kg
Subtracting the mass of the hull, we get:
Internals of the KV-1: 22,540 kg
Internals of the KV-3: 24,300 kg
Taking the weight of the internals of the KV-3 with 120 mm of armour as the same 24,300 kg, and counting that the ZiS-5 is 300 kg heavier, the KV-3 (120 mm) works out to be 52,801 kg.
I deem the construction of a tank with 120 mm of front armour and a 76 mm ZiS-5 gun that weighs no more than 54-55 tons viable."
CAMD RF 38-11355-107
The ZiS-5 isn't the gun that went on the KV-1 and KV-1S, but an older index, referring to a 76 mm tank gun with ballistics of the 3-K model 1931 AA gun.
Another table, comparing the masses of only turrets, but for many more vehicles. The data is approximate, due to manufacturing tolerances individual turrets could end up heavier or lighter.
Vehicle
|
Turret weight (kg)
|
|
With turret ring
|
Without turret ring
|
|
Domestic
|
||
KV-1S
|
5300
|
5670
|
T-34 (76 mm)
|
2700
|
2890
|
BT-7
|
600
|
645
|
T-26
|
750
|
805
|
T-80
|
1250
|
1340
|
T-70
|
1000
|
1070
|
T-60
|
550
|
590
|
BA-10
|
450
|
485
|
BA-20
|
150
|
165
|
BA-64
|
110
|
120
|
Captured
|
||
Tiger
|
6000
|
6450
|
Panther
|
4700
|
5050
|
PzIV
|
3000
|
3220
|
PzIII
|
2000
|
2140
|
PzII Ausf. B
|
650
|
700
|
SdKfz 221
|
200
|
215
|
SdKfz 222
|
350
|
375
|
Allies
|
||
M3 Light
|
900
|
965
|
Churchill
|
3600
|
3850
|
Valentine
|
1400
|
1500
|
Matilda
|
3100
|
3320
|
M3 Medium
|
1900
|
2035
|
M4A2
|
3500
|
3750
|
M4A4
|
3500
|
3750
|
Sadly, these notes do not appear to mention what modification. Another document is provided stating the weight of the Matilda turret to be 3812 kg with the turret ring and 3567 without, with the same figured for the Valentine being 2415 kg and 2210 kg, significantly higher than the ones in the table. However, the latter figures count the gun mantlet, while the former ones presumably do not.
I think you mixed up the turret weights a bit. The turrets all seem to weigh more withOUT the turret ring. Seems suspicious to me.
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