We saw some Soviet pre-war prospective guns in a previous article, let's take a look at the rest of the list.
Name | Mass | Oscillating part mass | Top speed (kph) | Practical rate of fire RPM | Horizontal range | Vertical range | Max. range (km) | Muzzle velocity m/s | Shell mass (kg) | Effect/ Notes |
152 mm M-10 tank howitzer in the KV tank | 53 tons | 1890 | Up to 20 | 1-2 | 360 | -3 +12 | 6 | 436 | 51.07 | Penetrates 90 mm of armour at 1000 m |
122 mm corps gun for the KV tank | 54 tons | 3200 | Up to 20 | 2-3 | 360 | -3 +15 | 13 | 800 | 25.2 | Penetrates 130 mm at 30 degrees at 1000 m (calculated) |
85 mm SPG on T-34 chassis (tank destroyer) | 26 tons | 1200 | Up to 40 | 15 | 360 | -5 +45 | 17 | 800 | 9.2 | Penetrates up to 88 mm at 30 degrees at 1000 m (calculated) |
130 mm SPG (B-13) for the SMK | 64 tons | - | Up to 20 | 2 | 6 | +12 | 15 | 870 | 33.5 | Penetrates 130 mm of armour and 40 mm of iron liner at 4400 m. Ready by September 1st, 1940. |
152 mm SPG (Br-2) for the SMK | 64 tons | 4200 | Up to 20 | 0.5 | 6 | +12 | 13 | 860 | 51.07 | Penetrates 130 mm of armour at 30 degrees at 5000 m and 150 mm of armour at 0 degrees at 1100 m. Ready by September 1st, 1940. |
55-60 mm anti-tank gun | 1000 kg | - | Up to 50 | 15 | 60 | +25 | 13 | At least 1000 | Up to 3 | Penetrates 70 mm of armour at 1000 m at 30 degrees (calculated) |
76 mm anti-tank gun based on the USV or F-22 | Up to 1800 kg | 1200 | Up to 50 | 15 | 55 | +45 | 15 | 813 | 6.5 | Penetrates 70 mm of armour at 30 degrees at 1000 m. Uses shells from the mod. 1931 AA gun. Ready by October 1st, 1940 |
The first entry is pretty self explanatory: this is the KV-2. By this time, 4 KV-2s have been assembled, but it has not gone into production quite yet, so it still shows up on the experimental list. The second entry is quite interesting: some kind of proto-IS-2. It's interesting to see such a powerful gun in a rotating turret so early in the war.
Next, we have something my readers should already be familiar with. The 85 mm gun on a T-34 chassis is the U-20 tank destroyer.
Now here's something a little more obscure. Fans of Soviet tank history will know that the T-100, SMK, and KV faced off for the title of the Red Army's next heavy tank during the Winter War. By the summer of 1940, when this list was composed, the KV had already won. However, it seems that the SMK wasn't quite dead yet. Two SPGs, one with a 130 mm gun and one with a 152 mm gun, are still being pitched. The tank may have never moved forward, but the idea of SPGs with these guns remained. The 130 mm S-26, based on the B-13, was used in the ISU-130 SPG. The 152 mm Br-2 on a self propelled chassis was a long-lived dream of Soviet artillerymen, with several attempts, like the U-19, and S-51.
The 55-60 mm anti-tank gun is another familiar sight. This is, quite obviously, the ZIS-2. The 76 mm anti-tank gun, however, is more interesting. There were attempts to build guns for the KV (ZIS-5, first iteration) and T-34 (S-54) with the ballistics of this gun, so it's only logical that a towed version would also be made. This particular implementation looks similar to the Pak 36(r), with the existing F-22 being adapted for a more powerful round.