Proposed Soviet Heavy Tanks, Spring 1941

The USSR was developing tons of heavy tanks before the start of the war, with very many variations on possible designs of the KV-4 and KV-5. The characteristics of the final designs are summarized in this table.

Tank Name		T-44	KV-3	KV-4	KV-5
Mass (tons)		29.5	68	75	90
Armour (mm)	Front	75	120	130	170
	Side	60	90	125	150
	Top and bottom	30 and 23	40 and 30	50	50
Armament	Gun	1 76 mm or	1 107 mm	1 107 mm	1 107 mm
	Gun	1 57 mm
	Machineguns	3	2	2	2
Ammunition	Shells	100	50	100	100
	Bullets	6000
Engine power (hp)		600	850	1200	1200
Maximum speed (kph)		55-60	30	30	30
Fuel capacity (hours)		10	10	10	10
Crew		4-5	6	6-8	6-8

CAMD RF 38-11355-949

The T-44 is, of course, not the late-war medium tank, but the pre-war medium/heavy tank, more commonly known as the A-44. 

Eagle-eyed readers may detect some mystery in this table. Take a look at the KV-4 column. One gun, 90 tons, 170 mm of front armour, 35 kph top speed? This isn't Shashmurin's project, the one he claimed won the tender in his memoirs!