Union Soviet Socialist Republics SU-122

World War 2 Tank and Gun Database

The SU-122, it was based on the SP Gun chassis and was in use from 1943.

Flag of World War 2 Union Soviet Socialist Republics

General Details (SP Artillery)

Specifications
Operational Date(s)	1943
Ordnance classification
Quantity Produced	0
Weight	unknown
Crew	4
M.G's small	n/a
M.G's large(>10mm)	n/a
Length	6.95 mtr
Width	3.26 mtr
Height	2.65 mtr
Engine Details/Performance
Max Road Speed	27 mph
Max Cross Country Speed	15 mph
Range Road	210 miles
Range Cross Country	unknown
Fuel Type	Diesel
Fuel Capacity	unknown
Horse Power	600 hp
Power/Weight	unknown

General Information
The SU-122, it was based on the SP Gun chassis and was in use from 1943. Its main armament consisted of a 122mm Corps Gun M1931/1937 A19 L/45 weighing 25.000 kg.

Armour Details

Turret
Front	n/a
Side	n/a
Rear	n/a
Top	n/a

Superstructure
Front	45mm	@	45°	(64mm)
Side	45mm	@	45°	(64mm)
Rear	45mm	@	45°	(64mm)
Top	20mm	@	90°	(20mm)

Hull
Front	45mm	@	45°	(64mm)
Side	45mm	@	0°	(45mm)
Rear	45mm	@	0°	(45mm)
Top	20mm	@	90°	(20mm)

Armour (x)mm @ (y)° (Effective mm @ 0°)

Effective Armour - Maximum 64 mm - Minimum 20 mm


122mm Corps Gun M1931/1937 A19 L/45
	Manufactured	1938 - unknown
	Calibre	122mm
	Length	L/45

Ammunition Details
Name/Id	Calibre Weight MVelocity					Explosive Content
OF-471 (APHE Armor Piercing High Explosive)	122mm 25Kg 800M/Sec
Quoted Penetration 120mm @ 500mtr/30° ( ? 138mm/0?)
Range(Mtr)	100	200	400	800	1200	1600	2000	2400
Flight Time(Secs)	0.13	0.25	0.51	1.05	1.61	2.2	2.81	3.44
Penetration(mm@30°)	154	151	146	136	127	118	110	103
Penetration(mm@0°)	178	175	169	158	147	137	128	119
Hit Probability(%)	98	98	95	88	68	55	37	25

Range(Mtr)	1000	2000	3000	4000	5000	6000	7000	8000
OF-471 (HE High Explosive)	122mm 25Kg 800M/Sec					3.600Kg explosive
Flight Time(Secs)	1.33	2.81	4.43	6.21	8.11	10.15	12.3	14.56
lateral dispersion means the side to side variation of the shell from the aiming point
50%(CEP) of shells land within +/- (mtr)	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
80% of shells land within +/- (mtr)
95% of shells land within +/- (mtr)
range dispersion means the back to front variation of the shell from the aiming point
50%(CEP) of shells land within +/- (mtr)
80% of shells land within +/- (mtr)
95% of shells land within +/- (mtr)
Direct Fire
Range(Mtr)	100	200	400	800
Flight Time(Secs)	0.13	0.25	0.52	1.07
Hit Probability(%)	98	98	95	88
Blast/Fragmentation Effects
Burst radius Infantry in open 99% kill	4 mtr	Burst radius Infantry in open 66% kill						9 mtr
Burst radius Infantry in open 33% kill	24 mtr	Armour Penetration inc roof at 1 mtr						10 mm
An explosion within 4 mtr of infantry in the open will cause 99% casualties - lethal.
An explosion within 9 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's.
An explosion within 24 mtr of infantry in the open will cause 33% casualties.
The blast effect of this shell exploding within 1 mtr of an armoured vehicle will penetrate 10 mm of the tank armour including the roof.

About Penetration Figures

All penetration figures in this database are calculated to a common standard based on German WWII testing criteria (complete penetration with functioning fuze). This allows direct comparison between all nations' guns.

Original national test figures would be higher for some nations due to different criteria:

German: 1.00? (baseline - strictest)
British: 1.02? (slightly looser)
American: 1.05? (50% mass through plate)
Soviet: 1.10? (75% mass through plate)

For example, a Soviet gun showing 159mm here would be published as ~175mm in Soviet documents, and a German gun showing 120mm would be published as 120mm in German documents. The 159mm figure is directly comparable to the German 120mm - the Soviet gun really was more powerful.

National Testing Standards
German:	1.00? - Complete penetration, fuze functions (strictest)
British:	1.02? - Complete penetration
American:	1.05? - 50% of shell mass through plate
Soviet:	1.10? - 75% of shell mass through plate
All database figures are normalized to German standard for direct comparison. Multiply by the factor above to see original national test figures.

Hit probability is based on a static 2 x 2.4 metre panel at 0 degrees(vertical) at the range specified.

The data that has been used to create these records has come from Wikipedia, The Lone Sentry, The Bundes Archive and numerous books and websites that have provided the detailed information that has not been available anywhere else. The information we use to calculate the penetration tables, flight times and the hit probability comes from the Gun Calibre, the Shell Mass(Kg) and the muzzle velocity, plus range reductions to allow for gravity and wind resistance. This calculation originally came from a pre-war Krupp calculation which has been modified, and seems to fit the actual test results.