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Soviet Union's SU-122 (Samochodnaya Ustanovka) self propelled gun

Photos

SU-122 self propelled gun:
Soviet Union's SU-122 self propelled gun

SU-122 self propelled gun:
Soviet Union's SU-122 self propelled gun

SU-122 self propelled gun:
Soviet Union's SU-122 self propelled gun
SU-122 self propelled gun:
Soviet Union's SU-122 self propelled gun

SU-122 self propelled gun:
Soviet Union's SU-122 self propelled gun
SU-122 self propelled gun:
Soviet Union's SU-122 self propelled gun

SU-122 self propelled gun:
Soviet Union's SU-122 self propelled gunn
SU-122 self propelled gun:
Soviet Union's SU-122 self propelled gun

SU-122 self propelled gun:
Soviet Union's SU-122 self propelled gun
Forces of Valor 1/72 Diecast Armor, 85041:
Forces of Valor 1/72 Diecast Armor 85041, USSR's SU-122

Design

In the summer of 1942, S.J. Kotin and other designers, were given the task to develop a medium self-propelled gun initially called the SU-35.2
The Central Artillery Directorate (GAU) in April 1942 gave instructions to several design teams to work on a self propelled vehicle that could carry the 122 mm gun.1

Crew

The five man crew were able to work inside the roomy (compaired to tanks with turrets) superstructure.1

Armament

The gun was held in a cast mantlet with fabricated armor cover for the recoil system. Excelled at attacking strong points but was weak on antitank performance. HEAT ammunition was developed but is was only effective at short ranges and still wasn't capable of piercing much armor.

Late models had similar ball mantlet as the SU-85.2

Prototype

UZTM Team

The Uralsky Heavy Machine Tool Factory (UZTM) designated its design as the U-35.1 They used a T-34 chassis to build a box like superstructure onto.1,2 The superstructure had a 122 mm M-30 gun installed.1 The frontal armor was 1.77" / 45 mm thick.1

Zavod Nr 592 Team

The Zavod team designated its design as the SG-122.1 This used a German PzKpfw III chassis with a new hull.1 It posed great difficulties with mainenance of a foreign made chassis without spare parts being available.1

Production

First issued in January 1943. In late 1943 production was phased out in favor of SU-152.

  • SU-122: 1,1482
    • Production: December 1942 - 19441
      • 1942: 252, 261
      • 1943: 6301,2
      • 1944: 4931,2

Variants

  • SU-122:
  • SU-122M: Prototype.1
  • SU-122P: Prototype.1,2 Self propelled gun with a 122 mm 1931/37 corps cannon.2 Was to be a tank destroyer.1
  • SU-122-3: Prototype.1

Usage

Used in platoons of 3 vehicles each.

In the spring of 1943 self propelled gun regiments were formed with 17 SU-76s and 8 SU-122s.2 In April they had 4 or 5 batteries of 5 guns each of the same type.2 They were to support the infantry and defend against tank attacks.2

Specifications

Samokhodnaya Ustanovka (self propelled mounting) SU-122
Crew Driver, gunner, commander, 2: loaders1
51
Physical Characteristics  
Weight 69,440 lb
30 tons1, 30.9 tons1, 34 tons1
30,900 kg1
Length 22' 8"1, 23' 2"
6.95 m1
Height 7' 5"1, 7' 8.5"
2.32 m1, 2.3 m1
Width 9' 8"1, 10'
3 m1
Ground clearance  
Ground contact length  
Ground pressure  
Armament  
Main 122 mm M38 howitzer,
122 mm M-30S1 ,
122 mm Howitzer1
Secondary  
MG  
Side arms  
Quantity  
Main  
Secondary  
MG  
Side arms  
Armor Thickness (mm)  
Hull Front, Upper 451
Hull Front, Lower  
Hull Sides, Upper 451
Hull Sides, Lower  
Hull Rear 451
Hull Top 201
Hull Bottom 201
Superstructure Front  
Superstructure Sides  
Superstructure Rear  
Superstructure Top  
Engine (Make / Model) W-2, V-21
Bore / stroke  
Cylinders  
Net HP  
Transmission  
Power to weight  
Fuel type  
Octane  
Capacity 810 liters1
178 gallons1
Performance  
Traverse 10° each way3
Speed - Road 34 mph1, 35 mph
55 kph1
Speed - Cross Country  
Range - Road 186 miles1, 186.4 miles1
300 km1
Range - Cross Country 93 miles1
150 km1
Turning Radius  
Elevation Limits  
Fording depth  
Trench crossing  
Vertical Obstacle  
Climbing ability  
Suspension (Type)  
Wheels each side  
Return rollers each side  
Track length  
Tires  
Track width  
Track centers/tread  
Samokhodnaya Ustanovka (self propelled mounting) SU-122 Model 19431
Crew 4 - 52, 51
Physical Characteristics  
Weight 30.9 tons2, 34 tons1
30,900 kg1
Length w/gun 22' 8"1
6.95 m1,2
Length w/o gun 5.93 m2
Height 7' 5"1
2.15 m2, 2.3 m1
Width 9' 8"1
3 m1,2
Ground clearance 0.4 m2
Ground contact length  
Ground pressure 0.68 kp/cm2 2
Armament  
Main 122 mm howitzer1
122 mm 1938 M-30 S2
Secondary  
MG  
Side arms  
Quantity  
Main 402
Secondary  
MG  
Side arms  
Armor Thickness (mm) 1.77"1
451
Hull Front, Upper 452
Hull Front, Lower 452
Hull Sides, Upper 452
Hull Sides, Lower 452
Hull Rear 452
Hull Top 202
Hull Bottom 102
Superstructure Front  
Superstructure Sides  
Superstructure Rear  
Superstructure Top  
Engine (Make / Model) W-2/342
Bore / stroke 4 stroke2
Cylinders V-122
Net HP 500@1,800 rpm2
Transmission  
Power to weight 16.2 hp/ton2
Fuel type Diesel2
Octane  
Capacity 800 liters2
Performance  
Traverse -3° to +25°2, 20°
Speed - Road 34 mph1
55 kph1,2
Speed - Cross Country  
Range - Road 186.4 miles1
300 km1, 600 km2
Range - Cross Country  
Turning Radius  
Elevation Limits  
Fording depth 1.3 m2
Trench crossing 2.5 m2
Vertical Obstacle 0.73 m2
Climbing ability 30 - 33°2
Suspension (Type)  
Wheels each side  
Return rollers each side  
Track length  
Tires  
Track width  
Track centers/tread  

Sources:

  1. Russian Tanks of World War II Stalin's Armored Might, by Tim Bean & Will Fowler, 2002
  2. Russian Tanks and Armored Vehicles 1917-1945, by Wolfgang Fleischer, 1999
  3. Removed
20th Century American Military History Crucial Site