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Photo: The original uploader was Ljubo at Bulgarian Wikipedia. · Wikimedia Commons · CC BY-SA 3.0
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Tanks · Russia · 1944
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IS-1

IS-1
IS-1 Photo: The original uploader was Ljubo at Bulgarian Wikipedia. · Wikimedia Commons · CC BY-SA 3.0
* Absolute score — assessed within category · no era adjustment
Firepower
60
Protection
55
Mobility
40
Technology
30
Reliability
65
Crew Survivability
50
Operational Range
45
Logistics
50
Historical Performance
70
Strategic Impact
60
Origin Russia
CategoryTanks
EraWorld War II
In service1944–1945
Operators1 countries
Quantity1,862
Data Quality84%
MASS(Military Archive Scoring System)
52
Tanks MASS Rating
19/140
World War II
160/563
All-Time
Tanks · 10 axes scored
Firepower
60
Protection
55
Mobility
40
Technology
30
Reliability
65
Crew Survivability
50
Operational Range
45
Logistics
50
Historical Performance
70
Strategic Impact
60
ⓘ Regardless of era, the same scoring system applies to all units in the tanks category.
01 / Overview
IS-1
Category
Country
Production
1944–1945
Quantity
1,862
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
TANKS · WORLD WAR II
19
PERFORMANCE/PRICE
75
UNIT COST (2025 USD)
—
52
tanks category
ⓘ Performance/Price and MASS score are computed across all units in the tanks category, regardless of era.
02 / Specs & Design
◎General4MOD.4
  • Tank ClassificationHeavy Tank
  • GenerationEarly Cold War
  • Combat Weight46 t
  • Crew Size4
◈Firepower9MOD.9
▣Protection7MOD.7
◇Mobility9MOD.9
  • Engine Power500 hp
  • Power-to-Weight Ratio10.9 hp/t
  • Fuel TypeDiesel
  • Transmission TypeManual
  • Suspension TypeTorsion Bar
  • Max Road Speed37 km/h
  • Max Off-Road Speed25 km/h
  • Operational Range (Road)200 km
  • Fording Depth0.9 m
◆Dimensions4MOD.4
  • Length (Hull)9.9 m
  • Width3.05 m
  • Height2.45 m
  • Ground Clearance0.45 m
⬢Amphibious & Special3MOD.3
▲Production & Service3MOD.3
  • Years in Production2 year
  • Current Service StatusRetired
  • Notable Variants Count2
03 / History
SERVICE LIFESPANRetired
  1. 1943Entered service
  2. 1944Production started
  3. 1945Production ended
82
years in service
1
years in production
1,862
units produced
0
countries operating
ⓘ The producing country no longer actively operates it. 1 countries retired it.
04 / Operators
Operator Countries1country
📖 TERMS ON THIS PAGE11terms
Active Protection System. A defensive system that detects and intercepts anti-tank threats.
Steel alloy cast into shape for armour applications.
Type of internal combustion engine fuel, refined from crude oil.
High-Explosive Fragmentation: ammunition that explodes on impact, releasing fragments.
A tank with heavy armor and firepower, prioritizing protection over mobility.
Manual: a tank transmission in which the driver selects gear changes manually, typically using a clutch pedal and gear lever to engage gears.
A fire control system relying on optical sights and manual input for aiming and range estimation without computer assistance.
Nuclear, Biological, Chemical protection for tank crews.
A rifled gun has spiral grooves cut into its barrel.
Handheld or vehicle-mounted devices that release dense smoke to obscure vision, conceal movements, or screen friendly forces from enemy observation.
A torsion bar is a steel rod that resists twisting and serves as a spring in tank suspensions, with one end fixed to the hull and the other connected to a lever arm moving the road wheel.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources
📖 ENCYCLOPEDIA Browse the Tanks entry →