2B1 "Oka" ("Transformer")
| Specifications | 2B1 "Oka" 420-mm mortar |
| Manufacturer | Union of Soviet Socialist Republics |
| Years of development from 1955 to 1960 | |
| Years of production | 1957 |
| Number of issued, pcs. | 4 |
| Operators | Union of Soviet Socialist Republics |
| Protection | bulletproof. |
| Crew | 7 people |
| Dimensions | |
| Length (with gun forward) | 27.85 m |
| width | 3.08 m, |
| height | 5.73 m. |
| Clearance , mm | 460 |
| Weight | 55-55.3 tons. |
| Mobility | |
| Power plant | diesel engine, liquid-cooled |
| Engine type | V-12-6B |
| Engine power | 552 kW (750 hp) |
| Power density | 13.6 hp / tonne. |
| maximum speed on the highway | 30 km / h. |
| Cruising on the highway | 220 km. |
| Specific power, l. c./t | 13.6 |
| Suspension type | individual torsional beam |
| Specific ground pressure, kg / cm² | 0.65 |
| Armament | |
| Gun type | 420-mm mortar 2B2 |
| barrel length | 47.5 caliber (about 20 m) |
| Angles of VN, deg. | + 50 ... + 75 |
| Angles of GN, deg. | no |
| Rate | 1 rds / min 5 |
| Firing range |
|
| Sights | TPV-51, "Angle", C-71-5, ZIS-3 |
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