S2.253 ( GRAU index - 8D511 ) is a liquid - propellant rocket engine on long-term, high-boiling rocket fuel components developed at NII-88 under the direction of A. M. Isaev in 1949-1955 for operational tactical missiles R-11 / R-11M .
| S2.253 | |
|---|---|
| Type of | LRE with an open scheme |
| Fuel | kerosene ( TG-02 ) |
| Oxidizing agent | Nitric acid |
| Combustion chambers | one |
| A country | the USSR |
| Using | |
| Operation time | c 1955 |
| Application | R-11 (8A61), R-11M (8K11), R-11FM |
| Production | |
| Constructor | A.M. Isaev |
| Time of creation | 1949 - 1955 |
| Manufacturer | NII-88 (later OKB-2 NII-88) |
| Produced | since 1955 |
| Options | S2.253A |
| Weight and size specifications | |
| Dry weight | 61 kg |
| Diameter | 1000 mm |
| Performance | |
| Traction | Vacuum: 93.3 kN (9.514 ton) Earth: 81.37 kN (8.300 ton-force) |
| Specific impulse | Earth: 219 s |
| Working hours | 95 s |
| Ignition | self ignition (starting fuel TG-02) |
Construction
The propulsion system consists of a single-chamber rocket engine. The supply of fuel and oxidizer to the engine is pressure, the tank is inflated with compressed nitrogen . In addition, compressed nitrogen is used in the control circuits of automation units.
Modifications
S2.253A - modification of the engine for the ballistic missile submarines R-11FM created in 1953-1959.
Also, S2.253 on the fuel pair, liquid oxygen / kerosene, was proposed for installation on the first stage of the experimental cruise missile “ESR” by the design bureau S. P. Korolev.
| C2.253 | S2.253A | C2.253 for "ER" | |
|---|---|---|---|
| Oxidizing agent | Nitric acid | liquid oxygen | |
| Fuel | kerosene ( TG-02 ) | kerosene | |
| Traction in the void | 93.3 kN | 93 kN | 107.3 kN |
| Traction at sea level | 81.37 kN | 81.37 kN | |
| Specific impulse (in emptiness) | 250 s | ||
| Specific impulse (at sea level) | 219 seconds | 218 seconds | 217 seconds |
| Working hours | 95 s | 95 s | 127 s |
| Oxidizer / Fuel ratio | 3.76 | ||
| Diameter | 1000 mm | 1000 mm | |