RD-0243
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The RD-0243 (Russian: Ракетный Двигатель-0243, romanized: Raketnyy Dvigatel-0243, lit. 'Rocket Engine 0243') is a propulsion module composed of an RD-0244 main engine and a RD-0245 vernier thruster. Both are liquid-fuel rocket engines, burning a hypergolic mixture of unsymmetrical dimethylhydrazine (UDMH) fuel with dinitrogen tetroxide (N2O4) oxidizer. The RD-0244 main engine operates in the oxidizer rich staged combustion cycle, while the vernier RD-0245 uses the simpler gas generator cycle. Since volume is at a premium on submarine launches, this module is submerged on the propellant tank.[3] Its development period was from 1977 to 1985, having had its first launch on December 27, 1981. Originally developed for the RSM-54, it was used later for the Shtil'.[1]
| Country of origin | Soviet Union |
|---|---|
| First flight | 1981-12-27[1] |
| Designer | OKB-154[1] |
| Associated LV | RSM-54, Shtil'[1] |
| Status | Retired |
| Liquid-fuel engine | |
| Propellant | N2O4[1] / UDMH[1] |
| Mixture ratio | 2.6[2] |
| Cycle | Oxidizer Rich Staged combustion[1] |
| Configuration | |
| Chamber | 1[2] |
| Performance | |
| Thrust | 682 kilonewtons (153,000 lbf)[2] |
| Chamber pressure | 27.5 megapascals (3,990 psi)[2] |
| Specific impulse, vacuum | 310 s (3.0 km/s)[2] |
| Specific impulse, sea-level | 280 s (2.7 km/s)[2] |
| Burn time | 74 seconds[2] |
| Used in | |
| RD-0243 Propulsion Module[3] | |
| Country of origin | USSR |
|---|---|
| First flight | 1981-12-27[1] |
| Designer | OKB-154[1] |
| Associated LV | RSM-54, Shtil'[1] |
| Status | Retired |
| Liquid-fuel engine | |
| Propellant | N2O4[1] / UDMH[1] |
| Mixture ratio | 2.6[4] |
| Cycle | Gas Generator[1] |
| Configuration | |
| Chamber | 4[4] |
| Nozzle ratio | 14 |
| Performance | |
| Thrust | 211 kilonewtons (47,000 lbf)[4] |
| Chamber pressure | 14.7 megapascals (2,130 psi)[4] |
| Specific impulse, vacuum | 300 s (2.9 km/s)[4] |
| Specific impulse, sea-level | 280 s (2.7 km/s)[4] |
| Burn time | 79 seconds[4] |
| Used in | |
| RD-0243 Propulsion Module[3] | |
