| RD-0244 (РД-0244) | |
| Country Of Origin: | USSR |
| First Date: | 1981-12-27 |
| Designer: | OKB-154 |
| Associated: | RSM-54, Shtil' |
| Status: | Retired |
| Type: | liquid |
| Oxidiser: | N2O4 |
| Fuel: | UDMH |
| Mixture Ratio: | 2.6 |
| Cycle: | Oxidizer Rich Staged combustion |
| Combustion Chamber: | 1 |
| Thrust: | 682kN |
| Chamber Pressure: | 27.5MPa |
| Specific Impulse Vacuum: | 310isp |
| Specific Impulse Sea Level: | 280isp |
| Burn Time: | 74 seconds |
| Used In: | RD-0243 Propulsion Module |
| RD-0245 (РД-0245) | |
| Country Of Origin: | USSR |
| First Date: | 1981-12-27 |
| Designer: | OKB-154 |
| Associated: | RSM-54, Shtil' |
| Status: | Retired |
| Type: | liquid |
| Oxidiser: | N2O4 |
| Fuel: | UDMH |
| Mixture Ratio: | 2.6 |
| Cycle: | Gas Generator |
| Combustion Chamber: | 4 |
| Nozzle Ratio: | 14 |
| Thrust: | 211kN |
| Chamber Pressure: | 14.7MPa |
| Specific Impulse Vacuum: | 300isp |
| Specific Impulse Sea Level: | 280isp |
| Burn Time: | 79 seconds |
| Used In: | RD-0243 Propulsion Module |
The RD-0243 is a propulsion module composed of an RD-0244 main engine and a RD-0245 vernier engine. Both are liquid rocket engine, burning N2O4 and UDMH. 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. 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'.