| RD-0233 (РД-0233) | |
| Country Of Origin: | USSR |
| First Date: | 1973-04-09 |
| Designer: | OKB-154 |
| Associated: | UR-100N, Rokot and Strela |
| Status: | Out of Production |
| Type: | liquid |
| Oxidiser: | N2O4 |
| Fuel: | UDMH |
| Cycle: | Oxidizer Rich Staged Combustion |
| Combustion Chamber: | 1 |
| Thrust: | 520kN |
| Chamber Pressure: | 20.5MPa |
| Specific Impulse Vacuum: | 310isp |
| Specific Impulse Sea Level: | 285isp |
| Burn Time: | 121 seconds |
| Used In: | UR-100N core stage |
The RD-0233 (GRAU Index 15D95) and RD-0234 (GRAU Index 15D96) are liquid rocket engines, burning N2O4 and UDMH in the oxidizer rich staged combustion cycle. The only difference between the RD-0233 and the RD-0234 is that the latter has a heat exchanger to heat the pressuring gasses for the tanks. Three RD-0233 and one RD-0234 are used on the first stage of the UR-100UTTKh ICBM. While the engine is out of production, the ICBM as well as Rokot and Strela remain operational as of 2015.