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Engine Model: RD-68. Manufacturer Name: RD-68. Other Designations: D-68. Designer: Yuzhnoye. Developed in: 1956-61. Application: R-16 stage 1 attitude control engine. Propellants: Nitric acid/UDMH. Thrust(vac): 380.000 kN (85,420 lbf). Chambers: 4. Country: Ukraine. Status: Out of Production.

Engine Model: RD-68M. Manufacturer Name: RD-68M. Other Designations: D-68M. Designer: Yuzhnoye. Developed in: 1962-1966. Application: R-36 stage 1 attitude control engine. Propellants: N2O4/UDMH. Thrust(vac): 285.000 kN (64,070 lbf). Burn time: 125 sec. Mass Engine: 326 kg (718 lb). Diameter: 3.45 m (11.31 ft). Length: 0.98 m (3.21 ft). Chambers: 4. Country: Ukraine. Status: Out of Production.

4 nozzles, maximum 42 degree gimbal angle.

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