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17D61
Melnikov N2O4/UDMH rocket engine. Ikar stage 4 for Soyuz-Ikar. Design 1999. Derived from propulsion module of Yantar spy satellite, with over 30 flights to 1998. Increased versatility compared to Block L due to capability for 50 restarts.

Status: Design 1999. Thrust: 2.94 kN (662 lbf). Unfuelled mass: 820 kg (1,800 lb). Specific impulse: 326 s. Burn time: 600 s. Height: 2.56 m (8.39 ft). Diameter: 2.72 m (8.92 ft).

Engine thrusts: 1 x 2943 N + 4 x 110 N + 4 x 52 N + 8 x 5.88 N.

Chambers: 1 + 4 + 4 + 8. Engine: 820 kg (1,800 lb). Chamber Pressure: 9.00 bar. Thrust to Weight Ratio: .36. Restarts: 50.



Family: Storable liquid. People: Melnikov. Country: Russia. Launch Vehicles: Soyuz 11A511U / Ikar. Propellants: N2O4/UDMH. Stages: Ikar stage. Bibliography: 345, 346, 69.

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