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UR-500-2
Part of Monoblock UR-500-2 Family
N2O4/UDMH propellant rocket stage. Proton UR-500 second stage. Flew only on two-stage version of Proton. Empty mass is correct; all other values estimated based on UR-500 Stage 2 original design and UR-500K stage 2 figures.

AKA: Proton-2. Status: Retired 1966. Thrust: 2,399.19 kN (539,359 lbf). Gross mass: 134,900 kg (297,400 lb). Unfuelled mass: 13,180 kg (29,050 lb). Specific impulse: 325 s. Burn time: 160 s. Height: 10.90 m (35.70 ft). Diameter: 4.15 m (13.61 ft). Span: 4.15 m (13.61 ft).

No Engines: 4.



Country: Russia. Engines: RD-0210. Launch Vehicles: UR-500. Propellants: N2O4/UDMH.

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