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Proton K-2
Part of Monoblock UR-500-2
Proton K stage 2.
 AKA: 8S811K.  Status: Active. Thrust: 2,399.22 kN (539,365 lbf). Gross mass: 167,828 kg (369,997 lb). Unfuelled mass: 11,715 kg (25,827 lb). Specific impulse: 327 s. Specific impulse sea level: 230 s. Burn time: 206 s. Height: 14.00 m (45.00 ft). Diameter: 4.15 m (13.61 ft). Span: 4.15 m (13.61 ft). 
Cost $ : 5.000 million. No Engines: 4. 
Country: 
Russia. 
Engines: 
RD-0210, 
RD-0211. 
Launch Vehicles: 
UR-200, 
Proton-K, 
Proton-K/D, 
Proton-K/DM, 
Proton-K/D-1, 
Proton-K/DM-2, 
Proton-K/DM-2 DM1, 
Proton-K/D-2, 
Proton-K/DM-2M, 
Proton-K/17S40 DM2, 
Proton/Briz K/M, 
Proton-K/DM-2M DM4, 
Proton-M/Briz-M. 
Propellants: 
N2O4/UDMH. 
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