Sputnik 8K71PS/8A91 (1957-58)
First Flight: 1957
Last Flight: 1958
Stages: 1 + Boosters
Total Mass: 8K71PS = 267 tons; 8A91 = 269.3 tons
Payload Mass: 8K71PS = 500 kg to LEO; 8A91 = 1327 kg to LEO
Diameter: ?
Length: ?
Booster Stage
Type: Strap-on Boosters
Arrangement: 8K71PS = 4 x RD-107-8D74PS; 8A91 = 4 x RD-107-8D76
Thrust (kN): 3890
Propellant: LOX/RP-1
ISP: 8K71PS = 306 s; 8A91 = 310 s
ISP (sea level): 8K71PS = 250 s; 8A91 = 252 s
Burn Time: 8K71PS = 120 s; 8A91 = 130 s
Gross Mass: 172 tons
First Stage
Type: Core
Arrangement: 8K71PS = 1 x RD-108-8D75PS; 8A91 = 1 x RD-108-8D77
Thrust (kN): 8K71PS = 970; 8A91 = 804 (?)
Propellant: LOX/RP-1
ISP: 8K71PS = 308 s; 8A91 = 315 s
ISP (sea level): 8K71PS = 241 s; 8A91 = 246 s
Burn Time: 8K71PS = 310 s; 8A91 = 360 s
Gross Mass: 8K71PS = 94 tons; 8A91 = 95 tons
Empty Mass: 7.495 tons