sapwood ss-6 8k71ps

colspan="3" \| Sapwood SS-6 8K71PS
colspan="3" align="center" \|
align="left" valign="top" colspan="2" \| Stages	1 1/2
align="left" valign="top" \| 0 - Strap-on Boosters	align="right" valign="top" \| Engines	4 x RD-107
align="right" valign="top" colspan="2" \| Thrust	4 x 99,000 kgf = 396 Mgf (3.89 MN)
align="right" valign="top" colspan="2" \| Burn time	118 seconds
align="right" valign="top" colspan="2" \| Fuels	LOX/kerosene
align="left" valign="top" \| 1 - Core Stage	align="right" valign="top" \| Engines	1 x RD-108
align="right" valign="top" colspan="2" \| Thrust	912 kN
align="right" valign="top" colspan="2" \| Burn time	301 seconds
align="right" valign="top" colspan="2" \| Fuels	LOX/kerosene
align="right" valign="top" colspan="2" \| Launch Vehicle	1st Launch October 4, 1957
align="left" valign="top" colspan="2" \| Payload LEO 65-degree	500 kg

Sapwood SS-6 8K71PS was an ICBM used as a launch vehicle by the Soviet Union to launch Sputnik 1 and Sputnik 2. No other rocket stages were added to the ICBM to launch the satellites. The SS-6 8K71PS is essentially a modified R-7 ICBM. It was also known under the name "semiorka".

Sapwood SS-6 8K71PS specifications

Stage Number: 0 - Strap-on Boosters; 4 x 8K71K-0

Gross Mass: 43,300 kg
Empty Mass: 3,710 kg
Thrust (vac): 4 × 99,000 kgf = 396 Mgf (3.89 MN)
Isp: 313 kgf·s/kg (3.07 kN·s/kg)
Burn time: 118 s
Isp(sl): 256 kgf·s/kg (2.51 kN·s/kg)
Diameter: 2.68 m
Span: 9.76 m
Length: 19.00 m
Propellants: Lox/Kerosene
Engines: 1 x RD-107-8D74-1959 per booster = 4

Stage Number: 1 - Core stage; 1 x 8K71K-1

Gross Mass: 100,400 kg
Empty Mass: 6,800 kg
Thrust (vac): 912 kN
Isp: 315 kgf·s/kg (3.09 kN·s/kg)
Burn time: 301 s
Isp(sl): 248 kgf·s/kg (2.43 kN·s/kg)
Diameter: 2.99 m
Length: 28.00 m
Propellants: Lox/Kerosene
Engine: 1 x RD-108-8D75-1959

Total Mass: 267,000 kg
Total Liftoff Thrust: 3.89 MN

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