vostok rocket

colspan="3" \| Vostok 8K72K
colspan="3" align="center" \|
align="left" valign="top" colspan="2" \| Stages	3
align="left" valign="top" \| 0 - Strap-on Boosters	align="right" valign="top" \| Engines	4 x RD-107-8D74-1959
align="right" valign="top" colspan="2" \| Thrust	4 x 970.86 kN = 3,883.4 kN
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-108-8D75-1959
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="left" valign="top" \| 2 - Final Stage	align="right" valign="top" \| Engine	1 x RD-0109
align="right" valign="top" colspan="2" \| Thrust	54.5 kN
align="right" valign="top" colspan="2" \| Burn time	365 seconds
align="right" valign="top" colspan="2" \| Fuels	Lox/Kerosene
align="right" valign="top" colspan="2" \| Launch Vehicle	1st Launch December 22, 1960
align="left" valign="top" colspan="2" \| Payload LEO 65-deg	4,725 kg
align="left" valign="top" colspan="2" \| Payload Lunar probe	500 kg

The Vostok rocket (Russian Восток, translated as "East") was a derivative of the Soviet R-7 ICBM designed for the human spaceflight programme but later used for other satellite launches. The major versions of the rocket were:

8K72 - used to launch the early Luna spacecraft and the prototype Vostok spacecraft
8K72K - a refined version of the above. This was the version actually used for human spaceflight
8A92 - used for launching Zenit reconnaissance satellites throughout the 1960s
8A92M - modified version for launching Meteor weather satellites into high orbits.

On March 18, 1980 a Vostok-2M rocket exploded on its launch pad at Plesetsk during a fueling operation, killing 48. An investigation into a similar -- but avoided -- accident revealed that the substitution of lead-based for tin-based solder in hydrogen peroxide filters had resulted in the breakdown of the H₂O₂ and the resulting explosion.

Vostok 8K72K specifications

Stage Number: 0 - Strap-on Boosters; 4 x Vostok 8K72K-0

Gross Mass: 43,300 kg
Empty Mass: 3,710 kg
Thrust (vac): 4 x 99,000 kgf (971 kN) = 3.88 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: 8.35 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 Vostok 8K72K-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

Stage Number: 2 - Final stage; 1 x Vostok 8K72K-2

Gross Mass: 7,775 kg
Empty Mass: 1,440 kg
Thrust (vac): 54.5 kN
Isp: 326 kgf·s/kg (3.20 kN·s/kg)
Burn time: 365 s
Diameter: 2.56 m
Span: 2.56 m
Length: 2.84 m
Propellants: Lox/Kerosene
Engine: 1 x RD-0109

Vostok Rocket

Vostok 8K72K specifications

See also