Zenit-2

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This article is about the rocket, for the satellite, see Zenit (satellite)
Zenit-2
Zenit-2 rocket ready for launch.jpg
Zenit-2 at Site 45/1
Function Carrier rocket
Manufacturer Yuzhnoye
Country of origin Soviet Union

(Ukraine)

Size
Height 57 metres (187 ft)
Diameter 3.9 metres (13 ft)
Mass 444,900 kilograms (980,800 lb)
Stages Two
Capacity
Payload to
LEO
13,740 kilograms (30,290 lb)
Payload to
SSO
5,000 kilograms (11,000 lb)
Associated rockets
Family Zenit
Derivatives Zenit-2M
Zenit-3SL
Launch history
Launch sites Baikonur Site 45
Total launches 37
Successes 31
Failures 6
First flight 13 April 1985
First Stage
Engines 1 RD-171
Thrust 8,180 kilonewtons (1,840,000 lbf)
Specific impulse 337 sec
Burn time 150 seconds
Fuel RP-1/LOX
Second Stage
Engines 1 RD-120
1 RD-8
Thrust 912 kilonewtons (205,000 lbf)
79.5 kilonewtons (17,900 lbf)
Specific impulse 349 sec
Burn time 315 seconds
Fuel RP-1/LOX

The Zenit-2 is a Ukrainian, previously Soviet, expendable carrier rocket. First flown in 1985, it has been launched 37 times, with six failures. It is a member of the Zenit family of rockets, and was designed by the Yuzhnoye Design Bureau. A modified version, the Zenit-2S, is used as the first two stages of the Sea Launch Zenit-3SL rocket.[1] Launches of Zenit-2 rockets are conducted from Baikonur Cosmodrome Site 45/1. A second pad, 45/2, was also constructed, but was only used for two launches before being destroyed in an explosion.[2] A third pad, Site 35 at the Plesetsk Cosmodrome was never completed, and work was abandoned after the dissolution of the Soviet Union.[2]

The Zenit-2 is currently being replaced by the Zenit-2M, which incorporates enhancements made during the development of the Zenit-3SL, and it is unclear whether any remain to be launched. The Zenit-2 has a fairly low flight rate as the Russian government usually avoids flying national security payloads on Ukrainian rockets.

During the late 1990s, the Zenit-2 was marketed for commercial launches. Only one such launch was conducted, with a group of Globalstar satellites, which ended in failure after a computer error resulted in the premature cutoff of the second stage.

References[edit]

  1. ^ "The Rocket - Zenit-3SL". Sea Launch. Retrieved 2009-04-14. 
  2. ^ a b Wade, Mark. "Zenit". Encyclopedia Astronautica. Retrieved 2009-04-14.