|This article needs additional citations for verification. (December 2009) (Learn how and when to remove this template message)|
|Country of origin||USSR|
|Payload to LEO||4,730 kilograms (10,430 lb)|
|Launch sites||Baikonur Site 1/5 & 31/6
Plesetsk Site 41/1
|First flight||1 June 1962|
|Last flight||12 May 1967|
|Thrust||995.3 kilonewtons (223,800 lbf)|
|Burn time||118 seconds|
|Thrust||940 kilonewtons (210,000 lbf)|
|Burn time||301 seconds|
|Burn time||365 seconds|
The Vostok-2 (Russian: Восток meaning "East"), GRAU index 8A92 was an expendable carrier rocket used by the Soviet Union between 1962 and 1967. Forty five were launched, of which five failed. It was derived from the earlier Vostok-K, with uprated engines. It was a member of the R-7 family of rockets.
The Vostok-2 made its maiden flight on 1 June 1962, from Site 1/5 at the Baikonur Cosmodrome. One of the booster engines failed 1.8 seconds after launch, and the rocket came down 300 metres (980 ft) away from the pad. The resulting explosion damaged the launch complex, and necessitated delays to several other launches that had been scheduled from that complex, including Vostok 3 and Vostok 4. Thirteen months later, on 10 July 1963, an almost identical failure occurred. The other three failures were caused by a second stage malfunction, a second stage guidance problem, and a problem with the first stage.
The Vostok-2 was used exclusively to launch Zenit-2 reconnaissance satellites. Launches occurred from sites 1/5 and 31/6 at Baikonur, and Site 41/1 at Plesetsk. In 1967, it was retired in favour of the Voskhod.
- Wade, Mark. "Soyuz". Encyclopedia Astronautica. Retrieved 2009-04-15.