R-7A Semyorka

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R-7A Semyorka
R-7 (7A) misil.svg
A 2-view diagram of the R-7A Semyorka, with parts of the R-7 shown for comparison.
FunctionICBM
Country of originUSSR
Associated rockets
Family R-7
Launch history
StatusRetired
Launch sites Baikonur Sites 1/5 and 31/6
Plesetsk Sites 41/1, 16/2, 43/3 & 4
Total launches28
Successes25
Failures3
First flight23 December 1959
Last flight25 July 1967

The R-7A Semyorka, GRAU index 8K74, was an early Soviet intercontinental ballistic missile derived from the earlier R-7 Semyorka. It was the only member of the R-7 family of rockets to be deployed as an operational missile. The R-7A first flew on 23 December 1959, entered service on 31 December of the same year, and was formally accepted on 20 January 1960. It was declared fully operational on 12 September 1960 and was retired from service in 1968.

Twenty eight test launches were conducted with three failures. [1] Most test launches occurred from Sites 1/5 and 31/6 at the Baikonur Cosmodrome. The main operational base for R-7A missiles was Plesetsk Cosmodrome, where four launch pads were used at Sites 41/1, 16/2, 43/3 and 43/4. Baikonur Site 31/6 was also used for operational missiles. Another base near Krasnoyarsk was proposed, but later cancelled.

The R-7A was designed to carry a nuclear warhead; however, there was only one occasion where a live warhead was loaded onto a missile, during the Cuban Missile Crisis. After the missile had been armed, it was rolled out to Site 41/1 at Plesetsk, and would have had a response time of 8-12 hours, should an order to launch it have been given. [2] In the event of nuclear war, other missiles would have been armed as required, in accordance with the Soviet policy of storing missiles and warheads separately.

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R-7 Semyorka Intercontinental ballistic missile


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Baikonur Cosmodrome Rocket launch complex in Kazakhstan, used by Russia

The Baikonur Cosmodrome is a spaceport located in an area of southern Kazakhstan leased to Russia.

Plesetsk Cosmodrome Russian spaceport

Plesetsk Cosmodrome is a Russian spaceport located in Mirny, Arkhangelsk Oblast, about 800 km north of Moscow and approximately 200 km south of Arkhangelsk, dates from 1957. Originally developed as an ICBM site for the R-7 missile, it also served for numerous satellite launches using the R-7 and other rockets. Its high latitude makes it useful only for certain types of launches, especially the Molniya orbits, so for much of the site's history it functioned as a secondary location, with most orbital launches taking place from Baikonur, in the Kazakh SSR. With the end of the Soviet Union, Baikonur became a foreign territory, and Kazakhstan charged $115 million usage fees annually. Consequently, Plesetsk has seen considerably more activity since the 2000s.

Nedelin catastrophe

The Nedelin catastrophe or Nedelin disaster was a launch pad accident that occurred on 24 October 1960 at Baikonur test range, during the development of the Soviet ICBM R-16. As a prototype of the missile was being prepared for a test flight, an explosion occurred when the second stage engine ignited accidentally, killing an unknown number of military and technical personnel working on the preparations. Despite the magnitude of the disaster, news of it was suppressed for many years and the Soviet government did not acknowledge the event until 1989. The disaster is named after Chief Marshal of Artillery Mitrofan Ivanovich Nedelin, who was killed in the explosion. As commanding officer of the Soviet Union's Strategic Rocket Forces, Nedelin was head of the R-16 development program.

Strategic Missile Forces

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The R-16 was the first successful intercontinental ballistic missile deployed by the Soviet Union. In the West it was known by the NATO reporting name SS-7 Saddler, and within Russia, it carried the GRAU index 8K64.

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RT-2PM Topol intercontinental ballistic missile

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R-9 Desna 1964 intercontinental ballistic missile of the Soviet Strategic Rocket Forces

The R-9 was a two-stage ICBM of the Soviet Union, in service from 1964 to 1976.

R-14 Chusovaya 1960s theater ballistic missile of the Soviet Strategic Rocket Forces

The R-14 Chusovaya was a single stage Intermediate-range ballistic missile developed by the Soviet Union during the Cold War. It was given the NATO reporting name SS-5 Skean and was known by GRAU index 8K65. It was designed by Mikhail Yangel. Chusovaya is the name of a river in Russia. Line production was undertaken by Facility No. 1001 in Krasnoyarsk.

R-12 Dvina 1958 theater ballistic missile of the Soviet Rocket Forces

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Kura Missile Test Range

Kura Missile Test Range, originally known as Kama, is a Russian intercontinental ballistic missile impact area located in northern Kamchatka Krai in the Russian Far East. It is the destination for ballistic missiles which are test fired from other centers, and was chosen due to its remoteness and distance. It is 130 kilometers (81 mi) northeast of the settlement of Klyuchi and the military townlet is called Klyuchi-1, after the nearest settlement.

RS-24 Yars Russian MIRV-equipped, thermonuclear weapon intercontinental ballistic missile

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R-7 (rocket family) rocket family

The R-7 family of rockets is a series of rockets, derived from the Soviet R-7 Semyorka, the world's first ICBM. More R-7 rockets have been launched than any other family of large rockets.

Site 41, also known as Lesobaza and SK-1, was a launch complex at the Plesetsk Cosmodrome in Russia. It consisted of a single pad, Site 41/1, and was used by R-7 derived rockets between 1959 and 1989.

Site 16, also known as SK-2, is a launch complex at the Plesetsk Cosmodrome in Russia. It consists of a single pad, Site 16/2, and has been used by R-7 derived rockets since 1960.

Plesetsk Cosmodrome Site 43 launch site at Plesetsk Cosmodrome in northern Russia

Site 43, also known as SK-3 and SK-4, is a launch complex at the Plesetsk Cosmodrome in Russia. It consists of a two pads, Sites 43/3 and 43/4, and has been used by R-7 derived rockets since the early 1960s.

Baikonur Cosmodrome Site 41

Site 41 was a complex of three launch pads at the Baikonur Cosmodrome originally built for flight testing of Intercontinental ballistic missile (ICBMs) using storable propellant. The need to develop such missiles was determined by low-tactical-technical and operational characteristics of the first Soviet ICBM R-7 created by the OKB-1 under the guidance of Sergei Pavlovich Korolev. May 13, 1959 by a special decree of the Central Committee of the CPSU and the CM of the design Bureau «Yuzhnoye» assigned to develop an Intercontinental ballistic missile on storable components of propellant, which has received designation R-16 and index – 8К64. Together with 41 platform built platform No. 42 – technical and No. 43 – for residing of serving military personnel and representatives of the industry.

References

  1. McDowell, Jonathan. "R-7". Orbital and Suborbital Launch Database. Jonathan's Space Page. Retrieved 2009-03-06.
  2. Mark, Wade. "R-7A". Encyclopedia Astronautica. Retrieved 2016-10-14.