The UR-100 ( Russian : УР-100 ) was an intercontinental ballistic missile (ICBM) developed and deployed by the Soviet Union from 1966 to 1996. UR ( УР ) in its designation stood for Universal Rocket (Russian: Универсальная Ракета ). It was known during the Cold War by the NATO reporting name SS-11 Sego and internally by the GRAU index 8K84 . The Strela and Rokot carrier rockets were based on it.
6-515: The similar designation UR-100MR (Russian: УР-100МР ) actually refers to an entirely different missile, the MR-UR-100 Sotka (SS-17 Spanker) . The UR-100 was a two-stage liquid-propellant lightweight ICBM. Initial versions carried a single warhead of 0.5 to 1.1 Mt yield , while later versions could carry three or six MIRV warheads. The missile was silo-launched. 15P784 silo design (by KBOM, Design Bureau of Common Machinery , of V.P.Barmin)
12-405: Is a stub . You can help Misplaced Pages by expanding it . This Russian military article is a stub . You can help Misplaced Pages by expanding it . SS-17 Spanker First Stage : 1x RD-268 main engine + 1x RD-863 (15D167) engine Second Stage : 1x RD-862 (15D169) engine The MR-UR-100 Sotka was a MIRV -warhead intercontinental ballistic missile (ICBM) developed and deployed by
18-744: The Soviet Union from 1978 to 1993. The missile was given the NATO reporting name SS-17 Spanker and was built under the Soviet industry designation 15A15 . An alternative designation for the missile is the UR-100MR . OKB-586 developed the MR-UR-100 project. The purpose was to develop a MIRV capable replacement for the existing UR-100 missiles in service. While designed to fit into existing UR-100 silos, it still required some modification of existing silos to accommodate
24-534: The new missile, due to its requirement for a cold launch system. The development of "modernized UR-100 " was authorized on 19 August 1970 (document No.682-218) and assigned to both OKB-586 and TsKBM (builder of UR-100 ). The design bureau conducted flight tests from 1971 through 1974. Deployment commenced in December 1978. The more advanced MR-UR-100UTTh version began development in 1979, with flight tests from 1977 through 1979. The new missiles had completely replaced
30-558: The original version by 1983, at which time the Soviets fielded 270 launchers. From there the number of launchers declined, and by the 1991 START I Treaty they were down to 76. All were scheduled for dismantling and removed from the inventory. In the historical fiction novel The Third World War , written by General Sir John Hackett , a warhead from a MR-UR-100 detonates 3500m above Birmingham, England at 10:30 hours GMT on 20 August 1985. The explosion kills 300,000 people within minutes, with
36-496: Was greatly simplified in comparison to earlier missiles. Facilities consisted of hardened, unstaffed silos controlled by a single central command post. This was the first soviet ICBM (8K84M, entered service on 3 October 1971) equipped with missile defense countermeasure "Palma" by NII-108 of V.Gerasimenko. Formations included: The Strela and Rokot carrier rockets are based on the UR-100. This article relating to missiles
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