MR-UR-100 Sotka

MR UR- 100 is the GRAU index for nuclear intercontinental ballistic missile with multiple warheads, which was developed in the Soviet Union. The NATO reporting name is SS -17 Spanker. The index system of the Russian armed forces is RS -16A Sotka.

Development

The SS -17 Spanker emerged as a successor system of the SS -11 Sego. The SS -17 was introduced in 1975 in the Soviet missile forces. The new system was designed to combat bunkered targets such as missile silos and command bunkers. 150 systems were prepared. All missiles were stationed in the former SS -11 silos. Because the MR UR -100 missiles were longer than their predecessors, their top could be folded to the side. Immediately before the start of the missile tip was erected.

Technology

All versions were two-stage rocket with liquid engine. The RS -16 as the R -36M, used as fuel, the storable liquid propellants UDMH and nitrogen tetroxide. The warheads were mounted on a so-called Post- Boost Vehicle ( PBV ). The control of the SS -17 was carried out by an inertial navigation platform. It has achieved an accuracy (CEP ) of 400 m.

The SS -17 was the first of its kind, the "cold" start method applied. In this starting process, the missile is shot by compressed air from the silo. The rocket motor ignites only outside the silo. Through this starting method fuel is saved and avoided damage to the silo.

Status

In 1986, SS -17 in the room Kostroma and stationed at Osjorny ( Jedrowo ). The last system was retired in 1997.

Technical data of the SS -17 Spanker

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