World Library  
Flag as Inappropriate
Email this Article


Article Id: WHEBN0003100120
Reproduction Date:

Title: Ur-200  
Author: World Heritage Encyclopedia
Language: English
Subject: Universal Rocket, Polyot (rocket), UR-100, UR-100N, List of missiles by country
Publisher: World Heritage Encyclopedia


SS-10 Scrag
Type Intercontinental ballistic missile
Place of origin  Soviet Union
Service history
In service 1963-1964
Production history
Designer OKB-52
Designed 1962
Specifications (8K81[1])
Weight 135,710 kg (299,190 lb)
Height 34.65 m (113.7 ft)
Diameter 3 m (9.8 ft)
Warhead Nuclear warhead

Engine First stage, RD-0202 liquid-fuel rocket
Second stage, RD-0205 liquid-fuel rocket
First stage, 2,236 kN (503,000 lbf)[2]
Second stage, 606.4 kN (136,300 lbf)[3]
Wingspan 4.2 m (14 ft)
Propellant N2O4/UDMH
12,000 kilometres (7,500 mi)
Flight ceiling 185 km (115 mi) apogee
Speed Mach Mach 20 (24,500 km/h; 15,220 mph; 6.806 km/s)

The UR-200 was an intercontinental ballistic missile (ICBM) developed by OKB-52 of Vladimir Nikolaevich Chelomey in the Soviet Union. It was known during the Cold War by the NATO reporting name SS-10 Scrag and internally by the GRAU index 8K81. The design was authorized by the Decisions of the Central Committee of the CPSU of March 16 and August 1, 1961, and the draft project was finished in July 1962. It first flew on November 4, 1963 from the Baikonur Cosmodrome. The ninth and final flight was conducted on October 20, 1964.


The UR-200 was a two-stage liquid-propellant universal ICBM for delivery of replaceable payloads to the range up to 12000 km, launch of interceptor satellites for space defense, naval recon satellites, and orbital maneuvering warheads. It was capable of carrying around 3,175 kilograms (7,000 lb) of payload, and could be launched from flat pads, or missile silos built for the R-16 missile. Unusually for a Soviet missile, the first stage provided attitude control by means of thrust vectoring. Nitrogen tetroxide and UDMH were used as propellants.


The FOBS, or Fractional Orbital Bombardment System, was a Soviet programme to place a nuclear warhead into a 150 km low Earth orbit, in order to allow the warhead to approach the enemy from any direction, below missile tracking radar systems. The UR-200 was one of several rockets proposed for this purpose, along with the 8K713 and R-36. The use of the UR-200 for FOBS deployment was cancelled in October 1964, when Nikita Khrushchev was removed from power.

Operational history

The UR-200 was never deployed operationally. The successful development of the storable hypergolic-fuelled R-36 silo-launched missile led to the cancellation of the UR-200 in 1965.


Related developments

See also


  1. ^ UR-200. Encyclopedia Astronautica. Accessed 2014-09-28.
  2. ^ RD-0202. Encyclopedia Astronautica. Accessed 2014-09-28.
  3. ^ RD-0205. Encyclopedia Astronautica. Accessed 2014-09-28.

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.