Encyclopedia Astronautica
UR-100U


Russian intercontinental ballistic missile. The UR-100U was a development of the UR-100K with improved shock isolation in the silo.

A competition for an improved silo design was held in 1969 and won by Vladimir Baryshev's team at OKB-52 Filial 2. Tests began in this period of improved silo designs at the Semipalatinsk nuclear proving ground. These improvements included plastic shock absorbers to isolate the missile from blast, shielded command antennae, and 'cold absorbers' that could absorb the heat of nearby nuclear explosions. The resulting silo/container was the subject of 15 new patents and was considered by the Americans as the most blast-resistant in the world. Flight trials were conducted from 1 June 1971 to January 1973. The missile was accepted by the military on 26 September 1974 and finally retired in 1993. In service a regiment consisted of a control point and ten silos. By 1987 440 UR-100K and UR-100U's had been deployed to missiles fields at Kozelsk, Teikovo, Bershet, Gladkaya, Drovyanaya, Svobodniy, and Yasnaya. Of these a total of 120 were in silos re built to the new design. These were later filled with UR-100N and UR-100NU missiles before being retired in the 1990's.

Standard warhead: 1,208 kg (2,663 lb). Maximum range: 10,600 km (6,500 mi). Number Standard Warheads: 3. Standard RV: MRV. Warhead yield: 350 KT. CEP: 1.09 km (0.67 mi). Alternate warhead: 1,200 kg (2,600 lb). Maximum range with alternate warhead: 12,000 km (7,000 mi). Number Alternate Warheads: 1. Alternate warhead yield: 1,300 KT. Alternate warhead CEP: 1.09 km (0.67 mi). Boost Propulsion: Storable liquid rocket, N2O4/UDMH. Initial Operational Capability: 1972. Total Number Built: 220.

AKA: RS-10MUTTKh; UR-100U; SS-11 Mod.4; 15A20U; Sego; 15P020.
Gross mass: 50,100 kg (110,400 lb).
Payload: 1,208 kg (2,663 lb).
Height: 18.95 m (62.17 ft).
Diameter: 2.00 m (6.50 ft).
Span: 2.00 m (6.50 ft).
Apogee: 1,000 km (600 mi).
First Launch: 1971.01.01.
Last Launch: 1976.01.01.
Number: 20 .

More... - Chronology...


Associated Countries
See also
  • UR-100 The UR-100 lightweight ICBM was the Soviet answer to the US Minuteman and was deployed in larger numbers than any other in history. It remained an enigma outside of intelligence circles in the West until after the collapse of the Soviet Union. It allowed the Soviet Union to match, and then surpass the United States in strategic deterrent capability. As such it was Vladimir Chelomei's crowning legacy to his country. More...
  • missile Guided self-propelled military weapon (as opposed to rocket, an unguided self-propelled weapon). More...

Associated Manufacturers and Agencies
  • Chelomei Russian manufacturer of rockets, spacecraft, and rocket engines. Chelomei Design Bureau, Reutov, Russia. More...

Associated Launch Sites
  • Baikonur Russia's largest cosmodrome, the only one used for manned launches and with facilities for the larger Proton, N1, and Energia launch vehicles. The spaceport ended up on foreign soil after the break-up of Soviet Union. The official designations NIIP-5 and GIK-5 are used in official Soviet histories. It was also universally referred to as Tyuratam by both Soviet military staff and engineers, and the US intelligence agencies. Since the dissolution of the Soviet Union the Russian Federation has insisted on continued use of the old Soviet 'public' name of Baikonur. In its Kazakh (Kazak) version this is rendered Baykonur. More...

Associated Stages
  • 8S816 N2O4/UDMH propellant rocket stage. Loaded/empty mass 32,799/3,000 kg. Thrust 868.80 kN. Vacuum specific impulse 310 seconds. Orevo has sectioned hardware. Total mass, sea level thrust accurate; Isp, empty mass and burn time estimated. Source: Placard, Orevo. More...
  • 8S817 N2O4/UDMH propellant rocket stage. Loaded/empty mass 8,611/900 kg. Thrust 131.45 kN. Vacuum specific impulse 325 seconds. Orevo has sectioned hardware. Total mass, thrust accurate; Isp, empty mass and burn time estimated. Source: Placard, Orevo. More...

UR-100U Chronology


1971 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1971 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1971 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1971 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1971 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1971 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1971 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1971 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1971 June 16 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • Phase 1 state trials flight - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1972 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1972 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1972 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1972 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1972 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1972 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1972 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1972 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1972 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1973 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • SLI missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1976 - . Launch Site: Baikonur. LV Family: UR-100. Launch Vehicle: UR-100U.
  • Operational missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

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