UR-100NU 15A35

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UR-100NU 15A35

Part of UR-100N

Russian intercontinental ballistic missile. Development of an improved version of the UR-100N was authorized on 16 April 1976 (UR-100NU; U = UTTKh = 'Improved Technical-Tactical Characteristics). Viktor Bugaisk at TsKBM headed the engineering team. The UR-100NU was to have a new warhead dispenser bus and improved guidance system by Vladimir Sergeyev of NII-692. The new system allowed up to six pre-programmed targets to be entered, any one of which could be selected at launch. This allowed deployment of better countermeasures and a considerable improvement in accuracy.

AKA: 15A35;15P035;RS-18B;SS-19 Mod 3;Stilleto;UR-100NU;UR-100NUTTKh. Status: Active. First Launch: 1977-10-26. Last Launch: 2018-12-26. Number: 88 . Payload: 4,350 kg (9,590 lb). Thrust: 1,870.00 kN (420,390 lbf). Gross mass: 105,600 kg (232,800 lb). Height: 24.30 m (79.70 ft). Diameter: 2.50 m (8.20 ft). Span: 2.50 m (8.20 ft). Apogee: 1,000 km (600 mi).

A total of 68 test flights were conducted from 28 September 1977 to 26 July 1979. The missile was accepted for service on 17 December 1980. The first regiment was activated at Khmelnitskiy on 6 November 1979 and became operational in January 1981. By 1984 the UR-100NU had been placed in a total of 360 silos at Kozelsk (70), Pervomaisk (90), Khmelnitskiy (90) and Tatishchevo (110). Eventually all 360 silos were converted to the 'superhardened' standard. Production of the missile itself ended at Khrunichev in 1985 and this was the last ICBM built by the factory.

The silos at Kozelsk and Tatishchevo had been fitted with the final UR-100 series missile modification in 1988-1990 (under the SALT-2 treaty the number of warheads per missile was reduced from six to one). Tatishchevo was also the site of several service and exercise field launches. The purpose of these was to verify the guidance software's ballistic solution when fired from launch sites and impact zones other than the standard Baikonur/Kamchatka range. By 1999 the UR-100NU had been fired 81 times -- 27 trials launches, 25 operational exercises, and 29 for other purposes.

Surplus UR-100NU missiles were the subject of vigorous marketing as space launchers during the 1990's. Concepts promoted included:

Rokot, consisting of the UR-100NU plus a 'Briz' upper stage. This actually flew several times.
Okean, a sea-launched variant
Strela, using the basic UR-100NU as a space launcher
Prizyv, a global rapid rescue system proposed by NPO Mashinostroyenia and NIIMash. This envisioned SLA-1 and SLA-2 winged rescue flight vehicles to deliver supplies anywhere on earth within 15 to 180 minutes. The gliders would land 420 to 2500 kg of supplies anywhere on the planet to within 20 to 30 m of the aim point. This looked very much like a civilian version of Chelomei's 'Raketoplan' concept of the 1960's, focused on attack on the US fleet. Perhaps it had remained on back-burner development all those years…

Maximum range: 10,000 km (6,000 mi). Number Standard Warheads: 6. Warhead yield: 550 KT. CEP: 0.31 km (0.19 mi). Boost Propulsion: Storable liquid rocket. Initial Operational Capability: 1980.

Family: ICBM. Country: Russia. Launch Sites: Baikonur, Tatishchevo, Baikonur LC132, Baikonur LC175/2. Stages: UR-100N Stage 1N, UR-100N Stage 2N, UR-100N MIRV Bus. Agency: Chelomei bureau.

1977 October 26 - . Launch Site: Baikonur. LV Family: UR-100N. Launch Vehicle: UR-100NU 15A35.

First UR-100NU launch. Joint flight trials launch. - . Nation: Russia. Agency: RVSN. Apogee: 1,000 km (600 mi).

1977 December 1 - . Launch Site: Baikonur. LV Family: UR-100N. Launch Vehicle: UR-100NU 15A35.

Joint flight trials launch - . Nation: Russia. Agency: RVSN. Apogee: 1,000 km (600 mi).