SS-19 Stiletto

November 23, 2015 By Kristin Horitski



The Russian UR-100N / SS-19 Stiletto is a Soviet-made two-stage, liquid-propelled ICBM. Deployed beginning in 1975 to partially replace the SS-11 ICBM force, [1] the SS-19 is similar in design to the SS-11 Sego but with increased size and accuracy. The SS-19 is also similar to the Russian SS-18 Satan, as they use the same guidance and control systems, which permit remote monitoring and in-flight control of the missile. [2] The ignition system of the SS-19 is hot launched, meaning ignition of the main engine occurs while the missile is still in the silo.

There have been three deployed configurations of the SS-19: mod 1, mod 2, and mod 3. The SS-19 mod 1 is designed to carry up to six MIRVs and began deployment in 1975, with 60 launchers deployed by the end of the year. [3] After deployment, developers discovered problems with the accuracy of the missile and carried out modifications to correct the issue. [4] The SS-19 mod 2 varies from the mod 1 in that it is configured to carry only a single warhead with a yield between 2.5 and 5 MT. The mod 2 is still operational today, but plans call for the remaining missiles to be removed from service between 2015-2020. [5] The SS-19 mod 3 is an improved version of the mod 1 and features upgraded engines and command and control modifications. [6]



[1] “UR-100N / SS-19 STILLETO.” Federation of American Scientists. Last updated July 29, 2000.

[2] Ibid.

[3] Ibid.

[4] Ibid.

[5] “RS-18 MOD 1/-MOD 2 (SS-19).” Missile Threat. Last updated December 5, 2012.

[6] “UR-100N / SS-19 STILLETO.” Federation of American Scientists. Last updated July 29, 2000.

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