This page no longer updated from 31 October 2001. Latest version can be found at S5.3

Other Designations: S5.3. Designer: Isayev. Developed in: 1958-63. Application: R-21 (SS-N-5). Propellants: Nitric acid/Amine Thrust(vac): 40,000 kgf. Thrust(vac): 392.00 kN. Chambers: 4. Country: Russia. Status: Out of Production. References: 319 , 344 . Comments: First engine to start underwater. 392 kN sea-level.
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Last update 12 March 2001.
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© Mark Wade, 2001 .