Development
Development work began at NII Mashinostroyeniya in 1971 and the design gained official approval in 1973. Initial test flights from 1979 found problems in the solid-fuel boost engines, over half of the early flights failed. Later tests aboard a modified Typhoon class submarine were more successful and deployment began in May 1983, with 20 missiles in each submarine. At full deployment, 120 missiles were deployed with 1,200 total warheads.
Under the terms of the Start I and Start II treaties, from 1996 a number of R-39 missiles were destroyed. Throughout the 1990s, Typhoon class submarines and the R-39 missiles they carried were gradually withdrawn from service. All the missiles were decommissioned by 2004 and all the Typhoon class submarines have been retired, except for one which is to be used as a test platform for the next generation Bulava missile.
A successor design, R-39M Grom (Russian: Гром, Thunder)/RSM-52V/SS-N-28 for D-19UTTKh launch system, suffered a succession of testing failures and was cancelled.
Read more about this topic: R-39 Rif
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