Triode
Posts: 283
Joined: 9/26/2014 Status: offline
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news from Russia According to director of SRZ "Nerpa" Arkady Oganyan http://www.redstar.ru/images/files/regions2015/1809_1/180915-na-s-z.pdf page 3 in russian before the end of this year "Nerpa" transfer to Navy two nuclear subs , K-335 "Gepard"(pr.9711 mistakenly known as 971M) and B-336 "Pskov" (pr.945A) also according to VPK magazine http://vpk-news.ru/news/25314 in russian and Russian MoD site http://structure.mil.ru/structure/forces/navy/news/more.htm?id=12036524@egNews in russian before the end of this year DVZ "Zvezda" transfer to Navy two nuclear subs , K-331 "Magadan" (pr 9710 aka Akula) and K-419 "Kuzbass"(pr971 aka Improved Akula) what is interesting is modernization that submarines receive As example, B-335 "Pskov" is first from pr.945/945A recive 945M upgrade ,sonar system MGK-540M "Kizhuch-945M" instead of MGK-540 "Skat-3",Kalibr-PL complex and UGST torpedoes K-331 "Magadan" and K-419 "Kuzbass" recive 971M upgrade, sonar system MGK-540M "Kizhuch-971M" instead of MGK-540 "Skat-3", Kalibr and UGST torpedoes both K-331 and K-419 now 971M ,but also there is difrences between them, K-331 built according to VAH-74 (Vibro-Accoustic Characteristics Demands-74) ,K-419 built by VAH-80 (and FYI about diffrences in pr971 subs: K-157 "Vepr" built by VAH-80, have SAG -system of active suppression of noise in the range of 50-500 Hz ,and K-335"Gepard" built by VAH-80 ,have SAG and longer improved TASS) So, even if they both now 971M ,Improved Akula still better than Akula Info about upgrades from annual report of Taganrog Plant "Priboi" http://disclosure.1prime.ru/Portal/GetDocument.aspx?emId=6154093944&docId=bd47e1d1ed2046d6808349d3e9cc21a4 p.23-32 in russian state contract 31401544741 (DVZ "Zvezda" buying MGK-540M for K-331 "Magadan" ) http://www.my-tender.ru/#!/tenders223/31401544741 in russian K-335 "Gepard" does not recive 971M upgrade , only new Kalibr-PL missiles and UGST torpedoes "Gepard" already have improved MGK-540 (early version of MGK-540M), sometimes because of that called pr.971M, but project number for "Gepard" is 9711, Upgrade 971M is atempt to make other 971 as good as "Gepard" So before the end of this year we could see significant improvments in ranks of Russian Navy submarines It is possible that 971M upgrade includes not only MGK-540M installation. P.S. about differences between VAH-74 and VAH-80 for pr.971, from magazine "Sudostroenie"("Shipbuilding") №1, 1998: "In June, it passed the technical review of the project in 1 CNII MoD(Navy shipbuilding). Since that time, most disagreements on the draft had been settled, the discussion went on a normal working order. However, 1 CNII MoD suddenly required to reduce the noise level specification for submarine more than doubled, proving it a large number of implemented projects and reserves laid down in terms of noise. Note has been formulated as an ultimatum, otherwise the project is not recommended for approval. Chief designer, discussed these requirements with the Krylov Shipbuilding Research Institute and other industry organizations, has agreed to accept them. The concession was a very serious, as the number of frequency requirements on noise were tightened by 8-10 dB."
< Message edited by Triode -- 11/1/2015 10:45:03 PM >
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