Yankee project 667A
There were 34 units made from 1968 onwards. They were the first soviet subs to have comparable firepower to American ballistic missile subs. They were armed with 16 missile tubes loaded with SS-N-6 Serb missiles. It required 27 minutes to launch all 16 missiles but they could do it on the move and as deep as 165 ft. The very front tip end of the sail had a hatch that opened and allowed a telescoping satelite antenna to be deployed called by NATO as "Cod Eye". Maximum speed submerged was 27 knots and they were armed with a unusual mix of torpedo tube sizes. It had 4 533mm(21") and 2 400mm(15.75") torpedo tubes. One boat, K-219 suffered an explosion and fire that killed four men when liquid rocket fuel leaked into the boat with bad results.
Yankee II project 667AM was a one boat series that replaced the liquid fueled missiles with solid fueled SS-N-17 missiles but it was not repeated. All boats were powered by twin PWR reactors and twin shafts.

The damaged K-219






There were 34 units made from 1968 onwards. They were the first soviet subs to have comparable firepower to American ballistic missile subs. They were armed with 16 missile tubes loaded with SS-N-6 Serb missiles. It required 27 minutes to launch all 16 missiles but they could do it on the move and as deep as 165 ft. The very front tip end of the sail had a hatch that opened and allowed a telescoping satelite antenna to be deployed called by NATO as "Cod Eye". Maximum speed submerged was 27 knots and they were armed with a unusual mix of torpedo tube sizes. It had 4 533mm(21") and 2 400mm(15.75") torpedo tubes. One boat, K-219 suffered an explosion and fire that killed four men when liquid rocket fuel leaked into the boat with bad results.
Yankee II project 667AM was a one boat series that replaced the liquid fueled missiles with solid fueled SS-N-17 missiles but it was not repeated. All boats were powered by twin PWR reactors and twin shafts.
The damaged K-219


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