Design Project 21900 icebreaker

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general characteristics

project 21900 icebreakers moskva , sankt-peterburg 114 metres (374 ft) long overall , have moulded breadth of 27.5 metres (90 ft). while project 21900m icebreakers vladivostok, murmansk , novorossiysk longer @ 119.8 metres (393 ft), have same beam same design draught, 8.5 metres (28 ft), corresponds displacement of 10,000 tons. general layout of vessels similar, largest difference being helideck, in project 21900 icebreakers located behind superstructure , in project 21900m icebreakers on forecastle.


power , propulsion

both project 21900 , 21900m icebreakers feature diesel-electric power plant , propulsion system consisting of 2 steerprop z-drive azimuth thrusters stainless steel propellers. however, while first 2 icebreakers of series powered 4 nine-cylinder wärtsilä 9l32 medium-speed generating sets output of 4,500 kw (6,000 hp) each, 3 newer vessels have more powerful twelve-cylinder wärtsilä 12v32 main engines produce 6,720 kilowatts (9,010 hp) per generating set.


the pushing-type propulsion units in moskva , sankt-peterburg each driven 2 4,100 kw (5,500 hp) alconza electric motors in tandem, resulting in total shaft output of 16,400 kw (22,000 hp). in vladivostok, murmansk , novorossiysk, propulsion units of pulling type, meaning propeller facing forward, , 4 propulsion motors rated 4,500 kw (6,000 hp) each. despite having higher propulsion power of 18,000 kw (24,000 hp), newer icebreakers referred 16-megawatt icebreakers .


in addition main propulsion units, icebreakers of series have transverse bow thruster maneuvering @ port.








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