Launch of Russian Project 21630 Buyan Class Corvette

By Keith Henderson at May 01, 2012 07:33
Filed Under: Company News, Navy News

Last week saw the launching of the Russian corvette Makhachkala at the JSC Almaz Shipbuilding, St Petersburg. She is the third of class to be built by Almaz and will be joining sister ships Astrakhan and Kaspiysk commissioned in 2006 and 2011 respectively in the Caspian Flotilla. Project 21630 Buyan class was designed by Zelenodolsk Design Bureau, Tatarstan, Russia for coastal defense and engagement with surface warships . A later missile version of this class, of which three are planned, called the Buyan-M, is under construction at the Zelenodolsk Shipyard.

Caption: First of class Astrakhan presently in service with the Caspian Flotilla
Image Credit: Wikipaedia

The 550 t displacement corvette has an LOA of 203 ft (62 m), beam of 31 ft (9.6 m) and 7 ft (2 m) draft. The propulsion system is a twin screw CODAD (combined operation diesel and diesel) arrangement. This comprises two Zvezda M520 radial 56 cylinder diesel engines. Each of the two diesel engines has a bore and stroke of 160 x 170 mm and output power of 3,970 kW (5,323 hp) at 2,000 rpm.

The remarkable and unique Zvezda radial engine is made up of seven banks of eight cylinders with just over 51 degrees between banks. Boost pressure is provided by a crankshaft driven supercharger with water cooled intercooler. It is very light through the considerable use of aluminum castings in its construction.


Caption: Photograph of the M520 engine with power output of 3,970 kW (5,323 hp).
Image Credit: Zvezda

Comments (1) -


Interesting engine, setting the rack and adjusting valves on a 12-71DD seems so much easier now.

Mike |     5/3/2012 8:08:09 AM #

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