Construction Begins in Italy on Fourth FREMM Frigate

By Keith Henderson at April 14, 2011 10:59
Filed Under: Company News, General

Construction of the fourth FREMM European multimission frigate has begun at Fincantieri's shipyard in Riva Trigoso, Sestri Levante, Italy. The Franco-Italian FREMM class frigate is currently the largest European naval shipbuilding program. Initially a purely French project when it was started 2002, Italy joined seven months later. There are three versions of the frigate, anti-submarine, anti-aircraft and a general purpose.

The Italian Navy plan ten ships built by Fincantieri: the French Navy plan to take a total of eleven ships, to be built by DCNS at Brest and at Toulon. The Moroccan Navy has ordered one frigate from DCNS for delivery in 2013. Despite the financial crisis, the Greek Navy has expressed interest for four FREMMs with an option for two more.

The ship length is 113 m, beam 19 m and displacement 5,600 tonnes. A CODLAG propulsion arrangement is powered by a single Avio licensed General Electric LM2500+G4 gas turbine of 35 MW and four  Isotta Fraschini VL 1716 C2ME diesel gensets each rated at 2,190 kW at 1,800 rpm. The French built FREMMs use four MTU 16V 4000 M63L diesel gensets each rated at 2,240 kW at 1,800 rpm.

The gearbox is a Renk design consisting of a cross-connect gear system, to split 35 MW gas turbine power equally between the two propellers. A cross connecting gear links each of the two propeller shafts. Each propeller shaft has one electric motor and supplies power either individually at cruising speed with clutches disconnected or connected to the gas turbine with the clutches engaged for full speed. Under diesel electric power the maximum speed is 15 kn and when combined with the gas turbine 28 kn.

Photo of a CODLAG gearbox for the Italian-French FREMM Class Frigate
Photo Credit: Renk AG

 

Drawing of the CODLAG propulsion arrangement of the French-Italian FREMM Class Frigate
Image Credit: Renk AG

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