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Georges Leygues-class frigate

Class of destroyers in the French Navy

Summary

Class of destroyers in the French Navy

Field	Value
section1	{{Infobox ship/image
image	FS Montcalm 1.jpg
image_caption
section2	{{Infobox ship/class overview
name	Georges Leygues class
builders	Arsenal de Brest
operators
class_before
class_after	Aquitaine class (anti-submarine variant)
built_range	1974–1988
in_commission_range	1979 – 2022
total_ships_completed	7
total_ships_retired	7
section3	{{Infobox ship/characteristics
header_caption	(as built)
type	Frigate
displacement	*3550 t
*{{convert	4500	-	4580	t	LT	0	abbr	on}} full load
length	139 m
beam	14 m
draught	5.7 m
propulsion	*2 shafts; CODOG
* 2 × gas turbines, {{cvt	23100	shp	PS kW	0	lk	on}} each
* 2 × diesel engines, {{cvt	6400	PS	bhp kW	0	lk	on}} each
speed	30 kn
range	9500 nmi at 17 kn
armament	*4 x single MM38 Exocet anti-ship missiles
aircraft	2 × Westland Lynx helicopters
aircraft_facilities	Double hangar

4500 - full load
2 × gas turbines, 23100 shp each
2 × diesel engines, 6400 PS each
DRBV 51C search radar
DRBV 26 early-warning radar
DRBC 32E fire-control radar
DUBV 23B hull-mounted sonar
DUBV 43B variable depth sonar
2 × Syllex chaff launchers
2 × fixed torpedo tubes
1 × single 100 mm DP gun
2 × single 20 mm AA guns
1 × octuple Crotale anti-air missile launcher The Georges Leygues class (Type C70 AS or Type F70 AS) consisted of seven guided-missile destroyers built for the French Navy during the Cold War. They were multi-role ships due to their Exocet and Crotale missile armament, making them especially suitable for the defence of strategic positions, show of force operations, or as high seas escorts. The design was initially officially known as a "corvette" with the designation C70, but were internationally labelled an "anti-submarine destroyer" (hence the "D" in the hull numbers). Subsequently, the French referred to the ships as "frigates" with the designation F70.

Design and description

The Georges Leygues-class ships were designed as anti-submarine (ASW) escorts for the fleet. They had an overall length of 139 m, a beam of 14 m and a draught of 5.7 m. The ships had a standard displacement of 3830 t and 4500 - at full load. The Georges Leyguess' propulsion machinery used a CODOG configuration with one SEMT-Pielstick 16PA6-V280 diesel engine and a Rolls-Royce Olympus TM3B gas turbine were coupled to each of the two propeller shafts. The diesels were used for speeds under 21 kn and the gas turbines for sprints up to 30 kn. The diesels were rated at a total of 12800 PS and the turbines at a total of 46200 shp. The combination give the ships a range of 9500 nmi at 17 kn. The frigates had a complement of 216 sailors.

The primary anti-ship weapon of the Georges Leyguess consisted of four single box launchers for MM38 Exocet anti-ship missiles, located aft of the funnel with two launchers on each broadside. The frigates were designed with a single 100 mm Modèle 1968 dual-purpose gun in a single-gun turret forward of the superstructure. They were also equipped with two 20 mm guns. The ships were fitted with a octuple Crotale anti-aircraft missile launcher with 26 reloads located on the aft superstructure. The anti-submarine| (ASW) weapons of the Georges Leygues-class ships consisted of two torpedo launchers , one on each side of the ship. Each ship carried ten torpedoes. The ships were designed to carry helicopters, a pair of Westland Lynx ASW helicopters in a double hangar at the stern.

They were completed with a DRBV 51C search radar, a DRBC 32E fire-control radar and a DRBV 26 early-warning radar. For anti-submarine warfare, they were equipped with a DUBV 23B hull-mounted sonar and DUBV 43B towed variable depth sonar. For electronic defence, the vessels mounted two Syllex chaff launchers. The SENIT 4 tactical data system coordinated sensor data.

The superstructures were built to optimise resistance to the blast from nuclear explosions. The last three ships of the class had their bridges raised one deck to overcome problems experienced by the first four in bad weather, as well as being equipped with DSBV 61 passive linear towed array sonar and several other upgraded systems.

Portsmouth Naval Base]], UK, 21 September 2009.

Ships in class

Georges Leygues-class frigates	Name	Pennant number	Builder	Laid down	Launched	Commissioned	Decommissioned
{{ship	French frigate	Georges Leygues	2}}	D 640	Arsenal de Brest	16 September 1974	17 December 1976	10 December 1979	21 March 2014
{{ship	French frigate	Dupleix	2}}	D 641	17 October 1975	2 December 1978	13 June 1981	July 2015
{{ship	French frigate	Montcalm	2}}	D 642	5 December 1975	31 May 1980	28 May 1982	3 July 2017
{{ship	French frigate	Jean de Vienne	2}}	D 643	26 October 1979	17 November 1981	25 May 1984	9 January 2019
{{ship	French frigate	Primauguet	2}}	D 644	17 November 1981	17 March 1984	5 November 1986	1 April 2019
{{ship	French frigate	La Motte-Picquet	2}}	D 645	12 February 1982	6 February 1985	18 February 1988	13 October 2020
{{ship	French frigate	Latouche-Tréville	2}}	D 646	15 February 1984	19 March 1988	16 July 1990	1 July 2022

References

Bibliography

References

Ireland, Bernard. (1984). "Navies of the West". Ian Allan.
(24 March 2014). "Retrait définitif du service pour la frégate Georges Leygues". ActuNautique.com.
(1986). "Modern Naval Combat". Salamandar Books.
Groizeleau, Vincent. (2017-07-07). "La frégate Montcalm a tiré sa révérence". Mer et Marine.
(15 October 2020). "La Motte-Picquet : dernière cérémonie des couleurs à Brest". Mer et Marine.
Groizeleau, Vincent. (5 July 2022). "Fin du Latouche-Tréville : la Marine nationale tourne la page des frégates du type F70". Mer et Marine.

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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