dilluns, 13 d’agost de 2012

Charles De Gaulle Nuclear-Powered Aircraft Carrier*

The 38,000t, nuclear-powered aircraft carrier Charles De Gaulle was constructed at the DCN Brest naval shipyard in Brittany. The ship was launched in May 1994 and commissioned in September 2000, following sea trials which began in January 1999. As a result of trials the landing deck has been lengthened by 4.4m to enable the E-2C to land and clear the deck quickly.
The carrier was due to enter service in December 2000, but, following the breakage of a propeller blade during long-distance trials, this was delayed to April 2001. In June 2001, the carrier took part in exercises in the Mediterranean and in December 2001 left to take part in Operation Enduring Freedom where it was stationed in the Arabian Gulf. It returned to its home port of Toulon in July 2002. Super Etendard and Hawkeye E-2C aircraft carried out a number of sorties but the ship's F1 standard Rafale M fighters did not take part in operations, although they were included in exercises with the US Navy.
In April 2007, DCN became DCNS. This followed an agreement in which Thales became a 25% shareholder in the new company and DCN acquired the naval business of Thales France (excluding naval equipment).

The combat system has also been adapted for operations with the Rafale F3 equipped with AASM, ASMPA and Scalp-EG missiles The refit was completed and the carrier returned to the French Navy in December 2008. The vessel is scheduled to undergo a major maintenance overhaul in 2015.In September 2007, Charles de Gaulle began a refit which included overhaul and refuelling of the nuclear propulsion system and installing a new SYTEX command and control system with Syracuse III satellite communications system.

French Navy CVF aircraft carrier

The French Navy's plans of a second carrier have been put on hold. The new carrier would not be the same class as the Charles de Gaulle, but would be a conventionally powered carrier. It would be built by DCNS.
The design phase for the carrier programme (PA2) was launched in January 2005. In December 2005, following discussions between the French and UK governments on the possibility of a joint development with the UK'sCVF carrier project which Thales UK is designing, it was agreed that France would pay one-third of the costs of the demonstration phase of the baseline CVF design.

Charles De Gaulle aircraft

The ship can operate a fleet of up to 40 aircraft: Rafale M (range 3,340km), Super Etendard (range 1,682km) and three E-2C Hawkeye airborne early warning aircraft. The ship will also support the AS 565 Panther or NH 90 helicopter.
The main deck consists of a main runway angled at 8.5° to the ship's axis and an aircraft launch area forward of the island. These are each equipped with a USN Type C13 catapult, capable of launching one aircraft a minute. The runway is 195m long and the whole deck measures 260m x 64m. The carrier is fitted with the Sagem Defense Sécurité (formerly EADS Defence & Electronics) DALAS laser landing aid.

SATRAP computerised stabilisation system

The carrier is fitted with the SATRAP computerised, integrated stabilisation system designed to maintain stabilisation to within 0.5° of horizontal, allowing aircraft to be operated up to sea state 5/6.

These tracks run transversely below the flight deck. This system is designed to compensate for wind and heel and control roll, yaw and surge.As well as the carrier's two pairs of active stabilising fins and twin rudders, the system has two computer-controlled compensation units which consist of two rail tracks for trains carrying 22t of deadweight.

Combat management systems

The ship's weapons are managed by a Senit combat management system, which has the capacity to track up to 2,000 targets. The weapon control system consists of two Vigy 105 optronic directors supplied by Sagem. The ship also has two Sagem Vampir search and track systems.
In February 2004, Thales was awarded a contract for a new command and control system for the French Navy. The new system, called SYTEX, is being fitted on the Charles de Gaulle as well as other vessels and shore locations and will allow the vessel to access national or coalition command networks.

Surface-to-air missiles

The SAAM (surface anti-air missile) system, developed by Eurosam (set up by MBDA and Thales), provides defence against hostile aircraft and anti-ship missiles. The system uses the Aster 15 surface-to-air missile and entered operational service in November 2002, with the first firing of the missile from the Charles de Gaulle.
The Aster missile has a 13kg warhead and a range of 30km. The missile's guidance is inertial with data uplink and active radar terminal homing. For increased manoeuvrability in the terminal phase, the missile uses a 'PIF-PAF' direct thrust control system with gas jets. Two eight-cell Sylver vertical launch systems are installed on the starboard side forward of the bridge and two on the port side aft of the bridge.
The system uses the Thales (formerlyThomson-CSF) Arabel radar, which is a multi-function three-dimensional radar with a range of 70km for a target area of 2m².
The ship has two six-cell Sadral launching systems for the MBDA (formerly Matra BAe Dynamics) Mistral anti-aircraft and anti-missile missile. Mistral has an infra-red seeker and a range of 4km.

20F2 20mm guns

The ship is equipped with eight Nexter (formerly Giat) 20F2 20mm guns, which fire 0.25kg shells at 720 rounds/min to a range of up to 8km.

Four Sagem Defense Securite (formerly EADS Defence & Electronics) Sagaie 10-barrel trainable decoy launchers are installed. The system fires chaff to 8km and infra-red flares to a range of 3km. Two Thales ARBB 33 jammers, mature versions of the Salamandre, are installed to jam I-, H- and J- band radar signals.


Electronic support measures include the Thales ARBR 21 radar warner. The aircraft carrier will also be fitted with a SLAT anti-torpedo system being developed by Euroslat, a consortium consisting of WASS (Whitehead Alenia Sistemi Subacquei), DCNS and Thales Underwater Systems (formerly Thomson Marconi Sonar).

Radar sensor suite

The suite of radar sensors installed on the carrier are: Thales DRBJ 11B three dimensional long range air search radar operating in the E- to F- bands; Thales DRBV 26D Jupiter medium / long-range air search radar operating at D-band; Thales DRBV 15C Sea Tiger mk2 air and surface search radar operating at E and F bands; two Thales (formerly Racal) Model 1229 navigation radars operating at I band; and the Thales Arabel fire control radar operating at I to J band.

Propulsion and power plant

The Charles De Gaulle is equipped with two nuclear pressure water reactors, PWR Type K15, which provide a speed of 27kt. The 61MW turbines are from Alsthom. The propulsion system has the capacity to provide five years continuous operation at 25kt before refuelling.

* Article publicat a Naval Technology. El Charles de Gaulle, peça central de la Marine National, és una nau poc coneguda en relació a les seves potencialitats. Compartim amb els lectors aquest article per posar-hi esmena.

3 comentaris:

  1. Llàstima que els gabatxos no tinguin prous calers per posar en línea un segon PA.
    El seu programa, ni que fos aprofitant el disseny de la classe britànica "Queen Elizabeth" i renunciant a la propulsió nuclear, ha estat ajornat "sine die".
    I no sembla que el Hollande tingui més interés en els portaavions que en subvencionar les mares solteres; questió de ideología esquerranosa.

  2. Els recursos són limitats a tot arreu, però òbviament, no tothom té les mateixes prioritats... Segurament abandonar el projecte conjunt va ser un error. Igual que el PM Cameron l'erra en no equipar el QE amb configuració CATOBAR.