Monday, October 31, 2011

Deadly The Queen Elizabeth class aircraft carriers

Army and Weapons | Deadly The Queen Elizabeth class aircraft carriers | The Queen Elizabeth class aircraft carriers (formerly CVF Future of the CV project) a two-ship class aircraft carrier built for the Royal Navy. HMS Queen Elizabeth is expected to enter service in 2020 and HMS Prince of Wales is expected to initially be held in a state of "extended readiness" after completion. HMS Queen Elizabeth will be built on a CATOBAR configuration. The construction of HMS Prince of Wales was assured by the 2010 Strategic Defence and Security Review, although its role in the immediate aftermath of the Commission is still uncertain. The vessels will displace approximately 65,600 tons, is 284 meters (932 feet) long and have a tailored air group of up to 40 aircraft. They are so far the largest warships ever built for the Royal Navy.

The contract for the ships was announced on July 25, 2007 by then-Defense Secretary Des Browne, ending several years of delay costs and British naval shipbuilding restructuring problems.  The cost was initially estimated at £ 3.9 billion. The contracts were officially signed one year later, on July 3, 2008 after the formation of BVT Surface Fleet from the merger of BAE Systems Surface Fleet Solutions and VT Shipbuilding VT Group, which was a requirement of the British government.
The 22,000-ton Invincible-class aircraft carriers were designed for Cold War anti-submarine warfare in the North Atlantic Ocean as part of a combined NATO fleet, they have limited space for STOVL fixed-wing aircraft. The 1982 Falklands War demonstrated the need for carriers to keep the foreign policy of the United Kingdom to support.

Since the end of the Cold War, the Invincible-class ships have used a more conventional aircraft carrier mission: that of power projection. As a result, the Harrier GR7 aircraft mainly operated by the Royal Navy, is routinely used on the carriers, which have been adapted to more aircraft and ammunition (particularly with the removal of the Sea Dart defensive weapon system). Despite the shortcomings of the Invincible-class in this role, the formal studies until 1994 on the replacement of vessels.
The Ministry of Defence has decided not to use nuclear power because of high costs. The carrier drive system will be fully integrated electric drive (IFEP). Electrical power is generated at 11,000 volts by two Rolls-Royce Marine Trent MT30 36 MW (48,000 hp) gas turbine generator units and four Wärtsilä Diesel Generator sets (September 2 MW (12,000 hp) and two 11 MW (15,000 hp) sets). This power is used for both electric propulsion and ship domestic system. The electrical energy is used for four, Converteam, Advanced Induction Motors, two drive axle and located in three separate compartments to improve survivability in the event of action damage or flooding. Each 20 MW (27,000 hp) engine is driven by a pulse width modulated Converteam VDM 25000 variable frequency converter output so that the shaft speed is controlled over the full operating range produce. The propulsion power management system is fully integrated with the platform of the ship management system provided by L-3 Communications. This unique drive system eliminates the need for large gearboxes, compact and by minimizing the number of current generators for a given speed is very economical.
Specification : 
Displacement: 65,000 tons
Length: 284m 
Width: 70m (cockpit)
Height: 56m (keel to mast top) 
Design: 11m 
Decks: 9 (+ Flight Deck and superstructure)
Complement: 600 (up to 1000 + air wing) 
Aircraft Carried: 40 to F-35B, helicopters and drones 
Fuel Storage: 8600 tons 
Flight Deck Area: 13 000m ²Hanger Space: 29 000m ³
Maximum speed: 25 + kts 

Unrefuelled range: 000nm 10
Expected availability: 584 days / year (2 ships)
Interval between the berths: 6 years 
Propulsion: 2 x 36MW Rolls Royce MT30 marine gas turbine alternators, 4x 10 MW Diesel Engine
The design puts a gas turbine-generator unit in each island in the starboard sponson. This relatively high position, the need for air takes down / deep hole in the ship. Conversely, the diesel generator sets mounted low in the boat, the weight of these units to contribute to the stability of the ship. Unrefuelled the range of the carrier will be 10,000 NMI (19,000 km).

The power and propulsion system is designed and built in a Sub Alliance scheme which brings together leading companies in their specific areas to identify the most cost-effective mechanism for delivery of the integrated system for QEC program. This innovative scheme is led by Thales UK as members of the Aircraft Carrier Alliance and supported by Converteam UK, Rolls-Royce and L-3 Communications.

Many of the systems are not specified, but most of the designs that have been released so far show a BAE Systems Insyte / Thales S1850M long range radar on the island to the front structure. However, it was announced on August 4, 2008 that they would be equipped with BAE Systems Insyte Artisan 3D radar as a medium range radar mounted on the stern island.Aster missiles could be installed for self-defense, but this was never officially declared.