Fórum Defesa Brasil

Mas pelo menos temos MAIS UM submarino , o "NRP Luís Amado", que até consegue afundar Fragatas atracadas na América, e isto tudo a partir de Lisboa!

Rui Elias Maltez escreveu:O que fodeu isto tudo foram os submarinos.

Eu sempre dise que a compra dos submarinos iria comprometer e hiptecar a possibilidade de termos marinha oceânica de superfície.

Ou se compravam 3 ou nenhum.

2 submarinos servem apenas para se gastar 700 milhões que não servirão para mais que dizer que temos o melhor, mas que realmente servem para muito pouco.

Rui Elias escreveu: momento, nem sequer a modernização das VdG está em cima da mesa, nem se fala para já na desejável (pela Marinha) compra do novo AOR.

Por isso, acho melhor ler com reservas essa notócia e esperar.

Em fragatas de 88 ou 89, pouco mais velhas que as VdG, acho que
valeria a pena o esforço.

O que pensas disso?

talharim escreveu:Eu acho que Portugal deveria desistir dessas OHP e adquirir algumas Type23 ou até mesmo Type 42 inglesas.

Se for para esperar até 2010...........até lá devem existir 1 ou 2 Type 42 disponíveis para venda.

Sea Dart
Type surface-to-air, surface-to-surface
Nationality UK
Era Cold War
Launch platform ship
Target aircraft or ship
History
Builder British Aerospace
Date of design
Production period
Service duration 1973
Operators UK (Royal Navy), Argentina
Variants ?
Number built ?
Specifications
Type
Diameter 0.42 m
Wing span 0.9 m
Length 4.36 m
Weight 550 kg
Propulsion Chow solid fuel booster motor
Bristol Siddeley Odin ramjet cruise motor
Steering control surfaces
Guidance semi-active radar illuminated by radar Type 909
Speed Mach 2.0+
Range 2 - 30 nm+
Ceiling ?
Payload
Warhead classified
Trigger proximity and contact

Withdrawal
The Sea Dart equipped Type 42s are reaching the end of their service lives, with some vessels already retired. Construction has begun on the Type 45 class which, with the much more capable PAAMS missile system, will replace the Type 42 from 2009.

HMS Norfolk (F230) was the first of the class to enter service, commissioned into the Fleet on June 1, 1990 at a cost of £135.449 million. Later vessels cost £60-96 million. The annual costs of running a Type 23 is around £16 million.

Weapons:
2 x quad Harpoon missile launchers
VLS GWS 26 Mod 1 Sea Wolf SAM system
1-4.5in (114mm) Vickers Mk 8 gun (all ships being upgraded with the Mod 1)
2 x Oerlikon 30 mm guns. Being upgraded to remote control with electro-optic director
4 Cray Marine 324mm (2 Twin) TT. Marconi Stingray.
NATO Seagnat, Type 182 and DLF3 decoy launchers

Sea Wolf
Type surface-to-air
Nationality UK
Era Cold War
Launch platform ship
Target missile, aircraft
History
Builder BAe, MDBA
Date of design
Production period
Service duration 1979 -
Operators UK, Brazil and Chile
Variants Electronics;
GWS-25, GWS-26, GWS-27
Vertical Launch
Number built
Specifications
Type
Diameter 0.18 m
Wing span 0.7 m
Length 2.0 m
Weight 80 kg
Propulsion Blackcap solid fuel sustainer
Steering control surfaces
Guidance automatic command line of site
Speed Mach 2
Range 300 m - 10 km
Ceiling 3000 m
Payload
Warhead 14 kg blast
Trigger proximity or contact

Characteristics

Sea Wolf is powered by the Blackcap solid-fuel rocket to a maximum velocity of Mach 2 and can intercept targets in the range of 300 to 6500m and 10 to 3000m in altitude. The 14 kg warhead is a proximity fuzed HE-fragmenting type. In the manually loaded form, the missiles are stored onboard in individual maintenance-free canisters, sealed until use and handled like a round of ammunition.

The system is fully automated and uses a combination of visual (CCTV) and radar tracking. Originally the Type 910 was used, but this suffered from poor performance engaging low-altitude targets in the Falklands War and was subsequently replaced by Type 911 from the 7th Type 22 Frigate onwards. The Sea Wolf fire control system is passed targets from higher systems (such as surveillance radar, fleet AEW cover or ship-borne passive ESM systems) which it then locks using its own radar. The ship-board system issues guidance commands to the missile through an Automatic Command to Line of Sight (ACLOS) device controlling the rear fins of the missile

[edit]
Combat performance
During the Falklands War, Sea Wolf was present on board HMS Brilliant and HMS Broadsword. As the Royal Navy's only modern point-defence weapon at the time, the two Type 22 frigates so equipped were assigned "goalkeeper" duties; close anti-aircraft defence of the carrier task force. Unlike the long-range Sea Dart, Sea Wolf lived up to expectations and performed well in combat. On May 22nd 1982, Brilliant was attacked by and drove off a flight of four Argentine A-4 Skyhawk aircraft; destroying 2 and causing a third to crash trying to avoid the missile. Sea Wolf accounted for five successful 'kills' from only eight launches.

In an attempt to overcome the fleet's evident air defence deficiency, a new tactic was devised. A Type 22 frigate and a Type 42 destroyer (a 22/42 combo) were deployed together some distance from the main fleet, covering likely attack routes, in an attempt to draw attacking aircraft into a 'missile trap'. It is indicative of the compromised Type 42's shortcomings that the Navy's newest air-defence destroyer required an anti-submarine frigate to act as close air-defence. Broadsword however was unable to successfully defend HMS Coventry when the pair were attacked on May 25th. The latter, moving evasively, crossed in front of Broadsword and broke the Sea Wolf's lock on the attacking aircraft. Sea Wolf also suffered from problems with hardware failure causing launches to fail, and broken lock resulting from the extreme sea conditions and the Argentine's low altitude hit-and-run tactics, and multiple targets and crossing targets - neither of which it was designed to intercept.

As of 1991 Sea Wolf/LWTis said to have a 70% hit chance and VL Sea Wolf is said to have 80% kill rate.

[edit]
Variants
[edit]
Vertical Launch
Instead of an aimed launcher, the Sea Wolf VL missile is a vertical launch system. The missiles are packed into tubes forming a "silo" on the deck. Missiles are launched vertically by a booster motor and rapidly flipped onto their flight path by thrust vectoring. The boost and vectoring stages then separate. Vertical launch Sea Wolf went into service as GWS-26.

Block 2 Seawolf is a replenishment upgrade to the existing stocks of Seawolf missiles. Block 2 missiles will replace all Seawolf missiles, both on Type 22s and Type 23s, as part of the normal ammunition replenshiment. In a parallel programme, the associated Type 911 tracker is being upgraded by the addition of an infra-red camera, enhanced tracking software and new operator's consoles.

Block 2 Seawolf is not a "Fire and Forget" missile; it still relies on target data from the parent ship all the way to intercept. A variant with a fire-and-forget capability, GWS-27, was cancelled in 1987.

[edit]
Lightweight Sea Wolf
This variant was to use a four-missile launcher, similar in form to that of the obsolete Sea Cat system. It was to equip the Royal Navy's Invincible class carriers and Type 42 destroyers to supplement the medium range Sea Dart system, which could not intercept sea-skimming anti-ship missiles such as Exocet. However, it was cancelled before it entered service.

£16mil= 23,368,453 EUR

De qq modo, se por esperar mais uns anos tivessemos 2 navios mais recentes seria uma boa jogada!!!

Não estou a ver o governo a ser assim tão "inteligente"...mas pode ser que...