F/A-22 em risco?

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TOMKAT

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« Responder #45 em: Maio 06, 2006, 05:34:59 pm »
Por vezes até o mais sofisticado dos sistemas falha onde menos se espera.

Uma falha no sistema hidráulico de abertura da carlinga de um F22 deu nisto....

E o piloto a secar....    :)








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Azraael

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« Responder #46 em: Maio 06, 2006, 06:14:45 pm »
Citação de: "TOMKAT"
Por vezes até o mais sofisticado dos sistemas falha onde menos se espera.

Uma falha no sistema hidrálico de abertura da carlinga de um F22 deu nisto....

E o piloto a secar....    :)

n teria sido  mais simples utilizar o sistema de emergencia que abre a carlinga no caso de uma ejeccao do piloto (sem a ejeccao do assento, obviamente)? Ou isso causaria ainda mais danos ao aparelho?
 

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SSK

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« Responder #47 em: Agosto 02, 2007, 09:17:32 pm »
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6.3 billions in Multiyear Awards Complete Funding for 183 Raptors

The US Air Force awarded Lockheed Martin (NYSE:LMT) an additional $5 billion from the U.S. Air Force for the production of three lots of
F-22 Raptor air dominance fighters from the year 2008 through 2011. The current award brings the total multi-year F-22 contract value to $7.3 billion and extends the production of the aircraft through the year 2011.

The U.S. government previously awarded $2.3 billion of the contract to buy long lead- time parts and maintain continuous manufacturing flow. The air force also awarded a $1.3 billion multiyear contract to Pratt & Whitney to produce the Raptor's F119 engines. Two F119 engines enable the F-22 to supercruise or achieve supersonic speeds without the use of the afterburner.

"The multi-year contract allows us to generate savings for the taxpayer and continue to deliver the most capable aircraft in the world to the men and women defending our nation," said Larry Lawson, Lockheed Martin Aeronautics executive vice president and F-22 program general manager. A recent RAND Corporation study, the multi-year contract is estimated to save approximately $400 million over Lots 7, 8 and 9 (60 aircraft), compared to a corresponding annual procurement program. This equates to a savings of $6.85 million per aircraft.

The F-22 is produced in partnership with Boeing and Pratt & Whitney with parts and subsystems provided by nearly 1,000 suppliers in 44 U.S. states. F-22 production takes place at Lockheed Martin Aeronautics facilities in Marietta, Ga.; Fort Worth, Tex.; Palmdale, Calif.; and Meridian, Miss., as well as at Boeing's plant in Seattle, Wash. Final assembly and initial flight testing of the Raptor occur in Marietta. Currently, Raptors are being built at a rate of approximately two per month. The multiyear procurement will sustain a production rate of 20 per year, with deliveries starting in late 2008. That plan will bring the total F-22 buy to 183 aircraft, the most allowed under the 2006 Quadrennial Defense Review findings. To date, 105 Raptors have completed final assembly at the Lockheed Martin facility in Marietta, Ga. So far, 99 Raptors have been delivered to the Air Force.

:arrow: http://www.defense-update.com/products/f/F-22.htm
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BC304

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« Responder #48 em: Abril 06, 2009, 10:15:06 pm »
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Defense Secretary Robert Gates on Monday recommended halting production of the F-22 fighter jet and scrapping a new helicopter for the president as he outlined deep cuts to many of the military's biggest weapons programs.

The department must ensure it has the right programs and money to "fight the wars we are in today and the scenarios we are most likely to face in the years to come, while at the same time providing a hedge against other risks," Gates said as he revealed details of his budget for the next fiscal year.

The promised emphasis on budget paring is a reversal from the Bush years, which included a doubling of the Pentagon's spending since 2001. Spending on tanks, fighter planes, ships, missiles and other weapons accounted for about a third of all defense spending last year. But Gates noted more money will be needed in areas such as personnel as the Army and Marines expand the size of their forces. [...]

Production of the F-22 fighter jet, which cost $140 million apiece, would be halted at 187. Plans to build a new helicopter for the president and a helicopter to rescue downed pilots would be canceled. A new communications satellite would be scrapped and the program for a new Air Force transport plane would be ended.

Some of the Pentagon's most expensive programs would also be scaled back. The Army's $160 billion Future Combat Systems modernization program would lose its armored vehicles. Plans to build a shield to defend against missile attacks by rogue states would also be scaled back.

Yet some programs would grow. Gates proposed speeding up production of the F-35 fighter jet, which could end up costing $1 trillion to manufacture and maintain 2,443 planes. The military would buy more speedy ships that can operate close in to land. And more money would be spent outfitting special forces troops that can hunt down insurgents. [...]

The Government Accountability Office reported last week that 96 of the Pentagon's biggest weapons contracts were over budget by a "staggering" figure of $296 billion.

A bill in Congress would require the Pentagon to do a better job of making sure proposed weapons are affordable and perform the way they should before the military spends big sums on them. The Defense Department has already adjusted its acquisitions policy to achieve some of those goals.
 

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JMM

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« Responder #49 em: Abril 07, 2009, 10:39:57 am »
Atenção que estas são só as recomedações do Secretário da Defesa... nos Estados Unidos, o Congresso é que tem a última palavra e o F-22 tem muitos defensores poderosos, pelo que ainda não é nada líquido que não se produza mais nenhum.

Neste momento a USAF já percebeu que não vai ter os 381 que queria inicialmente e está a fazer lobbying para construir mais 40 a 60, porque (surpresa, surpresa.... até parece que o mesmo não acontece com os B-2) a taxa de disponibilidade ods F-22 é só de cerca de 60% por causa da manutenção dos painéis e revestimentos stealth!

Operacionalmente parece-me de incríveis vistas curtas cortar a produção do F-22 quando se sabe que a China, a Rússia e a Índia estão a desenvolver caças de 5ª geração e que os próximos F-22 são muito mais baratos (embora ainda estupidamente caros...) visto que os custos de R&D já estão amortizados... além disso podiam ainda ficar mais baratos se os americanos os vendessem a Israel, Australia e Japão, coisa que estão impedidos de fazer por lei...

É mais um caso típico de preparação para combater a última guerra em vez da próxima, mas quando não há dinheiro alguma coisa tem que ceder...
 

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nelson38899

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« Responder #50 em: Abril 25, 2009, 01:05:23 pm »
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F-22 shootdown by T-38

The successful T-38 kill occurred within the last three months at Holloman AFB, NM, says Lt Col Lloyd Addison, chief of the USAF's T-38 sustainment office.

That means the aircraft is from the same black-painted T-38 unit that escorted F-117s before they were retired. Now, the Holloman T-38's provide proficiency training for F-22 pilots, among other tasks. It seems likely that an experienced F-22 pilot was in the cockpit of the T-38.]

The facts are a bit sketchy here. This clip was posted to YouTube on 18 April by an anonymous user named "d43e49". The video identifies the attacking aircraft as a T-38, but it's not confirmed by anything shown within the clip. At the 35-sec mark, the F-22's shape is clearly visible as it emerges above the target sight after the kill.

As far as I know, this is the first video clip of a simulated F-22 shootdown to reach the public domain. That is newsworthy by itself. Let's also be very clear: a single simulated kill without context says nothing meaningful about the F-22's dogfighting or aerial prowess. Even an EA-18G can apparently get lucky once.

If a T-38 was really involved, then congratulations to the pilot. Your are either absurdly lucky or insanely skilled.

http://www.youtube.com/watch?v=UXmDj3mFrXQ
http://www.flightglobal.com/blogs/the-d ... l#comments
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Smoke Trails

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Re: F/A-22 em risco?
« Responder #51 em: Outubro 01, 2009, 06:56:41 pm »
Boa Tarde

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F-22A Raptor

Claim to Fame
The F-22A is less an aircraft than a phenomenon. As an air-to-air fighter it may be the best in the world, especially at close quarters, but for multi-role combat duties the F-22A is hindered by its stealth features that require all ordinance and extra fuel to be carried internally. It may be a ‘fifth generation’ fighter (along with the F-35), but the F-22A is also the warplane that was supposed to cost $90 million apiece and ended up with a sticker price of about $310 million when development costs were included. Now that the Obama Administration is seeking to cap production at 187 airframes, far short of was estimated for overseas sales, with the last to be delivered in 2011, the F-22A will serve in the smallest numbers of any fighter in living memory.

Why?
The F-22A was developed under the Advanced Tactical Fighter programme to ensure air superiority in an atomic war with the Soviet Union. Today, a sufficient number of F-22As would be able to clear the skies of opposing fighters from the most potential US adversaries, ensuring that US ground troops would never com under ground attack from enemy aircraft. With stealth and super-cruise, creating the ability to fly towards its target faster than sound, the F-22A should be able to arrive over the battle-space undetected, shoot down enemy fighters before ever being seen, and kill any survivors in close-quarters dogfights. Low observable features, a speed well beyond Mach 2.0, and the power of two 35,000lb (15,875kg) thrust Pratt & Whitney F119-PW-100 turbofan engines, with afterburners, make the single-seat, twin-engine, twin-tail F-22 a formidable adversary. The ‘why’ of the F-22A remains elusive nonetheless. One recent F-22A squadron commander wonders why the US Air Force did not sink its resources into a less capable but far less costly advanced version of the F-15 Eagle instead.

Conflicts
None yet.

Weaknesses
The USAF fielded its first 134 F-22A (of the 187 planned, included two that have crashed) without having developed a datalink system for the aircraft. This means the F-22A excels in simulated dogfights, but it is nearly useless in ‘net-centric’ conflict – its pilots able to reach the outside world only via voice radio. The F-22A lacks a helmet-mounted cueing sight and there are no plans to integrate one. An Air Combat Command spokesman said: “This is not a concern.” The F-22A is currently unable to employ the AIM-9X advanced Sidewinder heat-seeking missile but plans exist to add the capability by 2016. The F-22A’s M61A1 canon is equipped with just 480 rounds, compared to 940 rounds on the F-15C Eagle.



“We’re cleared for routine flights up to 50,000ft (15,120m) and to Mach 2.0. I spent eight years in the F-15C Eagle and never did anything like that routinely or at standard military power. At that height, and I’m not saying the Raptor can’t go higher, you have a tremendous advantage with your AIM-120 AMRAAM. If I am at 50,000ft (15,120m) and going Mach 2.0, the AIM-120 loves that. Launch the missile and it will go forever and have enormous energy on impact."

An F-22 pilot, 1st Fighter Wing, Langley Air Force Base, Virginia.



“The Raptor’s super-cruise range is not only good but it also sets it apart from previous fighters. The large internal fuel fraction (fuel weight divided by empty weight) allows the aircraft to sustain these high speeds for extended periods. The ingenuity and craftiness of future generations of fighter pilots will determine exactly how this capability will be used. But I can say that this airplane will perform outside the realm of current and projected fighters."

Paul Metz, test pilot, quoted in Lockheed Martin’s ‘Code One’ magazine.



“Six of the Best American Fighters”, by Robert F Dorr, AirForces Monthly October 2009, pages 50-63

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FoxTroop

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Re: F/A-22 em risco?
« Responder #52 em: Novembro 17, 2010, 08:32:31 pm »
 

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Edu

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Re: F/A-22 em risco?
« Responder #53 em: Novembro 17, 2010, 10:48:22 pm »
Até aparecerem os destroços não se sabe se caiu. No Alasca talvez tenha sido uma deserção para a Russia... :N-icon-Axe:
 

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Cabeça de Martelo

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Re: F/A-22 em risco?
« Responder #54 em: Novembro 18, 2010, 12:54:03 pm »
7. Todos os animais são iguais mas alguns são mais iguais que os outros.

 

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dc

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Re: F/A-22 em risco?
« Responder #55 em: Setembro 24, 2011, 11:28:55 am »
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Quanto custa operar um F-22?


Winslow Wheeler, diretor do “Centre for Defense Information”, obteve os mesmos dados que  Stephen Trimble (do blog The DEW Line) sobre os custos de operação e manutenção das aeronaves da USAF. Trimble tabelou os dados e publicou os mesmos em seu blog. O Poder Aéreo reproduziu as tabelas recentemente, mas naquele estudo não haviam informações sobre o F-22.
 
Wheeler criticou os relatórios enviados, dizendo que os mesmos estavam incompletos e eram inconsistentes. Mas dentro das limitações dos relatórios enviados, foi possível extrair os dados referentes à operação do F-22 Lightning II, o caça furtivo mais avançado do mundo em operação. Leia abaixo os principais pontos levantados por  Wheeler sobre a operação do F-22.
 
O Custo Extraordinário de Apoio a Aeronaves Furtivas
 
Desde que foi inicialmente introduzido no final de 2005 até 2008, o custo da hora de voo do F-22, conforme relatado, tende a cair. Enquanto isso, os custos dos velhos F-15C subiram. Ambos são as tendências esperadas para uma aeronave nova e outra velha, mas mesmo assim o F-22 é quase US $ 10 mil mais caro por hora.
 
Para 2009 – 2010, a média do custo por hora de voo do F-22 é de mais de 54.000 dólares e do F-15C tem uma média de quase US $ 35.000, uma diferença de US $ 19.000, e que certamente irá aumentar.
 
O F-22 não está se mostrando 35% mais barato de operar do que o F-15C, conforme prometido, mas 56% mais caro.
 
Comparado com a versão mais complexa e mais nova do F-15, o F-15E Strike Eagle, o F-22 é 93% mais caro para operar. O F-22 é de longe o caça mais caro de se operar no inventário da USAF.
http://www.aereo.jor.br/2011/09/21/quan ... r-um-f-22/

F-22 Lightning II  :lol:
 

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chaimites

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Re: F/A-22 em risco?
« Responder #56 em: Setembro 29, 2011, 05:04:31 am »
:shock:  :shock:  :D

podiam ser verdes! :P
« Última modificação: Outubro 01, 2011, 03:56:32 am por chaimites »
 

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chaimites

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« Responder #57 em: Outubro 01, 2011, 03:38:43 am »
Citação de: "nelson38899"
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F-22 shootdown by T-38

The successful T-38 kill occurred within the last three months at Holloman AFB, NM, says Lt Col Lloyd Addison, chief of the USAF's T-38 sustainment office.

That means the aircraft is from the same black-painted T-38 unit that escorted F-117s before they were retired. Now, the Holloman T-38's provide proficiency training for F-22 pilots, among other tasks. It seems likely that an experienced F-22 pilot was in the cockpit of the T-38.]

The facts are a bit sketchy here. This clip was posted to YouTube on 18 April by an anonymous user named "d43e49". The video identifies the attacking aircraft as a T-38, but it's not confirmed by anything shown within the clip. At the 35-sec mark, the F-22's shape is clearly visible as it emerges above the target sight after the kill.

As far as I know, this is the first video clip of a simulated F-22 shootdown to reach the public domain. That is newsworthy by itself. Let's also be very clear: a single simulated kill without context says nothing meaningful about the F-22's dogfighting or aerial prowess. Even an EA-18G can apparently get lucky once.

If a T-38 was really involved, then congratulations to the pilot. Your are either absurdly lucky or insanely skilled.

http://www.youtube.com/watch?v=UXmDj3mFrXQ
http://www.flightglobal.com/blogs/the-d ... l#comments


 A vantagem do F22 esta na capacidade de combate fora do alcance visual.  num dog figthing é  um avião  que pode ser abatido como os outros
 

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cmc

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Re: F/A-22 em risco?
« Responder #58 em: Outubro 20, 2011, 07:53:45 pm »
De saltos altos no campo de batalha:

 

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Smoke Trails

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Re: F/A-22 em risco?
« Responder #59 em: Outubro 21, 2011, 07:06:11 pm »
Boa noite,

Citação de: "TOMKAT"
Por vezes até o mais sofisticado dos sistemas falha onde menos se espera.

Uma falha no sistema hidráulico de abertura da carlinga de um F22 deu nisto....

E o piloto a secar....    :)
Desde as 08:30 até quase ás 13:00!!!

Citação de: "Azraael"
n teria sido  mais simples utilizar o sistema de emergencia que abre a carlinga no caso de uma ejeccao do piloto (sem a ejeccao do assento, obviamente)? Ou isso causaria ainda mais danos ao aparelho?
Esse sistema também não funcionou!

Citação de: "FoxTroop"
Desapareceu (caiu) um Raptor.
Relativamente á queda do F-22 no Alasca, concluiu-se que foi devido á contaminação do oxigénio. Quando ainda estava no interior do hangar, e devido ás condições atmosféricas, o sistema interno gerador de oxigénio terá aspirado gases de exaustão dos motores, o que levou á recomendação de que o sistema só deve ser accionado quando o avião estiver fora do hangar.

Citação de: "chaimites"
A vantagem do F22 esta na capacidade de combate fora do alcance visual.  num dog figthing é  um avião  que pode ser abatido como os outros
Porque a furtividade não é compatível com a manobrabilidade.

Citação de: "cmc"
De saltos altos no campo de batalha:
Quando molhada, a pintura stealth perde parte das suas capacidades; isso já tinha sido constatado no B-2.

O piloto do F-22 apenas não pode comunicar com outros sistemas num ambiente net-centrico.

Diferentes partes do Typhoon são produzidas em vários países, no entanto no final, todas “encaixam” sem nenhum problema.

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