Fórum Defesa Brasil

mmatuso escreveu:Dependendo de quando a gente recebesse os F-35 seria um grande negócio porque o Gripen NG ainda vai levar uns anos.

Apenas o SH e o Rafale teria vantagem por serem projetos prontos e já terem aviões disponíveis.

Lógico que o F35 é uma plataforma tecnológica mais avançada, o comentário é mais sobre a disponibilidade de entrega.

Penguin escreveu:

mmatuso escreveu:Dependendo de quando a gente recebesse os F-35 seria um grande negócio porque o Gripen NG ainda vai levar uns anos.

Apenas o SH e o Rafale teria vantagem por serem projetos prontos e já terem aviões disponíveis.

Lógico que o F35 é uma plataforma tecnológica mais avançada, o comentário é mais sobre a disponibilidade de entrega.

Mas com as modificações exigidas pela FAB, nenhum deles seria entregue com menos de 3 anos.

mmatuso escreveu:

Penguin escreveu: Mas com as modificações exigidas pela FAB, nenhum deles seria entregue com menos de 3 anos.

Mas entre um caça que nunca voou ou foi testado com modificações, 2 que já voam e pode começar a ser implementados a mudança e um terceiro que pode demorar um pouco mais, mas é uma plataforma mais avançada eu iria fácil em um 5g.

Chuto que se a entrega demorasse 2 anos a mais ainda que os outros valeria pena esperar um 5g.

Fora que é uma plataforma em começo de vida e com tempo para evoluir maior.

Mas nunca esperaria a FAB ser tão da vanguarda, infelizmente.

2nd F-35 Squadron to Be Established

(Source: Israel Air Force; issued Dec 02, 2014)

The establishment of a second F-35 stealth fighters squadron was approved by the Israeli government earlier this week, after a two-year long process.

In addition, the government approved the acquisition of precision-guided munitions.

The first of the 14 stealth fighters of the second squadron are scheduled to land in Israel in 2019 and will join the 19 JSFs of the first squadron which will be operational by then. In 2017, the purchase of 17 additional jets will also be considered.

The approval is the result of a long process managed by the IAF Headquarters, Materiel Division and the Planning Directorate and reflects the government's will to strengthen the IAF and ensure state security for decades ahead. The transaction also includes the development of Israel-specific configuration for 31 JSFs, including spare parts and infrastructure.

The F-35 is a stealth multi role fighter designed by the American Lockheed Martin and considered the most advanced of its kind. This is the first fifth generation aircraft to be integrated in the IAF.

The first acquisition, which included 20 JSFs, was approved in September 2010 and thereupon the IAF began preparing and building the infrastructure for the long-awaited delivery. In April 2013 the F-35 got its Hebrew name - "Adir" (Hebrew for Mighty).

Joint Strike Fighter

The JSF project began with an agreement signed between the U.S and Britain in January of 1986. The goal of the project was to examine alternatives to a fighter jet with VTOL (Vertical Takeoff and Landing) capabilities. Later, the American Navy and Marine Corps, the main purchasers of the new fighter-jet, were required to define their common operational and technical needs for the jet.

A major turning point occurred in 1994, when the Pentagon decided to consolidate two fighter jet development projects and actually created the JSF (Joint Strike Fighter) Project. The goal of the project was to develop three models of the advanced fighter jet.

The first model, which was of the conventional configuration, was designed for the United States Air Force. The second model was designed for taking off from Navy aircraft carriers and the third model was a version that included vertical takeoff and landing for the United States Marine Corps and the British Royal Navy.

Stealth and Sophisticated

The F-35 is a multi-role fighter that boasts great versatility and should excel at attacking ground targets during the day, at night and under all weather conditions. Additionally, the F-35 should demonstrate quality of performance during air battles, both short range and at ranges beyond the line of sight.

How does the F-35, which is defined as "fifth generation" fighter, represent a quantum leap relative to the F-16 fighters, which are defined as the "fourth generation"? The biggest differences are in two main areas.

The first of which is the field of stealth technology: for the first time, a large part of the US Air Force will be based on aircraft with low RCS (radar cross section). Until today, this capability was restricted to very expensive planes such as the B-2 and the F-117, which were purchased in small numbers.

The F-35 is equipped with the most advanced stealth technology that does not require expensive maintenance like the stealth technology of previous generations.

A Leap forward in the field of Avionics

The next step for the F-35 is in the field of Avionics. The F-35 will be equipped with a wide sensors system that includes advanced radar, an infrared-detection system and active electronic warfare systems.

While the "fourth generation" fighter jets and some of the "fourth-and-a-half generation" fighter jets have removable systems, in the F-35 the systems are an integral part of the jet.

These advanced systems enable the pilot to integrate data that is received from them. The result is clear, precise picture of the battlefield in real time. The integration of data lightens the pilot's workload and provides him with better flight orientation.

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Fuel Temperature Can Shut Down F-35

(Source: Defense-Aerospace.com; published Dec 08, 2014)

PÄRIS --- Again, another truly remarkable facet of the F-35 program is discovered purely by chance, without ever having been mentioned in any of the innumerable studies and reports on the program that have been published over the past 12 years.

Thanks to a story on the curious subject of repainting fuel trucks posted over the week-end on the US Air Force website, and reproduced below, the world has discovered that “the F-35 has a fuel temperature threshold, and may not function properly if the fuel temperature is too high.”

And if that was not enough, the US Air Force feels this is a problem of sufficient concern to look for ways to “mitigate any possible aircraft shutdowns due to high fuel temperatures in the future.”

While this may not pose operational problems to Norway or possibly Canada, other future operators ranging from Turkey to Japan to Australia, and from Israel to Italy, may be surprised to find that the F-35s they plan to buy will not be able to fly when temperatures exceed values that are routine in the summer in their part of the world.

While the USAF story does not say what the “fuel temperature threshold” is, mentioning 110 degrees Fahrenheit (43°C) shows it is a very low one, especially as tarmac or concrete used on airfield aprons reflect heat and multiply the temperature of any vehicle on the ground.

This new vulnerability of the F-35 is likely to give a new meaning to the expression “summer offensive,” as future aggressors will no doubt take the precaution of waiting for summer (or even a heatwave) to attack, knowing their opponents’ F-35s will be unable to take off and oppose them.

The two solutions devised to work around this issue are particularly inspired.

The short-term solution is to repaint F-35 fuel trucks at a cost of $3,900 each (and a week’s work), while the long-term fix is particularly brilliant: build parking shades so the fuel tanks can park in the shade.

These solutions will prove particularly useful to the US Marine Corps, whose rationale for buying the F-35B STOVL variant is the ability to deploy them on beach-heads shortly after the first landing wave. Will Sea Bees now have to plan on going ashore to build parking shades for the fuel trucks before the F-35s can land and troops can get close air support?

The existence of a temperature threshold also raises many other technical questions, the main one being how the F-35’s fuel tanks can function effectively as “heat sinks” (another design innovation) if they are already so sensible to heat that the Air Force fears “possible aircraft shutdowns due to high fuel temperatures?”

Clearly, in addition to runaway costs, an inability to reach contractual performance requirements and recurring delays, the F-35 incorporates many design innovations that, as the world is gradually discover, will end up doing far more damage than the program’s original sin of concurrency between development and acquisition, which was famously but belatedly described as “acquisition malpractice” by a senior Pentagon official.

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Bolovo escreveu:Esse F-35 é o caça mais fresco da história. Tá louco, isso aí foi feito pra guerra?