F-35 Joint Strike Fighter

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Citat: Lockheed Martin reveals F-35 to feature nanocomposite structures (CNRF)

Lockheed Martin has revealed the F-35 Lightning II will be the first mass-produced aircraft to integrate structural nanocomposites in non-load bearing airframe components.

A thermoset epoxy reinforced by carbon nanotubes will replace carbon fibre as the material used to produce F-35 wingtip fairings beginning with low rate initial production (LRIP)-4 aircraft, said Travis Earles, a manager for corporate nanotechnology initiatives.

Meanwhile, the same carbon nanotube reinforced polymer (CNRP) material is being considered to replace about 100 components made with other composites or metals throughout the F-35's airframe, he said.

The shift to CNRP as an airframe material has been anticipated ever since carbon nanotubes were discovered in 1991. It is widely considered one of the strongest materials ever invented - several times stronger than carbon fibre reinforced plastic (CFRP), yet lighter by about 25-30%.

CFRP has come to rival aluminium and steel as a material for primary structures: for instance, Boeing is building 787 fuselage barrels entirely from CFRP material.

But the widespread usage of CFRP for load-bearing components of commercial and military airframes only happened after two decades of development work.

That development cycle began in the early 1970s, when manufacturers began experimenting with glass and carbon fibre-based composites for secondary control surfaces.

Similarly, the introduction of CNRP in non-load bearing structures in the current decade, starting with the F-35, could lead to wider usage in airframe structures as the technology matures.

According to Earles, there is no technical reason the material could not be used in load-bearing structures. However, to reduce certification requirements of a structural material, carbon nanotubes are only being considered in non-load bearing components.

In the meantime, the use of carbon nanotubes is already widespread in industries ranging from semiconductors to golf clubs. The high cost and complexity of producing the structures means they have so far had limited applications in aerospace programmes.

Lockheed, however, has invented a process that dramatically reduces the cost to build carbon nanotube composites for aircraft structures, Earles said. The new wingtip fairing is being made for one-tenth of the cost of the equivalent CFRP component, he said.

Earles declined to describe details of Lockheed's low-cost manufacturing process for carbon nanotube composites. Such particulars are considered trade secrets within the company, he said.

But it is clear that the cost-saving process is a relatively new invention within Lockheed. Earles said it has evolved within the past four years. During the same time period, Lockheed has been active in developing new, low-cost methods for manufacturing airframe structures.

Lockheed was selected by the Air Force Research Laboratory in 2007 to build and demonstrate the X-55 advanced composite cargo aircraft (ACCA), which modified a Fairchild Dornier 328Jet. The fuselage was rebuilt with a new kind of carbon fibre resin that can be cured outside an autoclave, avoiding one of the most costly steps in the production of CFRP materials.

It is possible that the X-55 airframe also benefited from the development work that produced the carbon nanotube composites, which are now being applied to the F-35.

The company is only now publicising the first details about the rapid progress in manufacturing nanostructures for airframes.

A display inside Lockheed's energy solutions centre in Crystal City, Virginia, shows off the F-35's new wingtip fairing derived from nanotechnology.

The material is identified as "advanced polymers engineered for the extreme - first generation", or APEX. It is described within the display as "best-in-class ultra-lightweight and affordable structural thermoplastic enhanced with nanoparticles that delivers increased mechanical properties, thermal stability, electrical conductivity and processability over currently available projects".

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Napisano: 30 Sep 2012 21:18

F-35B BF-03 i F-35C
Septembar 2012



Dopuna: 05 Okt 2012 17:52

^^^^^^^
First U.S. Marine Corps F-35B Joint Strike Fighters perform aerial refueling from KC-130J



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Dopuna: 06 Okt 2012 10:46

Mozda se i oni pridruze raptorima u Japanu

Citat:U.S. Deputy Defense Secretary Ashton Carter said in a speech Wednesday that the Pentagon is considering deploying the F-35 to Kadena Air Force Base, Japan.

“We’ve already deployed F-22s to Kadena Air Force Base in Japan, and we will deploy the F-35 Joint Strike Fighter to the region,” Carter said.

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I sta ce on da radi u "regionu" , da izgleda lepo ?

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Napisano: 06 Okt 2012 14:02

^^^^ Izgledami,ja mu drugu namenu ne vidim tamo.

Dopuna: 06 Okt 2012 16:07




Citat:First U.S. Marine Corps F-35B Joint Strike Fighters perform aerial refueling from KC-130J

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TOP GUN ::I sta ce on da radi u "regionu" , da izgleda lepo ?
Da dominira sa ostatkom ekipe

I dalje, objektivno gledano, vode... Kinezi se imaju jos dosta pomuciti.

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F-35A i Endeavour u vazduhoplovnoj bazi Edwards
Septembar 2012

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Danish Firms Want Bigger Slice of JSF Pie

Citat:“The reality is that the fighter acquisition program is delayed, and even when it resumes, possibly in 2013, there will be two to three other candidate aircraft, apart from the F-35, in contention to win the eventual contract,” he said. “Denmark’s partnership agreement with the JSF never committed the country to actually buying the aircraft.”

The general uncertainty over the country’s fighter replacement program (FRP), and the outcome of any eventual aircraft selection process, is reflected in the slow flow of JSF-related contracts to Denmark thus far, Poulsen said.

A resumed FRP is expected to include four candidate aircraft, including the F-35, Boeing’s F/A-18E/F Super Hornet, Saab’s Gripen-DK NG and the Eurofighter Typhoon.
Citat:
“The acquisition program initially covered the purchase of 48 aircraft,” he said. “For economic reasons, this was reduced to around 30 in 2011. The latest indications from the government suggest that the number will likely to be cut further to 22 before a decision on selection is made in 2014. The actual number will determine the long-term potential for countertrade gains linked to any purchase deal.”

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F-35 Reality Check Ten Years On, Part 2: The Jobs Mirage and Other Stories
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Citat:The truth is that no partner country has a guaranteed work-share on the program. Being an F-35 partner only gives the right to compete for contracts, with no guarantees of winning, and there is no entitlement to any work at all, however much a country has invested, except for major partners Italy and the United Kingdom.
Svaka kompanija za sebe radi posao sa LM.
Citat: Conversely, buying the aircraft is no guarantee of winning any production work, either.
Istina..
Citat:The first contractual anomaly is that all F-35 production subcontracts are drawn up in US dollars, with no compensatory clause in case of major currency variations during the contract’s duration.
Citat:To date, Italy has invested about 1.8 billion euros in the F-35’s development, and another 650-850 million euros (estimates vary) to build the FACO facility which, although to be operated by Alenia Aermacchi, is owned by the state. However, despite this investment, Italian industry is not guaranteed any F-35 production work unless its prices are competitive with those of other countries and of Lockheed Martin.
Italijani su duboko u poslu. A ukupno narućene brojke aviona kažu da su svi koji su se nadali poslu po svetu u minusu.

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Treba još saćekati na prave poslovne rezultate. Tek posle 1.000 prodanih komada će se znat jeli + ili -

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Napisano: 09 Okt 2012 23:22

F-35B BF-17 je stigao u NAS PATUXENT RIVER


Citat:BF-17, part of the third lot of Low Rate Initial Production (LRIP 3) F-35B Lightning II aircraft, arrives at Naval Air Station Patuxent River, Md., Oct. 4. BF-17 will temporarily add to the complement of F-35B and F-35C test aircraft at the F-35 Integrated Test Facility before heading to its destination at Edwards Air Force Base, Calif.

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Dopuna: 11 Okt 2012 16:26

Prvi japanski F-35 se ocekuje 2017 godine

Citat:The first Japanese-produced F-35 is scheduled to roll off Mitsubishi’s Nagoya line in 2017.

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Dopuna: 11 Okt 2012 16:41

TOP GUN ::Ima. Dan ranije pre toga su rekli i sada kazu da kupuju prva 3. Pa ce videt koliko ce ih biti. Ako ih bude. Naravno Lokid i dalje kaze 65 miliona $ za A i 73 za B verziju . Trenutno Italijani navodno placaju Tajfuna 79 miliona $.

Italijani narucili jos jedan F-35

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Dopuna: 16 Okt 2012 23:08

Poleteli su prvi iz cetvrte serije LRIP-4,
ona obuhvata proizvodnju 31kom JSF i
to 10-F-35A,17-F-35B(Jedan za RAF),
4-F-35C.
LRIP-4 F-35B BF-19,BF-20 i F-35A AF-22
Fort Worth,Texas-Oktobar2012