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 JSF F-35 Lightning II

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MessageSujet: Re: JSF F-35 Lightning II   Mar 24 Nov 2009 - 19:49

Citation :
BAE Systems Welcomes F35 to Paxtuxent River as Vertical Flight Moves a Step Closer


(Source: BAE Systems; issued November 23, 2009)



A BAE Systems led test team has welcomed the short takeoff/vertical landing (STOVL) variant of the F-35 Lightning II (also known as the Joint Strike Fighter) to Naval Air Station Patuxent River, Maryland, for flight testing.

The first F-35B aircraft, designated BF-1, arrived at Patuxent River on 15 November. The Integrated Test Force team at the station will now begin a carefully planned programme of flights that will see the aircraft begin steeper and slower descents before achieving the first true vertical landing by the F-35.

Mick Ord, BAE Systems F-35 Managing Director said: “BAE Systems brings key capabilities to the F-35 programme. These include a unique heritage in short takeoff/vertical landing aircraft gained through the design and development of the Harrier aircraft in the 1960s and early 1970s, which makes us ideally placed to lead these trials. Derivatives of the original Harrier are now flown by the U.K., India, Spain, Italy and the US Marine Corps. The Joint Strike Fighter continues to build on the short takeoff/vertical landing experience, and it’s great to be able to apply our expertise on this tremendous aircraft.”

The move to Patuxent River follows a series of successful hover pit trials conducted at Lockheed Martin’s Fort Worth plant, which demonstrated the STOVL capability of the aircraft. During these trials, BF-1 was anchored on top of a BAE Systems-designed metal grid about 15 feet off the floor of the pit enabling the aircraft to simulate free-air flight.

These tests measured the output of the aircraft’s STOVL propulsion system and demonstrated that the F-35B exceeded the vertical thrust required to carry out its missions. The tests conducted also validated the performance of aircraft software, controls, thermal management, STOVL-system hardware and many other systems.

A key enabler to the move to Patuxent River has been the completion of aerial refueling tests that have cleared the F-35B for extended-range flights. These flights, conducted by the second STOVL variant aircraft, BF-2, demonstrated the aircraft’s ability to refuel in flight using the probe-and-drogue approach favoured by the Royal Navy, Royal Air Force, U.S. Navy and U.S. Marine Corps.

Whilst at Patuxent River the F-35B will also replicate operations aboard “ski jump” aircraft carriers, such as those operated by the Royal Navy using a specially designed ramp.

In March 2009, the U.K. Ministry of Defence announced its intention to order three instrumented STOVL F-35 Lightning II test aircraft and associated support equipment for Operational Test and Evaluation purposes.


BAE Systems is the premier global defence, security and aerospace company delivering a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. With approximately 105,000 employees worldwide, BAE Systems' sales exceeded £18.5 billion (US $34.4 billion) in 2008.

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MessageSujet: Re: JSF F-35 Lightning II   Ven 4 Déc 2009 - 17:23

«Nous n'avons jamais vu, le succès en termes de stabilité de l'avionique et la maturité de ce début d'un programme», a déclaré Ralph Heath, vice-président exécutif de l'unité de l'aéronautique de la compagnie d'affaires.

Citation :

CORRECTED - Lockheed says F-35 fighter excels in test flights

Fri Dec 4, 2009 9:59am EST

WASHINGTON, Dec 3 (Reuters) - Lockheed Martin Corp (LMT.N) said Thursday that its multinational F-35 fighter aircraft, the Pentagon's costliest acquisition program, was performing surpassingly well in early test flight.
"We have never seen, ever, success in terms of avionics stability and maturity this early in a program," said Ralph Heath, executive vice president of the company's aeronautics business unit.
Lockheed, the Pentagon's No. 1 supplier by sales, projects it will sell up to 4,500 F-35s worldwide to replace its F-16s and 12 other warplanes for 11 nations initially. The United States plans to spend about $300 billion over the next 25 years to buy 2,443 F-35s.
Heath said about three-quarters of the jets returning from test flights were ready to go again, a standard he said normally applied to production models, not test planes.
"So it really is a brand-new phenomenon," he told a webcast Credit Suisse aerospace and defense industry conference in New York.
The test flight program is far behind schedule. The development program overall is facing a potential $16 billion shortfall through 2015, according to independent studies commissioned by the Pentagon.
Lockheed Martin agrees with initiatives, floated publicly last week by the Pentagon's chief arms buyer, aimed at getting the program back on track, said Bruce Tanner, the company's chief financial officer.
Tanner said the company had discussed with Ashton Carter, the arms buyer, plowing some of Lockheed's future award fees into putting more aircraft into the test program and speeding development of the mission software.
"We support Dr. Carter with that objective," Tanner told the conference. He did not make clear how much this might cost in terms of foregone profits. Neither the company nor the Pentagon's F-35 program office responded immediately to questions about this.
Carter told reporters on Nov. 23 that he wanted Lockheed to share the cost of preventing F-35 cost overruns and schedule slips.
Lockheed has a "cost-plus" development contract, meaning the government typically picks up the bill for any cost overruns.
Eight countries have helped the United States finance three variants of the F-35: Britain, Italy, the Netherlands, Turkey, Canada, Australia, Denmark and Norway. Together, the core group has been projected to buy about 730 aircraft
A "couple" of these countries are delaying planned purchases of the jet, a move that will boost its initial prices, Jon Schreiber, a senior official in the Pentagon program office, told Reuters on Nov. 23.
Heath, at the industry conference in New York, said Lockheed's view was that the partner countries "remain very solidly supportive of the program."
Competitors include Boeing Co's (BA.N) F/A-18E/F Super Hornet and the Eurofighter Typhoon, made by a consortium of British, German, Italian and Spanish companies.
SOURCE:http://www.reuters.com/article/idUSN0310240720091204?type=marketsNews

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MessageSujet: Re: JSF F-35 Lightning II   Ven 4 Déc 2009 - 17:26

On peu les aider a faire baisser la facture en en commandant une fournée
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MessageSujet: Re: JSF F-35 Lightning II   Mar 8 Déc 2009 - 16:37

-des changements sur le JSF pour reduire les couts?
-l´usine italienne de Cameri verra elle le jour?et a quel prix?Lockheed veut la voir ouvrire vite..

Spoiler:
 

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MessageSujet: Re: JSF F-35 Lightning II   Lun 14 Déc 2009 - 11:32








peut étre qu'un jour on vois voir cet image chez nous :





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MessageSujet: Re: JSF F-35 Lightning II   Lun 21 Déc 2009 - 18:27


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MessageSujet: Re: JSF F-35 Lightning II   Lun 21 Déc 2009 - 18:44

Je l'avais dit un jour, on finira par voir un F-35I...
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MessageSujet: Re: JSF F-35 Lightning II   Mar 29 Déc 2009 - 16:06

Citation :
The United States is considering allowing Japan to take part in a multinational project to develop the F-35 next-generation stealth fighter, a press report said Tuesday.

Washington may allow Tokyo to participate in the project even without assurances from Japan that it will procure the F-35, Kyodo News reported, quoting sources from both governments.

The move is intended to clear the way for Japan to introduce the F-35 as its future mainstay fighter as countries not participating in the joint development would not be allowed to acquire it at an early date, Kyodo said.

Tokyo's participation would be limited to developing components to be provided exclusively to its air defence force as Japan bans weapons and arms-technology exports, Kyodo quoted the sources as saying.

The F-35 is being jointly developed by the United States, Australia, Britain and other countries, Kyodo said.

It is due to be ready for operational use in the mid-2010s. Countries involved in the joint development are expected to be able to acquire the fighter on a preferential basis, the report added.

Japan initially aimed to acquire the US F-22 stealth fighter to replace its aging F-4EJ fighter fleet, but US law prohibits exports of the F-22 and the United States has announced a plan to halt production of the model.

Japan has also studied other models such as the F/A-18 and F-15FX, produced by the United States, and the Eurofighter, produced by a consortium of European manufacturers, as possible replacements for its fighter fleet, Kyodo said.

http://www.google.com/hostednews/afp/article/ALeqM5j2mlTFHDHrEJDHr-dav_QgCuPjog
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MessageSujet: Re: JSF F-35 Lightning II   Mar 29 Déc 2009 - 16:42

Dans ce document officiel américain (premier tableau page 43) il est prévu un coût "fly away Unit cost" de 83 millions $ par F-35 (57,5 millions €), basé sur une production de 1763 avions, alors qu'il était de 247,5 millions $ dans le budget 2007 qui a vu deux avions être construits...

http://www.saffm.hq.af.mil/shared/media/document/AFD-080204-081.pdf
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MessageSujet: Re: JSF F-35 Lightning II   Mar 29 Déc 2009 - 18:14

Rafi par cout dans ce document,on parle de cout de revient ,ou de vente aux participants au programme de
developpement de la machine ? (A la condition d avoir un carnet de commande de plus de 1300) As tu une
idée du nombre de demandes d achats a peu prés ?
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MessageSujet: Re: JSF F-35 Lightning II   Mar 29 Déc 2009 - 18:25

Le coût (de revient) par avion repris dans le document ne concerne que les appareils qui seront construits pour l'USAF. Les plus optimistes comptent sur une commande totale de plus de 3000 F-35, mais au regard de la crise mondiale et de ses effets, qui sait?

L'Italie s'attend à devoir débourser 12,09 milliards de $ pour acquérir 131 F-35 en différentes versions, soit 92,3 millions $ par avion (64,3 millions €) nous dit le magazine "Aviation Week & Space Technology" paru en avril 2009.
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MessageSujet: Re: JSF F-35 Lightning II   Mer 30 Déc 2009 - 0:42

Qand on convertit en Euro le prix du F-35 (prix Italien), on ne lui trouves soudain plus aucuns defauts par rapport aux typhoons ou Rafales.
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MessageSujet: Re: JSF F-35 Lightning II   Jeu 31 Déc 2009 - 0:14

Seguleh I a écrit:
Qand on convertit en Euro le prix du F-35 (prix Italien), on ne lui trouves soudain plus aucuns defauts par rapport aux typhoons ou Rafales.

C'est normal, techniquement le F-35 a tout pour séduire, mais c'est le surcout du programme qui a fait autant d'ennemi de cette mahine qui est ''le bombardier qui accompagne le F-22'' dans la doctrine du USAF, donc doit être pas cher et en dotation en grand nombre...
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MessageSujet: Re: JSF F-35 Lightning II   Sam 9 Jan 2010 - 22:16

Citation :
Lockheed Martin F-35B Begins In-Flight STOVL Operations



09:33 GMT, January 8, 2010 NAVAL AIR STATION PATUXENT RIVER, Md. | The Lockheed Martin [NYSE: LMT] F-35B Lightning II short takeoff/vertical landing (STOVL) stealth fighter engaged its STOVL propulsion system in flight for the first time today. The successful test is the first in a series of planned STOVL-mode flights that will include short takeoffs, hovers and vertical landings.

"The joint F-35 industry and government team has already shown during extended ground tests that the STOVL propulsion system performs well, and thousands of hours of component testing has validated its durability. Now we are seeing early proof that the system operates in flight as our team predicted," said Dan Crowley, Lockheed Martin executive vice president and F-35 program general manager.

The aircraft is powered by a single Pratt & Whitney F135 engine driving a Rolls-Royce LiftFan. The system, which includes a Rolls-Royce 3-bearing swivel duct that vectors engine thrust and under-wing roll ducts that provide lateral stability, produces more than 41,000 pounds of vertical thrust. The F135 is the most powerful engine ever flown in a fighter aircraft.

F-35 Lead STOVL Pilot Graham Tomlinson of BAE Systems took off at 1:53 p.m. EST, climbed to 5,000 feet and engaged the shaft-driven LiftFan propulsion system at 210 knots (288 mph), then slowed to 180 knots (207 mph) with the system engaged before accelerating to 210 knots and converting back to conventional-flight mode. The STOVL propulsion system was engaged for a total of 14 minutes during the flight. Tomlinson landed at 2:41 p.m. EST.

STOVL-mode flights will continue, with the aircraft flying progressively slower, hovering, and ultimately landing vertically. Most STOVL-mode testing will be conducted at NAS Patuxent River.

The F-35B will replace U.S. Marine Corps AV-8B STOVL fighters, F/A-18 strike fighters and EA-6B electronic attack aircraft. The United Kingdom’s Royal Air Force and Royal Navy, as well as the Italian Air Force and Navy, also will employ the F-35B. With its short takeoff and vertical landing capabilities, the F-35B will enable allied forces to conduct operations from small ships and unprepared fields, enabling expeditionary operations around the globe.

The Lockheed Martin F-35 is a 5th generation fighter, uniquely characterized by advanced stealth with supersonic speed and high agility, sensor fusion, network-enabled capabilities and advanced sustainment. The three F-35 variants are derived from a common design, are being developed together and will use the same sustainment infrastructure worldwide, bringing economies of commonality and scale. The United States and eight international partners are planning to buy more than 3,000 F-35 aircraft.

Lockheed Martin is developing the F-35 with its principal industrial partners, Northrop Grumman and BAE Systems. Two separate, interchangeable F-35 engines are under development: the Pratt & Whitney F135 and the GE Rolls-Royce Fighter Engine Team F136.


Arrow http://www.defpro.com/news/details/12356/
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MessageSujet: Re: JSF F-35 Lightning II   Sam 9 Jan 2010 - 22:38

rafi a écrit:
Le coût (de revient) par avion repris dans le document ne concerne que les appareils qui seront construits pour l'USAF. Les plus optimistes comptent sur une commande totale de plus de 3000 F-35, mais au regard de la crise mondiale et de ses effets, qui sait?

L'Italie s'attend à devoir débourser 12,09 milliards de $ pour acquérir 131 F-35 en différentes versions, soit 92,3 millions $ par avion (64,3 millions €) nous dit le magazine "Aviation Week & Space Technology" paru en avril 2009.

Ajouter à cela les 116 F-35 pour la Turquie pour un coût de 10 milliards $..
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MessageSujet: Re: JSF F-35 Lightning II   Dim 10 Jan 2010 - 9:30

86,2 millions $ (soit 59,8 millions €) par unité pour la Turquie. La part des coûts de développement devrait coûter combien au pays, partenaire de niveau 3, et combien sa participation au programme devrait-elle lui rapporter?
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MessageSujet: Re: JSF F-35 Lightning II   Dim 17 Jan 2010 - 14:37

Tiens, la Navy commence aussi à se demaner si le F35 est le bon cheval. On commence à s'apercevoir un peu partout (A400M, F35, NH90...) que de développer x versions d'un même appareil pour satisfaire tous les utilisateurs est surtout générateur de coûts. Jusqu'ici, c'était plutôt une maladie européenne. Elle commence à toucher les US.

Citation :


JSF - Navy Ready To Abandon Ship?
The Navy is not happy with the new joint-service fighter. It's gained weight during development, but more importantly, the Navy isn't sure that the capabilities it provides are what they want to spend more money on. It's tempting to scrap it and go with an alternative, from a company with recent carrier-jet experience. The obstacle is a headstrong Secretary of Defense who's staked his reputation on the joint program, but the signals are clear: the moment he's gone the Navy's going to bail.

Enough about the F-111. What about JSF?

For the service of "loose lips sink ships", the Navy leaked the blandly titled "Joint Programs TOC Affordability" document through more holes than IJN Yamato off Okinawa. This was no baby-seals-type accident. It's a deliberate hit at the highest level.



The key chart is page 10, which shows that - over the lifetime of the fleet - the carrier-based and STOVL JSF versions will cost the Navy 40 per cent more, in total operating costs, than the F/A-18C/Ds and AV-8Bs that they replace. (The older aircraft costs are taken from FY2008 and include a lot of aging-aircraft issues.) This is despite a smaller fleet and fewer flight hours: the new aircraft are expected to cost more than 60 per cent more to fly per hour than their predecessors.

The Navy report suggests that the total cost of the Pentagon's JSF program will be $705 billion in FY2002 dollars, just over twice the figure predicted at the program's inception.

Lockheed Martin and the JSF program office will respond that the Navy figures are conjectural, based on experience with legacy aircraft, and not applicable to the JSF's cutting-edge technology. This matters not a hoot. What matters is that the admirals and senior Navy leaders believe the report is roughly accurate, or it wouldn't be on the street in the first place.

So where are all those billions in extra O&S money going to come from? The answer is "nowhere". When the report states that "JSF will have a significant impact on naval aviation affordability", what it means by "significant" is "about the same as the ten torpedo and seven bomb hits on Yamato."

But wait - there's more. The Navy is not talking exclusively about the F-35B/C. If similar TOC comparisons hold for the F-16, USAF TacAir plans have some challenges ahead. Moreover, the Navy notes an "upward" pressure on the $705 billion - indicating that the program team will be doing well to hold it level.

The Navy is the only US JSF customer with a ready Plan B, in the shape of the Super Hornet. (And GE has developed a thrust boost for the F414 and Boeing has muttered quietly about stealth enhancements.) What would the Navy do about the Marines? That wasn't in the report's terms of reference.

The Navy is not identifying factors behind the per-hour TOC number. However, the JSF is Super Hornet-sized, and bigger than either of the aircraft it replaces. The F-35B includes a complex lift-system full of critical components. And JSF includes stealth technology, which has yet to prove as affordable in service as the engineers promised it would be.

No one presentation or study is definitive, but this latest disclosure places more pressure than ever on the JSF program to perform.

AW

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MessageSujet: Re: JSF F-35 Lightning II   Dim 17 Jan 2010 - 14:54

l US Navy n a jamais reellement supporté le JSF contrairement a l USMC . Les amiraux voulaient un gros batch de Super-Hornet a la place mais elle s est faite forcer la main
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MessageSujet: Re: JSF F-35 Lightning II   Dim 17 Jan 2010 - 19:50

Fremo a écrit:
Tiens, la Navy commence aussi à se demaner si le F35 est le bon cheval. On commence à s'apercevoir un peu partout (A400M, F35, NH90...) que de développer x versions d'un même appareil pour satisfaire tous les utilisateurs est surtout générateur de coûts. Jusqu'ici, c'était plutôt une maladie européenne. Elle commence à toucher les US.

La Navy a depuis toujours était contre le JSF et en faveur du F-18 E/F blk II, ce n'est pas nouveau fremo, ils ont même pensé à un certains moment à développer une version blk III du super Hornet en partenariat avec l'Australie, avec TVC, 20% de poussée suplémentaire, RCS améliorée (peut être même des soutes à armement), boeing parle de la génération 4,75 Rolling Eyes (quiserait tellement performante que pas la peine de commander des 5th gen comme le JSF et économiser les sous pour concevoir un nouvel avion 6th gen Rolling Eyes ) Tel est l'argument de vente de Boeing, mais ce projet a été abandonné au profit du F-15SE.


Dernière édition par Raptor le Jeu 21 Jan 2010 - 23:24, édité 1 fois
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MessageSujet: Re: JSF F-35 Lightning II   Jeu 21 Jan 2010 - 12:57


Citation :

AF chief: F-35 testing, acquisition will slow



The Pentagon is slowing down testing and acquisition of the F-35 Joint Strike Fighter, Air Force Chief of Staff Gen. Norton Schwartz acknowledged Wednesday.
“The path we were on was too aggressive, so there’s an effort underway to reduce concurrency, to lengthen the period associated with testing, to increase the number of test assets and make the production rate somewhat less ambitious,” Schwartz said during a briefing with reporters in Washington.
The F-35 will be ready for initial operational capability with the Air Force in 2013, Schwartz said.
“While it would have been ideal to go without adjustment, there are very few programs of this sophistication that I’m aware of that have not required some adjustment,” said Schwartz. “This is in the larger interest of the larger attack community that will rely on” the jet.
He said the adjustment is meant to ensure that large numbers of F-35s can be built problem-free when it comes time to replace U.S. and allied fighter fleets toward the end of the decade.
Schwartz added that he did not think the jet was going to breach the Nunn-McCurdy statute’s limits on cost growth in weapon programs.
His comments come a week after a leaked Navy analysis document said the F-35 would be considerably more expensive to operate than the Navy and Marine Corps’ current tactical fighters.
“I have not yet had an opportunity to validate for myself the accuracy of that analysis,” Schwartz said, adding that he did not accept the findings of this analysis “at face value.”
Still, he said he acknowledged that operating costs are a serious issue, and that he would be troubled if the analysis turns out to be accurate.
“If there are issues related to cost of operations, we’ll find remedies and mitigations; we have to,” he said.
Many have said that the Pentagon has no choice but to make sure the F-35 program succeeds since the existing U.S. fighter fleet is rapidly closing in on its retirement date.
source:www.navytimes.com

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MessageSujet: Re: JSF F-35 Lightning II   Ven 22 Jan 2010 - 11:39

Citation :

Pentagon underscores commitment to F-35

WASHINGTON, Jan 21 (Reuters) - Deputy Defense Secretary William Lynn on Thursday underscored the Pentagon's commitment to Lockheed Martin Corp's (LMT.N) $300 billion F-35 fighter jet, saying the U.S. government and its allies still planned to buy 3,000 of the new fighters over time.
"We are heavily investing in the F-35. A successful Joint Strike Fighter is at the heart of our continued air superiority," Lynn told industry and military officials at a conference hosted by Tufts University and the Institute for Foreign Policy Analysis.
Draft budget documents obtained by Reuters show the department will request $10.7 billion to continue the F-35's development and buy 42 aircraft in fiscal year 2011, 10 less than initially planned.
The Pentagon "has adjusted F-35 procurement quantities based on new data on costs and on likely orders from our foreign nations partners and realigned development and test schedules," the document said without giving details.
Lynn, speaking to reporters after his speech, acknowledged the program had run into some problems typical of large new weapons programs, but said the department was implementing steps to bring the program back "in line."
He said there was no plan to halt work on any of the three variants of the radar-evading new fighter jet. "There's no thinking of changing that kind of fundamental," he said.
Asked if the program could breach cost thresholds that would trigger a notification to Congress and a life-or-death program review, Lynn said Pentagon officials would address that issue next week.
He said he was aware of reports that Britain could halve its proposed buy of F-35 fighters for an aircraft carrier due to rising unit costs and increased budget pressures, but said the British had not yet made a final decision on the issue.
Lynn said he did not anticipate that any such cuts would increase the unit cost of the new fighters and undermine its business case as a relatively low cost replacement for Lockheed's F-16 and 12 other warplanes.
"There's always going to be puts and takes on orders. I think the fundamental core of the buy is still there -- it's going to be several thousands purchased," Lynn said. "I don't think there's a threat there right now."
A senior Pentagon official told Reuters in November that a "couple" of unnamed co-development partners were delaying planned purchases of the jet, a move that will boost initial prices of the costliest ever U.S. arms purchase.
Eight international partners have co-financed the F-35: Britain, Italy, the Netherlands, Turkey, Canada, Australia, Denmark and Norway.
Northrop Grumman Corp (NOC.N) and Britain's BAE Systems (BAES.L) are Lockheed's key subcontractors on the new fighter.
source:www.reuters.com

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MessageSujet: Re: JSF F-35 Lightning II   Sam 30 Jan 2010 - 17:34

Citation :
Lockheed Strengthening Fuselage in Navy’s F-35 Model

Lockheed Strengthening Fuselage in Navy’s F-35 Model (Update2)
Share Business ExchangeTwitterFacebook| Email | Print | A A A By Tony Capaccio
Jan. 29 (Bloomberg) -- Lockheed Martin Corp. is fixing a structural weakness in the Navy version of the F-35 Joint Strike Fighter that limits the jet’s ability to launch from aircraft carriers, according to a company spokesman.
Engineers in July discovered a “strength shortfall” in an aluminum structure in the aircraft’s center fuselage that helps absorb stresses during a catapult takeoff, Lockheed spokesman John Kent said today in an e-mailed statement.
“U.S. Navy and program office engineers were apprised immediately and have been directly involved in approving design updates,” Kent said. “A modification is already approved and ready to incorporate early this year prior to any catapult testing planned for 2011.”
The modification doesn’t affect the aircraft’s progress toward first flight and is expected to have “little or no impact” on the plane’s shipboard testing, he said.
“There was never a problem with landing -- only catapult launch,” Kent said.
Bethesda, Maryland-based Lockheed plans to build the fighters in three variants for the U.S. Air Force, Navy and Marine Corps. The current estimated cost is $298 billion.
The carrier version is the last of the three variants to go into operation and is scheduled to be used on carriers operating with Boeing F/A-18E/F fighters by 2015. The first development model is scheduled for its maiden flight by August 30, Kent said.
Ashton Carter, the Pentagon’s chief weapons buyer, and Michael Gilmore, director of operational test and evaluation, declined to comment through Pentagon spokeswoman Cheryl Irwin.
Pentagon Report
The issue wasn’t disclosed in Gilmore’s annual’s report released last week. That report said F-35 testing so far raised concerns that engine blasts from the carrier model and Marine Corps short-takeoff and vertical-landing versions could cause deck damage and injure personnel.
The F-35 is the Pentagon’s largest weapons program. The fiscal 2011 defense budget set for release Feb. 1 requests 42 fighters, up from 30 this year. As many as 20 jets are Navy and Marine Corp versions.
Kent said all design changes to strengthen the center fuselage will be incorporated before parts are made for the first production F-35Cs in the fourth initial production contract now under negotiation for 30 aircraft.
This is only a development-phase issue “and a minor one at that,” Kent said. “This is part of our normal airframe development process, and is not a concern for the Navy.”
Cheryl Limrick, a spokesman for F-35 military program manager Marine Corp. Major General David Heinz, didn’t return an e-mail seeking comment today.
The Navy plans to buy as many as 680 carrier and short-take- off versions of 2,456 planned jets.
Deck Damage
The Pentagon’s Gilmore said in his report that the engine and power-systems’ exhaust on the Navy and Marine versions is powerful enough to pose a threat to carrier personnel. The blasts also may damage shields used to deflect heat on the deck, including on the CVN-21 carrier, the Navy’s most expensive warship.
“Early analyses of findings indicate that integration of the F-35 into the CVN-21 will result in damage to the carrier deck environment and will adversely affect hangar deck operations,” Gilmore wrote.
The Navy model’s exhaust area is larger than the Boeing planes’, making the jet-blast deflectors used during launch “vulnerable to warping and failure,” he wrote.
Exhaust from the Marine Corp version’s integrated power system deflect downward and may be “a hazard to flight deck refueling, munitions, personnel and equipment” located on catwalks, the report said.
Lockheed spokesman Chris Giesel said tests conducted with the JSF Program Office and the Navy “are showing positive results regarding compatibility of the F-35’s exhaust with carrier decks and tarmac surfaces. The study will conclude in spring 2010.”
http://www.bloomberg.com/apps/news?pid=20601087&sid=a6gq84TiIFcA&pos=9

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MessageSujet: Re: JSF F-35 Lightning II   Mar 2 Fév 2010 - 12:57

Citation :

Chasseur F35: le Pentagone gèle un contrat avec Lockheed Martin


WASHINGTON - Le Pentagone va geler une somme de 614 millions de dollars qu'il devait verser au constructeur aéronautique Lockheed Martin en raison de problèmes et de retards dans le programme F35, un avion de chasse furtif, a annoncé lundi le secrétaire à la Défense Robert Gates.
"Les performances et l'évolution du F35 au cours des deux dernières années n'ont pas été ce qu'elles auraient dû être", a affirmé M. Gates, qui s'exprimait lors d'une conférence de presse pour présenter le nouveau budget du ministère de la Défense.
"Les critères de performance n'ont pas été remplis", a-t-il insisté.
Le F35 est un avion furtif construit par Lockheed Martin pour remplacer à terme les F16.
M. Gates a dit avoir pris cette décision car "remettre sur les rails (l'avion furtif) Joint Strike Fighter ne doit pas reposer entièrement sur les épaules du contribuable". Il a précisé que cette décision avait été prise en accord avec Lockheed Martin.
Mais le Pentagone est coresponsable des mauvais résultats de ce programme et une nouvelle équipe sera nommée pour en prendre la direction, a ajouté M. Gates.
Le F35 représente le programme d'armement le plus coûteux au sein du budget de la Défense, qui totalise 708 milliards de dollars, et les fournisseurs ont à plusieurs reprises échoué à respecter le calendrier et le budget impartis.
M. Gates, qui n'a pas hésité à démettre de leurs fonctions plusieurs hauts gradés et responsables depuis qu'il a pris les rênes du ministère de la Défense en 2006, a justifié sa décision concernant le F35 en expliquant que "quand les choses vont mal, certains doivent être tenus responsables".
Malgré ces problèmes récents, le programme F35 a été "restructuré" et cet avion devrait "devenir la colonne vertébrale de la supériorité américaine dans les airs au cours de la prochaine génération", a cependant affirmé M. Gates.
Le budget 2011 de la Défense, dévoilé lundi, prévoit d'accorder 10,7 milliards de dollars au programme F35 Joint Strike Fighter, pour 42 avions.
M. Gates a par ailleurs indiqué qu'il recommanderait au président Barack Obama d'opposer son veto à toute tentative du Congrès pour financer la recherche d'un autre moteur pour le F35 ainsi que de nouveaux avions de transport militaire C17.
Les bénéfices qu'apporterait la construction d'une alternative au moteur du F35 seraient "annihilés par des coûts excessifs, une trop grande complexité et les risques associés", a-t-il dit.
Quant aux C17, les études montrent que l'armée de l'Air américaine en a déjà "plus qu'il ne lui en faut".
http://www.romandie.com/infos/news2/100201203423.7fru8fxv.asp

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MessageSujet: Re: JSF F-35 Lightning II   Mar 2 Fév 2010 - 17:17

en réaction à l'apparition du Pak-Fa... la course contre la montre à commencer il faut rattraper le retard et arrêter l'hémorragie du surcoût causé par le retard du programme JSF

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MessageSujet: Re: JSF F-35 Lightning II   Mer 3 Fév 2010 - 0:59

FAMAS a écrit:
en réaction à l'apparition du Pak-Fa... la course contre la montre à commencer il faut rattraper le retard et arrêter l'hémorragie du surcoût causé par le retard du programme JSF

La véritable menace pour le Pak-Fa c'est le F-22, le JSF est certes polyvalent comme le Pak-Fa mais il n'a pas suffisament de potentiel Air/Air pour tenir face à cet avion et c'est le F-22 qui est destiné à dominer les cieux dans la stratégies de l'USAF. N'oublions pas qu'à l'origine le JSF était sensé être le petit chasseur pas cher bon à tout faire mais excellent en rien, et en dotation en grand nombre pour faire toute sorte de mission sous protection du F-22... Maintenant c'est vrai que le JSF tel qu'il a été conçu est devenu un chasseur très complexe au point que certains oublient qu'il n'a jamais été question d'en faire un chasseur très performant.

Si le programme Pak-Fa réalise des avancées considérables rapidement on assistera peut être à une renaissance du programme F-22, la bête étant déjà en service, il sera facile d'en développer un nouveau standard plus meurtrier!
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