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Moderadores: Glauber Prestes, Conselho de Moderação
O F-35 é um bomb truck de médio porte.cabeça de martelo escreveu:O T-50 fez até agora 2 voos, as várias versões do F-35 já voam à anos. Queres comparar?
Bem, eles tinham igual ao Gripen NG, a tal estimativa.soultrain escreveu:Nesta altura, ainda não terem custo fixo por aeronave, nem eu esperava. E querem vocês que o NG tenha tudo certinho...
http://www.theaustralian.com.au/politic ... 5834053074Scientists warned defence department against Joint Strike Fighter
* Cameron Stewart
* From: The Australian
* February 25, 2010 12:00AM
AN internal Defence study warned that the new Joint Strike Fighter would be a high-risk venture for Australia, admitting that the plane had weaknesses, including poor engine thrust that made it difficult to dodge missiles.
The blunt criticisms of the warplane contained in the study by Defence scientists in 2000 have never been aired publicly by the government.
But the Defence Science and Technology Organisation study, obtained by The Australian, was far more critical of the other fighter jet options available to Australia if it did not choose the JSF.
The document uses highly undiplomatic language to trash the performance of the warplanes used by Australia's closest allies.
The DSTO study, described as a "first-cut analysis" of Australia's future fighter needs, was written two years before the Howard government signed up to the US-led JSF program in 2002, abandoning the tender process and stunning aircraft manufacturers.
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Titled "A Preliminary Assessment of Inhabited Platforms for AIR6000" and written by the DSTO's Graeme Murray and David Carr, the study is significant because it is one of only a handful of studies that looked at alternatives to the JSF.
The government plans to buy 100 JSFs for $16 billion in what will be the largest Australian defence purchase in history.
The DSTO report, written at a time when the JSF existed only on paper, said that if Australia signed on to the JSF program, it would be doing so without knowing the plane's final capability and costs.
"JSF has present serious shortfalls in engine performance and incomplete sensor-fusion capability," the DSTO said.
"The aircraft lacks engine thrust in the baseline configuration due to the high weight, affecting the use of manoeuvrability to defeat missile attack."
It also warned of hi-tech risks in the program because of tight schedule and cost targets, but it gave the plane strong marks for its stealth, range, payload and its "all weather, 24-hour lethality".
It said the JSF would not be cheaper to acquire than other fighters, but would be cheaper to maintain and service.
The study favours the JSF over other options and is blunt about the shortcomings of Australia's other fighter options. It describes the US F-16 used by the US Air Force as having a weak airframe and poor stealth.
"Old airframe lacks agility to outmanoeuvre missiles and has a small internal fuel capacity," the DSTO said of the F-16.
It said Europe's Typhoon fighter had limited strike capability and was unreliable.
"Present (strike) capability is lacking due to limited sensors and weapons carrying capability," it said of the Typhoon.
"Low reliability will mean high costs to operate."
It said Sweden's Gripen fighter had poor stealth, an underdeveloped electronic warfare system and payload and range limitations.
The DSTO found that the earlier version of the F/A-18E Super Hornet -- not the Block II version that has since been purchased by Australia -- was underpowered, lacked endurance and "risks being shot from behind with a radar-guided missile".
The US F-15E lacked stealth while France's Rafale had an unreliable and weak engine.
"The F-15E is good now, but not likely to be defensible in the expected electronic warfare environment in the 2010 timeframe," the DSTO said. "Rafale has short-term shortfalls in engine and radar performance."
The DSTO said the F-22 fighter -- the production of which was recently cancelled by US Defence Secretary Robert Gates -- had limited strike capability and was very expensive.
Despite these criticisms, the study recommended narrowing Australia's choice of a new fighter jet to only three: the JSF, the American F-15E and the French Rafale.
Desencavador MOR do CPLP!P44 escreveu:http://www.theaustralian.com.au/politic ... 5834053074Scientists warned defence department against Joint Strike Fighter
* Cameron Stewart
* From: The Australian
* February 25, 2010 12:00AM
AN internal Defence study warned that the new Joint Strike Fighter would be a high-risk venture for Australia, admitting that the plane had weaknesses, including poor engine thrust that made it difficult to dodge missiles.
The blunt criticisms of the warplane contained in the study by Defence scientists in 2000 have never been aired publicly by the government.
But the Defence Science and Technology Organisation study, obtained by The Australian, was far more critical of the other fighter jet options available to Australia if it did not choose the JSF.
The document uses highly undiplomatic language to trash the performance of the warplanes used by Australia's closest allies.
The DSTO study, described as a "first-cut analysis" of Australia's future fighter needs, was written two years before the Howard government signed up to the US-led JSF program in 2002, abandoning the tender process and stunning aircraft manufacturers.
Start of sidebar. Skip to end of sidebar.
End of sidebar. Return to start of sidebar.
Titled "A Preliminary Assessment of Inhabited Platforms for AIR6000" and written by the DSTO's Graeme Murray and David Carr, the study is significant because it is one of only a handful of studies that looked at alternatives to the JSF.
The government plans to buy 100 JSFs for $16 billion in what will be the largest Australian defence purchase in history.
The DSTO report, written at a time when the JSF existed only on paper, said that if Australia signed on to the JSF program, it would be doing so without knowing the plane's final capability and costs.
"JSF has present serious shortfalls in engine performance and incomplete sensor-fusion capability," the DSTO said.
"The aircraft lacks engine thrust in the baseline configuration due to the high weight, affecting the use of manoeuvrability to defeat missile attack."
It also warned of hi-tech risks in the program because of tight schedule and cost targets, but it gave the plane strong marks for its stealth, range, payload and its "all weather, 24-hour lethality".
It said the JSF would not be cheaper to acquire than other fighters, but would be cheaper to maintain and service.
The study favours the JSF over other options and is blunt about the shortcomings of Australia's other fighter options. It describes the US F-16 used by the US Air Force as having a weak airframe and poor stealth.
"Old airframe lacks agility to outmanoeuvre missiles and has a small internal fuel capacity," the DSTO said of the F-16.
It said Europe's Typhoon fighter had limited strike capability and was unreliable.
"Present (strike) capability is lacking due to limited sensors and weapons carrying capability," it said of the Typhoon.
"Low reliability will mean high costs to operate."
It said Sweden's Gripen fighter had poor stealth, an underdeveloped electronic warfare system and payload and range limitations.
The DSTO found that the earlier version of the F/A-18E Super Hornet -- not the Block II version that has since been purchased by Australia -- was underpowered, lacked endurance and "risks being shot from behind with a radar-guided missile".
The US F-15E lacked stealth while France's Rafale had an unreliable and weak engine.
"The F-15E is good now, but not likely to be defensible in the expected electronic warfare environment in the 2010 timeframe," the DSTO said. "Rafale has short-term shortfalls in engine and radar performance."
The DSTO said the F-22 fighter -- the production of which was recently cancelled by US Defence Secretary Robert Gates -- had limited strike capability and was very expensive.
Despite these criticisms, the study recommended narrowing Australia's choice of a new fighter jet to only three: the JSF, the American F-15E and the French Rafale.
UPDATE 1-Pentagon slips F-35 schedule, reviews costs
Tue Mar 2, 2010 11:22am EST
By Andrea Shalal-Esa
WASHINGTON, March 2 - U.S. Air Force Secretary Michael Donley on Tuesday underscored the Pentagon's commitment to the Lockheed Martin Corp (LMT.N) F-35 fighter program and said the program would likely survive a mandatory live-or-die review triggered by cost overruns on the program.
Pentagon acquisition chief Ashton Carter last week signed an acquisition decision memorandum implementing restructuring steps outlined by top defense officials in recent weeks.
In the Feb. 24 memo, which was first reported by the DODBuzz.com website, Carter said the Pentagon was extending the development phase of the program by 13 months; adding one carrier variant plane for extra testing; and moving a decision about moving into full-rate production to November 2015, when initial operational testing is completed.
Donley told defense reporters the Pentagon was still working through details before notifying Congress about a probable breach of the Nunn-McCurdy cost thresholds that would trigger a review that could lead to the program's cancellation.
But said no "showstoppers" had emerged that could lead to a decision to cancel the program.
There also were no alternatives in the Pentagon's weapons arsenal, he added.
In Carter's memo, he agreed to add $2.8 billion to the development cost of the F-35, and said the Pentagon would withhold $614 million in award fees from Lockheed and the other contractors on the program, Northrop Grumman Corp (NOC.N) and BAE Systems (BAES.L).
Donley said the Pentagon was restructuring its contract with Lockheed to encourage the company to make good its earlier promises on the program and meet the schedule.
He said it was unclear how many additional jets could be purchased of the 122 that were removed from the Pentagon's five-year budget plan.
Carter's memo said the department would request long lead procurement funding for 48 fighter planes in fiscal 2011.
Donley said moves by Lockheed to lower costs on the program would allow the department to buy more aircraft than planned in the fiscal 2011 budget plan, and could allow the military to re-accelerate the now-delayed timetable for moving into full-rate production and operational use of the new planes.
Donley also said he was not aware of any further management changes in the F-35 program "on the government side" after a decision last month to remove Marine Corps Major General David Heinz, who was running the program. He said it was unclear when a replacement for Heinz would be named, but said Senate confirmation was needed since it would now be a three-star position.
Carter and the chief executives of the prime contractors working on the F-35 programs are due to meet at the Lockheed plant in Fort Worth, Texas, later this week.
Donley said the Air Force was considering funding a service life extension program for the Lockheed F-16 fighter planes, given the expected delays in fielding of the F-35, but said not final decisions had been made.
It was not yet clear if any funding for such a program would be added to the fiscal 2011 budget or later budget years, he said. (Reporting by Andrea Shalal-Esa)
Reuters