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F35C unable to land on carriers

Discussion in 'The Americas' started by Picard, Jul 29, 2012.

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  1. Picard

    Picard Lt. Colonel RESEARCHER

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    Mission Impossible: F-35C jet fighter unable to land on carriers — RT

     
  2. Averageamerican

    Averageamerican Colonel ELITE MEMBER

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    In real life::::


    F-35C tailhook design blamed for landing issues




    By Dave Majumdar - Staff writer
    Posted : Tuesday Jan 17, 2012 20:59:22 EST



    Lockheed Martin has traced the Navy F-35C Joint Strike Fighter’s troubles with catching a carrier’s arresting gear wires to the tailhook design.

    Efforts to fix the problem are well underway, a top company official said.

    “The good news is that it’s fairly straight forward and isolated to the hook itself,” said Tom Burbage, Lockheed program manager for the F-35 program. “It doesn’t have secondary effects going into the rest of the airplane.”

    Moreover, the rest of the design of the tailhook system, which include the doors and bay that conceal the device and other ancillary hardware, is sound, Burbage said.

    “What we are trying to do is make sure that we got the actual design of the hook is optimized so that it in fact repeatedly picks up the wire as long the airplane puts itself in position to do that,” he said.

    A preliminary review has already been completed and was done in conjunction with the Naval Air Systems Command and F-35 Joint Program Office.

    Burbage said the hook system is already being modified in accordance with the new test data.

    “We’re modifying the hook to accommodate what we found so far in test,” Burbage said. “The new parts, we expect to have them back in the next couple of months.”

    Tests with the newly modified tailhook should start at Lakehurst, N.J, in the second quarter of this year, Burbage said.

    That will give the F-35 program another set of data to study to make sure the new design works as promised. However, until those tests are done, there is no ironclad guarantee that the redesign of the tailhook will work, but Burbage said he is confident of that the modified design will be successful.

    “The big test for this airplane is not until the summer of ’13 when we take the Navy jet out to the big deck carrier and do actual traps at sea,” Burbage said.

    Burbage dismisses claims that the F-35C will be unable to land on a carrier as falsehoods.

    “That’s patently not true,” he said.

    Richard Aboulafia, an analyst at the Teal Group, Fairfax, Va., said the claim that the F-35C could never land on a ship was always highly dubious.

    “They turned the YF-17 into a carrier plane, why couldn’t they correct carrier-hook problems here?” he said. “This does not appear to be a killer problem.”

    Flight testing is designed to uncover and fix problems with a new aircraft, Aboulafia said.

    “This is the kind of problem that might come out during the flight testing of a carrier-based plane,” he said.

    Aboulafia added that the F-35 is an extremely ambitious program with its three variants — technical problems are par for the course.

    The reason the problem with the hook arose in the first place is because of the inherent constraints of building a stealth fighter, said Burbage. The F-35 is the first naval stealth fighter and as such, Lockheed had the unique challenge of designing the jet with a tail-hook that had to be concealed when it’s not being used.

    Because the tail-hook has to fit within the outer mold line of the F-35, the device had to be fitted further forward on the jet’s ventral surface than on other naval aircraft, Burbage said. The result is that the hook behaves differently than on previous fighters like the F/A-18.

    In an ideal world, an arresting-hook will catch a wire 100 percent of the time, however in the real world that doesn’t happen due to various dynamic forces, the veteran former Navy test pilot said.

    In the case of the F-35, one of those dynamic forces includes the way the wires react when the jet passes over them. The wire reacts in a sine wave pattern, Burbage said. “The time differential between when the main gear rolls over the cable and the time the hook picks up the cable on a more convention airplane, there is more time for that wave to damp out,” he said. “In the case of the F-35, one of our design constraints is that hook just has to be closer to the main landing gear than on a conventional aircraft because of the requirement to hide it inside the airplane.”

    Another factor that effects landing on a carrier is the sheer force of the impact from a carrier landing. Unlike conventional land-based aircraft, naval aircraft don’t flare on landing. While the landing is on a more precise spot, it causes the tail-hook to oscillate vertically- which increases the chances that it won’t catch a wire, Burbage said. The dampening of that motion has to be tweaked, he said.

    The shape of the hook itself also has an effect on the probability of catching a wire, he added. All of these are being tweaked to increase the chances that the F-35C will catch a wire on a carrier’s deck.

    “We’re doing a redesign of the hook to increase the probability the hook will engage the wire a high percentage of the time,” Burbage said.
     
  3. Picard

    Picard Lt. Colonel RESEARCHER

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    Oh, I'm sure they'll fix it. But how much is it going to cost? I mean, they're kind of people that make hobnail cost $5 000.
     
  4. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    USAF AWACs have fireproof ashtrays costing $600/- each. They shud have imported them from India for just about $2/- each or just put some water in them to extinguish the flame. I am a smoker. When I flew as a commercial pilot thats what i did. Carry an ashtray of my own in the aircarft, put some water in it to ensure that in case of pressurisation failure when oxy masks are deployed, thr is no flame to ignite the oxygen. The moment you put your cig in water, it extinguishes.
     
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  5. booo

    booo Lieutenant FULL MEMBER

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    Now they will ask money to fix the bad design, just like got paid to investigate the oxygen problem in f22. gotta agree that LM guys know how to make money. :lol:
     
  6. Picard

    Picard Lt. Colonel RESEARCHER

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    I remember reading something about plasma missile defense shield. US spent billions of USD trying to develop system to shoot plasma toroids. Russians developed laser/microwave based system which created plasma by heating atmosphere - for few hundred million USD at most.
     
  7. Skull and Bones

    Skull and Bones Doctor Death Staff Member MODERATOR

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    Russians used microwaves to create a layer of plasma around the aircraft, and that thing can hide a whole Boeing-747 without a blip in the radar. There were rumors that PAK-FA will field such systems, but nothings confirmed till date.
     
  8. Firemaster

    Firemaster Captain STAR MEMBER

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    Would plasma not have its own IR signature?
     
  9. Skull and Bones

    Skull and Bones Doctor Death Staff Member MODERATOR

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    It'll have it's own heat signature, as the gases around it will be ionized. And the method of ionization matters, microwave or high temperature. And the plasma around the aircraft will decrease friction with the atmosphere, so hard to tell. :undecided:
     
  10. Averageamerican

    Averageamerican Colonel ELITE MEMBER

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    I highly doubt that Russia has any thing we have not got, the russians are behind on the development of their S500 missile program because so many of their engineers are heading to europe and the USA. S-500 Is Dying From Brain Drain
    by James Dunnigan
    March 6, 2012

    When the USSR broke up into 16 differant countries, no one was loyal to the USSR or Russia any more.
     
  11. Picard

    Picard Lt. Colonel RESEARCHER

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    I know they were working on it... is it deployed operationally, or is it still in prototype stage?
     
  12. Picard

    Picard Lt. Colonel RESEARCHER

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    Plasma is basically air with free-floating electrons... which translates into extremely hot. (Plasma = ionized gas; and you know what ions are).
     
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