Sources: Flight suit could be cause of oxygen loss in F-22 flights
June 13th, 2012
07:45 PM ET

Sources: Flight suit could be cause of oxygen loss in F-22 flights

By Mike Mount

Air Force investigators believe a specialized flight suit could be partially responsible for some pilots experiencing a lack of oxygen while flying the F-22 fighter jet, according to a report by Air Force investigators.

Investigators are focusing on part of the suit, called the "Combat Edge," which hampers breathing and causes oxygen loss when combined with a physiological condition that collapses air sacs in the lungs, according to details of the report that were shared with Security Clearance.

The findings are expected to be part of the first monthly update by Air Force investigators to Secretary of Defense Leon Panetta to be delivered later this week or early next week, according to sources familiar with the investigation.

Last month, Panetta ordered the updates on the investigation after the Air Force could not identify the cause of the continued issues with pilots complaining about coming close to passing out while flying the plane, which the service called "hypoxia-like symptoms."

Combat Edge is a vest-like garment that expands and contracts on a pilot's torso to fight the effects of severe G-forces experienced while flying the F-22. The problem being looked at is that the garment may restrict the pilots' breathing beyond what is intended, according to sources familiar with the report.

Another possible problem for pilots, the report is expected to say, is a condition called acceleration atelectasis, which causes a pilot's lungs to not effectively deliver oxygen to the bloodstream. The condition for F-22 pilots is caused when extreme gravity and breathing almost pure oxygen in the F-22 cockpit partially collapse air sacs in the lungs, according to the sources.

Acceleration atelectasis causes a heavy cough, which F-22 pilots have called the "Raptor cough" after the nickname of the fighter, "Raptor."

Pilots have complained about the cough in connection with the hypoxia-like conditions as they fly the F-22, the most technologically advanced plane in history, often at altitudes much higher than regular aircraft fly. The pilots also perform maneuvers that put their bodies through extreme conditions.

In an e-mail response to questions by Security Clearance, Air Force spokesman Lt. Col. John Dorrian said, "Recent testing has identified some vulnerability and reliability issues in the upper pressure garment worn by F-22 pilots. Air Combat Command has directed pilots to remove the upper pressure garment during routine flight operations, and Air Force officials are developing a fix to overcome the identified issues."

The findings in the update report to be given to Panetta are not final, according to the sources. Air Force officials say investigators are narrowing down the cause of the problem, which has intermittently plagued the aircraft since 2008.The problem compounded in September 2011 as more pilots complained of experiencing the symptoms.

The Combat Edge problem does not explain why some mechanics have also suffered from hypoxia while working on the planes on the ground.

The fleet was grounded in May 2011 so the service could check the hypoxia reports, but the order was lifted in September under a "return to fly" plan, with equipment modifications and new rules including daily inspections of the life-support systems.

Investigators initially pointed to an onboard oxygen generating system that pilots used to breathe as a possible cause.

Lockheed Martin, the maker of the jet, was given a $19 million contract to install a backup oxygen system in the F-22 last week.

Last month, Panetta mandated that all F-22 flights "remain within the proximity of potential landing locations" to ensure the ability to recover and land should a pilot run into "unanticipated physiological conditions."

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Filed under: Air Force • F-22 • Military
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  60. JET

    The "oxygen problem" story could be likely cover for a problem they do not want to expose – caused by the warfare electronics.... and if they did talk about it, the discussion could bring up dangers in civilian exposure to similar "fields" – electromagnetic, etc.

    June 15, 2012 at 8:28 am | Reply
  61. dreamer96

    Ground crew does not wear a flight suit...so they have not found the real problem yet..

    June 14, 2012 at 12:17 pm | Reply
  62. Tom

    Once again, Honeywell has successfully deflected the blame away from their oxygen generation unit.

    June 14, 2012 at 10:58 am | Reply
  63. Scuba diver

    sounds a lot like what happens when breathing Nitrox (oxygen enriched air) under pressure. You can't go below 130 ft since oxygen is toxic at those pressures...I'd think that at multiple G forces breathing pure O2 would have a similar effect....

    June 14, 2012 at 9:55 am | Reply
  64. Eagles Rule

    Build more/updated F-15C's. Proven war machine 104-0, just saying.

    June 14, 2012 at 9:28 am | Reply
  65. DenvMike

    So a flight suit huh? How does that explain the ground crews that also reported this issue? No sorry, don't buy it. Doesn't pass the simple logic test.

    June 14, 2012 at 9:24 am | Reply
  66. Jetjockey

    First, Combat edge is not a flightsuit, its an overgarmet, second, it is impossible for it to constrict total lung function, nice disinformation but nobody will buy that unscientific conjecture.

    June 14, 2012 at 9:00 am | Reply
  67. mercenary76

    time to consider other manufacture of warplanes , american suppliers cost too much and produce substandard results . they also play cya to the tune of millions of dollars after they screw up . seems that the g forces experienced are nearly at the limits of human tolerance too . it may be time to consider either uav use and or liquid immersion environments for pilots .

    June 14, 2012 at 8:41 am | Reply
  68. Eddie is a War Plane

    Eddie is a War Plane, Eddie must have targets.

    UCAV – Tinman

    June 14, 2012 at 8:16 am | Reply
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  69. SayanIndia

    Cover Up!! Period.

    Nice photograph though.

    Sayan.

    June 14, 2012 at 8:13 am | Reply
  70. GYRO

    At $412,000,000 each – I'd recommend it's time to weld the seats into the plane. There was a time when the jet was disposable – "we can build more – we can't replace you". I'd suggest that it's easier to replace the pilot today than a $412,000,000 fighter. Everyone else seems to manage without the ACES II – maybe it's time for the fighter guys to figure out how to save their jet or ride it in?

    June 14, 2012 at 7:48 am | Reply
  71. Kenny

    Maybe we should ask the Chinese how they solved the problem on their F-22 design they borrowed from us. I grew up in the 1960's when we made things in this country and didn't outsource anything. Today about the only things that are still "Made In America" are babies and half of them are Chinese and Mexican babies.

    June 14, 2012 at 6:39 am | Reply
  72. wasapliot

    what happen to the report of the 11 plus mechanic experiencing "hypoxia-like symptoms."
    during ground runs,? $140 million design flaw....

    June 14, 2012 at 6:35 am | Reply
  73. airtorn

    The Combat Edge system has been used by the F-16 community for at least the last two decades. I have trouble believing that it is suddenly causing problems.

    June 14, 2012 at 5:11 am | Reply
    • Pricy

      Ed Sizemore Posted on How does the fact the Heidi's blog is hosted by Publisher's Weekly afecft what your saying? Given that Publisher's Weekly is a news organization, this seems to blur the lines between private webpage and corporate web columnist significantly. If Heidi is writting The Beat as a Publisher's Weekly employee, then the argument changes significantly.

      August 1, 2012 at 3:05 pm | Reply
  74. JetFlyer

    This situation is easy to test: simply fly the Raptor within the normal test envelope of, say an F-16, for several months and see if the hypoxic symptoms persist. If so, then the typical F-22 stresses on human anotomy are not to blaim, but some other substance that the pilots are exposed to.

    June 14, 2012 at 4:13 am | Reply
    • AirForceDude

      agreed

      June 14, 2012 at 9:15 am | Reply
  75. Dr (Col Ret) Jerry LeMieux

    Can you say Unmannned F-22?

    June 14, 2012 at 3:54 am | Reply
  76. Gonzoinhouston

    Part of the problem is that the investigation is being done by the AF and the contractors, the people who have the most reason to play CYA. Call in an impartial outfit like the NTSB and you might get results

    June 14, 2012 at 2:29 am | Reply
  77. Easy E

    Why on earth are they using pure O2 anyway? Everyone else who breathes SCBA gases NEVER use pure O2, for good reason (not least of which is fire safety...look at what happened to NASA Apollo 1). I don't see why they don't just add in a blend of nitrogen. Ever heard of Nitrox? And I agree with a some of these other posters here, it sounds to me like either the composite structure and/or nanostructured RF absorbing paint might at least partially be to blame, it's at least worth checking.

    June 14, 2012 at 2:19 am | Reply
    • JD

      In a nutshell, (aircraft) weight and (system) duration are two of the prime factors for pure O2 being used...

      June 14, 2012 at 9:39 am | Reply
  78. rotorhead1871

    F22 needs a LOX system...they are at the limit of physiology....makes a good case for UCAV'S

    June 14, 2012 at 12:35 am | Reply
  79. disgustedvet

    Perhaps the administration should ask our friends in China how they address this issue in the F22 clone they supposedly have.

    June 14, 2012 at 12:26 am | Reply
    • Bill Duke

      theirs is barely flying.

      June 14, 2012 at 1:17 am | Reply
      • TOP CAT

        They will pass us up.thers will work better. there use to be a time when people of the usa took pride in the fact that we had the tallest bulding , longest brige , fastest plane ,fastest train and so on.We dont care any more and next thing we get a ass handed to us.

        June 14, 2012 at 2:50 am |
      • Real McCoy

        TOP CAT, if we wanted the opinion of primitive communists that had to copy everything in their whole country from outside their borders we'll let you know. Go eat some gutter soup or melanine milk or whatever it is you eat in your commie hell hole.

        June 14, 2012 at 3:27 am |
      • Real McCoy

        Despite what your government tells you, your country invented NOTHING of importance ever since you were communist led. So go back to begging us for our tech or stealing it, because you are worthless.

        June 14, 2012 at 3:28 am |
      • Zachary

        Ugh... I hate all these arguments about "Such and Such country has to copy us" and "This thing is a clone of our original" that pop up so often when Military Aviation is the issue. Simple fact is, if you have the most advanced aircraft in the world that fills one of the most vital roles in warfare, everybody else will have to play catch up just to remain a threat. Aerodynamics and the interaction between Electromagnetic Energy and physical matter doesn't magically change from one part of the world to the next. So if we design an aircraft to be as aerodynamically and detection avoidance efficient as physically possible, then any country or company with the same goals in mind for their own designs will undoubtedly arrive at a similar shape. Variation in design will come as a result in variation in priority. The F-22 is much more aerodynamically designed because the priority was stealth. The PAK-FA sacrifices some of that stealth in favor of more favorable aspects for maneuverability. The Chinese are simply a full generation behind in their own domestic development (To which they freely admit) and so their design's likely going to be a more Jack of all Trades in balancing speed, stealth and maneuverability due to their lack of research in Radar Cross-section oriented design's effect on Aerodynamics.

        June 14, 2012 at 4:30 am |
  80. Craig

    So, the other information aside, LM has been given a multi-million dollar contract to add new stuff to the plane, because the old stuff which they built doesn't work. Somebody...anybody...tell me why this an acceptable way to operate. I'll check back from time to time, but I doubt business not selling to the government could do business this way. Anywhere else, you'd be told "...fix it so it works, or you don't get paid for anything...and we're not paying more to get you to do it right."

    June 14, 2012 at 12:04 am | Reply
    • Arnie

      That's because you're simple minded and like so many others on here, want to believe there's always a 'simple fix'. When you push the bounds of technology these are the kinds of problems you encounter. You fix them, and move on. Painful? Yes. Expensive? Most of the time? Worth it? To rule the skies in peacetime and conflict? No question.

      June 14, 2012 at 12:18 am | Reply
      • glennrobert

        This plane is a 20 year old design. Combat ready, right? Even the concept is obsolete. It goes on swallowing money.

        June 14, 2012 at 1:57 am |
      • Mark

        SHeesh, why don't you lick the marketing brochure too. No one is arguing that the cutting edge bears risks, nor are they suggesting "simple fixes"....the fact remains they built it, they designed it, and they should fix it – or we end up footing the bill for an overpriced paper weight. the Raptor has had its share of problems, many allied nations don't even want to buy it, but trying to deflect by insulting others is just juvenile – and most of us can see through the spin.

        June 14, 2012 at 2:29 am |
      • Trevor

        Glenn- Its obvious you've never seen the Raptor perform at various exercises around the states...I've been to Red Flag on numerous occassions and the Raptors OWN the Aggressors everytime they fly. The Aggressors at Nellis are the most higly trained pilots in the world and fly both the F-16 (Blk 30) and MSIP 15Cs that are no "slouches". The only thing that held back the Raptors for dominating the entire vul time (ie: time from Blue Air "push" [ingress] to Blue Air "safe" [egress]) was running out of fuel and missles. Finally, the Raptors also for OPSEC reasons don't operate in the "wartime mode" during these exercises or it would be even uglier for the Aggressor pilots. Obsolete? The Raptor has a significant advantage over any Su-30/35, Gripen or Rafale in service and a healthy advandage over the Typhoon. Again, obsolete? Not even close.

        June 14, 2012 at 4:22 am |
      • Craig

        I didn't say there was a simple fix, nor am I particularly simple-minded. What I said was that the company that built the planes claimed they supplied a functional aircraft that met the specifications supplied by DoD. They got paid for doing that. Now, it appears, they didn't. Assuming they are responsible for their actions, which, unfortunately, most big companies never are, they should stand up and fix the thing...without additional payment.

        Now, if that's your definition of "simple minded" then I suspect you get taken a lot. You buy a car, it doesn't work, so you take it back and offer to pay more...to the same outfit...to get the same car but actually functional? Nope. You wouldn't and I wouldn't either. Why does the government? And, for the record, providing breathable air to a pilot in a high-performance aircraft isn't a new concept. It's been around since...well...before WWII. While the various methods might have changed, the idea is still pretty much the same. The pilot needs oxygen to function, and there isn't enough in the ambient air at higher elevations, so that means you create some system to provide it. Heck, we learned about that when we were taught HALO jumping techniques, and that was clear back in the 60's.

        So, if you think demanding that a company produce a usable product is "simple minded" then I guess I'd agree. If, on the other hand, you think a company should be allowed to produce a non-functional product, get paid, and then demand or expect to get paid more to fix the non-functional product so it actually does what they claimed it did, I'd say you should get a job in procurement at DoD, because no other company or individual is going to work that way. I reminds me of the last time I had to renew my passport. I went down, paid the fee, and they lost it. When I showed up with my receipts and cancelled checks, they told me that if I submitted another application...with another fee, I'd get my passport. I declined, and told them they'd been paid for the work, and they were obligated to either refund the original fee or produce what they'd been paid to produce. They were...dumbstruck, and remained that way until my Senator's office called them and explained things further. Oddly enough, they then immediately located my original application and managed to process it. We get the government we deserve, and if we allow this, then...we deserve it.

        June 14, 2012 at 6:59 am |
    • Herby Sagues

      I see your point, but these are no car salesmen. If you are asked to build a cutting edge, never built before, extremely expensive thing, you, as a businessman, have two possible approaches. Either pad the cost up massively up-front, so you can cover any unforeseen incremental cost (which WILL be there, you just don't konw how much it will be) or you can put a contract that says that, once you deliver the plans for the product and they are approved, you are not responsible for the cost of design changes, even if due to errors in design.
      It would be nice if someone made an offer that didn't include either of those, but no sensible businessperson would do it. If they did, they would be out of business very soon, and future projects would be in the hand of those that planned better.
      So no, this is not evil, nor unfair, nor abusive. It is the only way it can be in cutting edge, uncharted territory business, which is where the US Air Force wants to be.

      June 14, 2012 at 12:38 am | Reply
      • glennrobert

        Is this really supposed to be cutting edge?

        June 14, 2012 at 1:59 am |
    • Easy E

      Craig: because that's how corporate welfare works. The entire DoD acquisition system is not just dysfunctional, it is guaranteed to result in "food chain" projects that drag on forever. There is no incentive (yet) for contractors to deliver weapon systems on budget, on time, etc. because they have MASSIVE infrastrcuture and labor cost structures to support. all of this will end soon enough, though, because the MIC and financial services parasites have bled the host (US Govt) dry, and our resulting Greece-like collapse is coming soon.

      June 14, 2012 at 2:03 am | Reply
  81. Zooni

    This is just another distraction from the real truth. The composite materials that make up the plane are toxic. If the issue was the flight suits all the cases of ground crew getting sick would not be present as they don't wear flight suits.

    June 13, 2012 at 11:41 pm | Reply
    • Herby Sagues

      Soooo, you have information that no one else have? Amazing. Can you publish it on Wiki Leaks so the rest of us know?

      June 14, 2012 at 12:39 am | Reply
      • Bill Duke

        Zooni gets his info from comic books so it must be true.

        June 14, 2012 at 1:18 am |
    • Joe

      Good point - the ground personnel had problems when breathing during maintenance. Solve that first. Perhaps more than one root problem.

      June 14, 2012 at 12:56 am | Reply
      • Xtian

        It is a major problem, but in the epelxmas that you have given it takes no time at all for them to respond to just acknowledge they have received your email / enquiry and get back to it as soon as poss, and if they haven't had a chance to get back to you properly for a while to just send an update to you.

        September 11, 2012 at 12:42 am |
    • Juxsaposs

      The OBOGS Is out sourced to England by the same Corporation that KILLED 5k residence in India(about 30 yr ago)then Bought a new name and cares only about PROFIT. The CEO of this Corporation spends as much time with Barak as Michelle does.

      Yes, their products Look very good on Paper, but from personal experience do not handle deviations from perfection at all. If only We lived in a perfect World!

      I say "look at Obamas Buddy for Both the problem and the Cover-UP"!!!!

      June 14, 2012 at 10:05 am | Reply
  82. Tony

    I was interested to read that some of the composite materials that are used in the construction of the F-22 (particularly those related to it's reduced radar cross signature) could be what's contributing to the issue. Some have known toxic qualities, and once heated, maybe they give off toxic fumes or something. this would account for both the ground crew and the pilots' health issues. I think i read it on wikipedia, but it was cited, and it makes perfect sense.

    June 13, 2012 at 11:29 pm | Reply
    • cja

      How does this toxic outgassing get into the pilot' air supply. the pilot has amass to supply breathing gas.

      June 13, 2012 at 11:49 pm | Reply
      • Herby Sagues

        Right, these planes are not heated by exhaust gasses like a passenger plane. All oxygen and habitacle gases are packed inside tubes. Since interior cabin is WAY higher than exterior cabin during any flight at considerable speed If there was any connection between the exterior and the interior air would be leaking out, not in. So no, it is almost impossible that the pollutants (if there are any) are coming from the outside. That could explain the dizziness some of the mechanics are experiencing, but not that of the pilots.

        June 14, 2012 at 12:42 am |
      • Arm chair engineer

        Possibly transdermal but I'm sure that theory has been tested.

        To several of the negative complainers out there: I want the defense contactors to be accountable as much as possible on production and support costs as the next guy but at the end of the day I would rather be the Top dog in this global tactical rat race than being a soft target for the bad guys. If we don't stay ahead of the game they will be on us like pitbulls.

        June 14, 2012 at 3:25 am |
  83. ABDULLAH THE BUTCHER

    MOAR DROANS PLZ

    June 13, 2012 at 11:25 pm | Reply
  84. Viper Driver

    All F-16 & F-15 pilots used to wear the Combat Edge vest up until a few years ago with no ill effects.

    This whole thing is a red herring–"These are not the droids you're looking for..."

    June 13, 2012 at 11:20 pm | Reply
    • res65

      missile evasion is possibly the reason g force testing is so strenuous

      June 13, 2012 at 11:53 pm | Reply
    • Herby Sagues

      An F22 can produce much higher Gs than an F-15 or an F16, so these are modified suits with higher operational pressures. Also, these suits have elctronic controls, and the programming might be wrong for the aircraft's patterns.

      June 14, 2012 at 12:43 am | Reply
  85. Malcolm

    Why the need for extreme G-forces? Who is there left to dog-fight anymore? It sounds like to me the generals are still intent on fighting the last century's wars.

    June 13, 2012 at 11:20 pm | Reply
    • Herby Sagues

      On a regular plane, I would say "to evade missiles". But since this plane has the radar cross section of a small bullet, it is probably over-designing the thing.
      Now, if we talk about fighting last century's fith, the whole plane is a waste. Why spend hundreds of millions of dollars building MANNED planes that are less agile, more vulnerable and more dangerous than unmanned planes that could cost a fraction of that money?
      They could build a much smaller, equally powerful, remotely controlled manned plane for 10% of what these things cost.
      I guess it's a direct result of pilots making the decission. They are the only ones qualified for making the decision and at the same time they are the ones that are less impartial at doing it.

      June 14, 2012 at 12:49 am | Reply
    • FrmrMaint

      research the 'fighter mafia' you will understand the need to dogfight. The need to be maneuverable and the need for aerial superiority.

      June 14, 2012 at 12:59 am | Reply
    • Bill Duke

      Sounds to me like Malcolm needs to get a clue.

      June 14, 2012 at 1:19 am | Reply
    • HornetDriver

      To be completely honest with you, there really isn't a need for sustained g's above 5. I can't speak for the F-22 (I would imagine that it would still apply) but the F-18E/F models perform great in all situations with 5 g's or less. Legacy/Super Hornets have g limiters at 7.5 g's and I RARELY get close to that level. However the limiter can be turned off and up to 9 sustained g's are possible. But above 6 or 6.5 g's it gets really uncomfortable so most pilots, in the Navy at least, don't pull those kinds of g's.

      June 14, 2012 at 3:48 am | Reply
      • Falconfixr1

        "HornetDriver" – I will give you this, as it has been some time (5 years) since I have worked a fighter with integrated avionics....please explain this "g-limiter" you speak of. It is interesting to me, as I have been on the maintenance end of aircraft that have over-g'd. I only ask because I would like to know the manufacturer of this avionic component...the g-limiter.

        July 8, 2012 at 5:07 am |
  86. The Left Wing

    Are the G forces experienced in flying an F-22 substantially greater than those experienced in an F-16 or F-15? Is a different flight suit needed?

    June 13, 2012 at 11:04 pm | Reply
    • Cheese Wonton

      It flies much higher, tens of thousands of feet higher, than other existing combat jets. That could be a difference.

      June 13, 2012 at 11:10 pm | Reply
    • Jt_flyer

      The f22 has vectored thrust. The two jet exhaust nozzles change angles which allows the aircraft to perform very unique and stressful maneuvers other aircraft can't.

      June 13, 2012 at 11:21 pm | Reply
  87. grege

    Pilots have been subjected to the same forces in other jets such as the F-16 and so forth. What is different about the Raptor? Only the way the oxygen is produced, as far as I've heard. I remember seeing pilots in 'g-suits' back in the 50's

    June 13, 2012 at 10:53 pm | Reply
    • Darren

      Grege, if you've ever seen an F-22 flight demonstration, you'd know that these pilots are pulling way more G's than the F-16 pilots. The vectored thrust simply puts a strain on these guys like never seen before.

      June 13, 2012 at 11:13 pm | Reply
  88. airhead

    Check for Gremlins under the wing.

    June 13, 2012 at 10:33 pm | Reply
  89. Ron

    Pilots need to ware a spacelike suit with air surounding the body under pressure, A helmut that is sealed to the suit with oxygn pressure, that way G pressure won't be a problem!!!

    June 13, 2012 at 10:28 pm | Reply
    • Andrew

      You'd still feel the Gs. Thank god you're not a pilot.

      June 13, 2012 at 10:34 pm | Reply
    • airhead

      I know what you mean, I get that way after a Harvey Wallbanger.

      June 13, 2012 at 10:36 pm | Reply
    • SPW

      Why do people on the internet feel to the need to make up their own conclusions when their expertise in the field is probably as much as watching an episode of Modern Marvels on the History channel about the subject.

      June 13, 2012 at 10:56 pm | Reply
      • Darren

        Great point! But... Aren't you coming up with your own conclusion about the experience levels of people in this comment section? 😀

        June 13, 2012 at 11:16 pm |
      • Colin

        Don't take the internet so seriously friend.

        June 13, 2012 at 11:19 pm |
      • Arm chair engineer

        Because it keeps you thinking and it's entertaining! :o)
        That's what makes us Americans. We are always stirring things around to get to the next level or figure things out.

        June 14, 2012 at 3:30 am |
    • Fred Evil

      Not an issue with oxygen pressure hoss, under G forces, your blood behaves as if it were much heavier as well as your arms/legs, meaning it drains to your feet, and your heart has a very hard time pumping it into your head, which then means less oxygen is carried to your brain by the substantially reduced flow of blood.
      G-Suits and their ilk usually squeeze your legs and/or arms like a balloon, so that the blood cannot pool there, and your heart has an easier time getting it to your brain.

      June 13, 2012 at 11:37 pm | Reply
  90. Ron

    Warp drive has a leak!!!

    June 13, 2012 at 10:23 pm | Reply
  91. Dust_It_Off_It_still_works

    Okie dokie, so this is one more arrow in the quiver for unmanned aerial vehicles, no?

    June 13, 2012 at 10:22 pm | Reply
    • airhead

      Don't give it away, they are testing arrows at area 51 as we talk.

      June 13, 2012 at 10:38 pm | Reply
  92. SkyKing

    How does that address the similar complaints of Raptor cough made by ground crews working on the aircraft?

    June 13, 2012 at 10:12 pm | Reply
    • GalaxySparkchaser

      Took the words right out of my mouth. I'm a prior maintainer, and we never got flight suits unless we were flying crew chiefs. Fighters don't have FCCs, so they'd never get flight suits.

      June 13, 2012 at 10:27 pm | Reply
    • airhead

      Its related to air pressure rebounding between the ferndock and simulet.

      June 13, 2012 at 10:34 pm | Reply
      • The Bear

        "airhead – Its related to air pressure rebounding between the ferndock and simulet."

        Can't be; the ferndocks were redesigned (at a cost of 40 million), and the simulets were all individually tested and replaced (for another 57 million). My bet is it's the carburetor belts slipping.

        June 14, 2012 at 2:14 am |
      • Arm chair engineer

        No it's the muffler bearings in conjunction with the flimminflanger valve.

        June 14, 2012 at 3:40 am |
    • Rich

      "How does that address the similar complaints of Raptor cough made by ground crews working on the aircraft?"

      From the article:

      "The Combat Edge problem does not explain why some mechanics have also suffered from hypoxia while working on the planes on the ground."

      So... it doesn't. But chasing this wild goose makes them feel like they're making progress. I mean, I suppose it *could* be multiple causes with the same symptoms – but even if they're right about the Combat Edge being the problem, it doesn't fully address the issue.

      June 13, 2012 at 11:01 pm | Reply
    • Dalton

      It doesn't address the ground crews. They're throwing darts at the wall. It can't be the hyper-expensive F-22, right? Because that would be too expensive to admit to.

      June 13, 2012 at 11:27 pm | Reply
    • cja

      Pure oxygen is very irritating to the lungs. Long exposure to ti is not good at all for you. Cause inflammation of the lungs. The air is about 21% oxygen or only about 1/5th is O2.

      June 13, 2012 at 11:54 pm | Reply
    • Herby Sagues

      Why does it have to be the same cause?
      Ground crews are exposed to the exterior materials. Pilots are not (and, given operational pressure at the cabin, air from the exterior can't get in once the plane is flying). So whatever the cause, it is most likely unrelated. Two separate design defects.

      June 14, 2012 at 12:45 am | Reply
  93. jack and gerry goddard

    We are thinking the same thing as joep199

    June 13, 2012 at 10:03 pm | Reply
  94. joep199

    Maybe we're exceeding the capacity of the human body to deal with this level of stress.

    June 13, 2012 at 9:47 pm | Reply
    • airhead

      Try living in my house for stress.

      June 13, 2012 at 10:35 pm | Reply
    • Arm chair engineer

      I have to agree. That's why I think that remote operated combat fighters are the way to go like another guy posted.
      Major increase in capability, smaller, and should have lower costs. Don't forget you still have to have a pilot on the ground and support systems to fly it.

      June 14, 2012 at 3:34 am | Reply
  95. mex

    made in china?

    June 13, 2012 at 9:25 pm | Reply
    • airhead

      if it was it would work

      June 13, 2012 at 10:35 pm | Reply
      • Jerry

        Yes, but only until the 1-year warranty ran out: next day, "POOF!"

        June 13, 2012 at 11:01 pm |
      • Jt_flyer

        You obviously earned your handle.

        June 13, 2012 at 11:24 pm |
    • Fred Evil

      You see an Apple logo on that thing...?

      June 13, 2012 at 11:39 pm | Reply
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