American F-35s grounded

Discussion in 'The Intelligence Cell' started by PepperSeaDog, Feb 23, 2013.

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  1. For sale two carriers with no catapult fitted
     
  2. Is this the third or fourth thread about this?
     
  3. Can't see why that would be the case. Turbine blades are relatively easy to change, all they need to do is decide if the cause was a manufacturing defect or a design defect.
     
  4. Exactly. An aircraft still being developed was found to have problem in a blade in the engine of ONE aircraft. How exactly is this headline news?
     
  5. This is the 3rd grounding from a crack in a blade in the 3rd stage lp turbine.
     


  6. Real worry? This engine is already at the limit and they want another 20% thrust out of it.
     
  7. Squadron Leader Steve Long's a bit of a cool cat isn't he!
     
  8. I'd hold off the panic button for now, sounds like they've confirmed a crack on one of the blades. Doesn't mean it is a fleet wide issue though. Until the disk has been stripped and all of the blades checked it doesn't mean much just yet. Could be FoD, highly unlikely since it's a LPT blade but stranger things have happened. More likely a production issue, single crystal blades are difficult and expensive to produce. They lose around 10% of a production run and it isn't beyond the bounds of reason that a blade has slipped through the inspection process.

    F-14, 16, 18, and Tornado all had similar issues. Not a drama yet, this is why have checks.
     
  9. Never had this problem with the Harrier did we?
     
  10. Not with the LPT, but plenty of reactive repairs required for fuselage cracking, back aft near the tail section.
     
  11. Wind ups aside, the little puffer plane went through engines at quite a high rate - the feck off big intakes give a clue.

    'In July 1992, problems in the F402 were said to be the single biggest reason for a 1986-1991 Harrier accident rate three times that of other Navy aircraft.'

    F402-RR