From: ulickmagee@feckoff.invalid   
      
   On 27/03/2020 01:53, towbar wrote:   
   >   
   > When you've been around cockpits long enough (retired for 12 years now)   
   > you know how a crew functions, that not everything is always said, that   
   > there are fingers pointing and grunts or ahumms coughed up instead.   
   > Having once digested the origial french transcript I figured they had   
   > (over)heating wheels before clearance onto the runway. That couldn't   
   > have helped, could even have made the debris 'unnecessary' so to speak.   
   > I know what a piece of tire can do but didn't think how a full tank   
   > could/would behave. I should have because I once accidentally hit a   
   > small but very full diesel tank with a metal bar and a mechanical   
   > thermometer inside it just fell off its mounts which broke, surprisingly   
   > because it had been very well fixed. Due to fluid dynamics I'm not sure   
   > if the tanks would really have needed to be more full than almost full   
   > for something like what you describe to happen.   
      
   I understand the aircraft had been parked for some hours before takeoff,   
   how did the brakes/wheels overheat?   
      
   Something that should be borne in mind is Concorde's high V1/Vr speeds   
   compared to other jet aircraft. This greatly increases the momentum of   
   any tyre fragments ejected while at or above V1. Also the thing was   
   basically a flying fuel tank with 100 pax along for the ride... if it   
   had been produced in large numbers and flown at high utilisation, we   
   would certainly have seen other serious incidents. There were some close   
   calls before.   
   https://en.wikipedia.org/wiki/Air_France_Flight_4590#Previous_tyre_incidents   
      
   Still, an amazing technological achievement.   
      
      
   U   
      
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