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The Boeing Company Message Board

  • donwshuper50 donwshuper50 Feb 22, 2013 9:40 PM Flag

    The BA BATTERY flamethrower

    Coming to an airport near you
    Another source, who is also familiar with the 787 investigation but not authorized to speak publicly, said a key challenge for Boeing would be to redesign the battery box so that it could truly contain a fire if one occurred.

    Despite Boeing's statements about containment being the plan for a battery issue from the start, the blue box that held the current lithium-ion battery was clearly "not designed to contain a fire," said the source.

    Another person familiar with the engineering work said the new box would be made of stainless steel nearly half an inch thick. It would be capable of containing an explosion, and would have a tube to vent smoke and flame outside the jet.

    However, the source said engineers have raised questions about the safety of venting flames outside the plane, especially if it is on the ground and being fueled. The effect could be something like a flamethrower, this person said.

    From
    http://news.yahoo.com/boeing-787-battery-fix-proposal-faa-not-temporary-194512893--finance.html

    Ya can't make this up !!

    SortNewest  |  Oldest  |  Most Replied Expand all replies
    • search on rcgroups for a thread titled

      Experimental Ignition of a Large LiPo Pack in a Vented Ammo Box

      cannot post entire thread but this extract ( for a small LIpo model airplane battery ) shoud make everyone happy with the BA boom box

      A 4S3P 6000 mah LiPo pack was placed in a .50 cal. ammo box vented with a 3” steel flex pipe, and charged @ 15amps, with a 29-volt limit. The pack was triple-wrapped in fibreglass cloth, about 12 layers, altogether.

      The purpose was to test whether the apparatus would contain a large LiPo pack ignition and direct the effluent outside through the pipe.

      Details of the apparatus (window closure, pipe installation, etc.) are moot. The ignition blew the ammo box lid open and a three-foot diameter fireball erupted.
      ...Tj cooper has done considerable LiPo ignition testing and has expressed an interest in testing large packs in a sealed ammo can. I would advise against it, since even a generously vented can will not withstand the initial pressure buildup. In my test, that buildup occurred over a timespan I would estimate at about a half-second. There was no supplementary air introduced into the box during the pressure buildup.

    • What are those big round oval things that hang off the wings?

      • 2 Replies to freeveritas
      • they work by sucking in the air from in front- heating it- and pushing it out the back

        Just a more deluxe version of the new improved Boeing battery box

        Of course IF one uses a good nozzle and properly directs the hot air
        one of tow or three things happen

        1) a jet effect like the big tubes
        2) laminar flow reducing drag ( aka p-51 oil cooler ) and improving performance
        3) you know you are near a corner office in chicago !

    • And look at this IF true - what do you think two such boxes will weigh ?

      Another person familiar with the engineering work said the new box would be made of stainless steel nearly half an inch thick. It would be capable of containing an explosion, and would have a tube to vent smoke and flame outside the jet.
      +++++

      So now we look up a definition of b o m b

      Instead of Boob on board - wde will have a b o m b on board

      And if it goes off on the tarmac ??

      Move on move on - nothing to see move on

 
BA
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