From: lfsheldon@gmail.com   
      
   On 5/8/2014 10:57 PM, Glen Labah wrote:   
   > In article ,   
   >   Larry Sheldon  wrote:   
   >   
   >> On 5/7/2014 9:15 PM, Glen Labah wrote:   
   >>> In article <536a764e$0$44781$862e30e2@ngroups.net>,   
   >>>    John Albert  wrote:   
   >>>   
   >>>> Even if 20-25 cars had leaked off in an hour's time, I will   
   >>>> guess that there would still have remained enough brake   
   >>>> cylinder pressure in the remaining cars to hold the train   
   >>>> from moving.   
   >>>   
   >>>   
   >>> Air turbine powered FRED?   
   >>>   
   >>> I've heard them running at the end of some of the BNSF trains.  I'm not   
   >>> sure a local railroad like the MMA would use something that expensive.   
   >>   
   >> I've never heard of such a thing (not that that means anything( but I   
   >> don't see how anything connected to the brake pipe (except maybe a   
   >> length of chain to a deadman) could help.   
   >   
   >   
   > Air turbine powered FREDs won't help.  Instead, my thought is quite the   
   > opposite. They cause a constant drain on the air line to run the turbine   
   > and might lead to a much faster drop in brake system pressure if the   
   > crew isn't used to having one.   
   >   
   > They are available from several manufacturers:   
   >   
   > http://www.wabtec.com/main/product.asp?product_id=52   
   >   
   > Unless you have a source of compressed air, the FRED / EOT / whatever   
   > will drain the air from the line over time.   
   >   
      
   Ahh the air from the pipe drives the turbine!  Of course.  (I've been   
   reading the greenie bullshit to much--I was picturing some kind of a   
   windmill in the slipstream!)   
      
      
   --   
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   h/t Dagelijkse Standaard   
      
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