On Wednesday, 4 June 2014 04:16:20 UTC+2, Clark F Morris  wrote:   
      
   > Because the E units have 6 axles, the individual axle load should be   
   > less and it would be interesting to compare centers of gravity.   
      
   The E series does not have a particularly light axle load, because although it   
   has 6 axles, it is a heavyweight machine.  An E9 has 2400 hp, weighs 140   
   tonnes and rides on 6 axles, giving an axle load of 23.3 tonnes.  An HST power   
   car (1970s design) has    
   2250 hp, weighs 70 tonnes and rides on 4 axles, giving an axle load of 17.5   
   tonnes.   
      
   The real question is why modern locomotives end up so heavy.  I expect part of   
   it is that FRA requirements lead to the need for a much heavier structure, and   
   part of it is that the customers don't bother specifying a lightweight   
   locmotive, so they get    
   what they ask for.   
      
   Robin   
      
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