From: stephen@sprunk.org   
      
   On 12-Feb-16 03:47, rcp27g@gmail.com wrote:   
   > On Friday, 12 February 2016 06:49:39 UTC+1, Stephen Sprunk  wrote:   
   >> On 11-Feb-16 09:21, rcp27g@gmail.com wrote:   
   >>> As I pointed out elsewhere in the thread, DB (German railways)   
   >>> operate significantly higher power trains (200 mph ICE3 units)   
   >>> under 15 kV 16.7 Hz catenery.   
   >>   
   >> Nope.  Acela loses to ICE3 on every metric _except_ raw power:   
   >>   
   >> 		Acela		ICE3   
   >> Power	9,200 kW	8,000 kW   
   >> Weight	565t		409t   
   >> Power/Weight	16.2 kW/t	19.6 kW/t   
   >> Seats	304		403   
   >> Power/Seat	30.3 kW/seat	19.9 kW/seat   
   >> Top Speed	266 km/h	320 km/h   
   >   
   > The Acela figures are for a set, which has two power cars with two   
   > parallel power trains.  The ICE3 figures are for a single unit with   
   > a single power train, but the ICE3s commonly run in pairs, so the   
   > numbers for a whole train of 2xICE3 will be 16 MW, 806 seats, 818 t.   
      
   Comparing a double train with 806 seats to a single train with 304 seats   
   is blatantly unfair.   
      
   But yes, 16,000 kW @ 15kV is ~44% more current than 9,200 kW @ 12.5kV,   
   assuming both are near unity.  They're also ~20% faster--probably more   
   in practice since Acela averages about half of its top speed.   
      
   S   
      
   --   
   Stephen Sprunk         "God does not play dice."  --Albert Einstein   
   CCIE #3723         "God is an inveterate gambler, and He throws the   
   K5SSS        dice at every possible opportunity." --Stephen Hawking   
      
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