Steam (NW Mailing List)

[NW Mailing List]

Well, a DC motor will produce maximum tractive effort at stall, but  
how long before something burns out?  I'm impressed.

I wonder at what low speed point point that the savings in fuel,  
etc., cease to make up for the extended crew time and the tieing up  
of the RR.  With Diesel approaching $5 a gallon I guess that point is  
pretty slow.

pete groom
On May 29, 2008, at 8:01 PM, NW Mailing List wrote:


The modern 6-axle Diesel,  particularly, with AC drive, is the  
ultimate "drag" engine ever.
(I've heard that AC loco powered coal drags in Wyoming sometimes   
climb grades at three mph!)
pete groom


Well below that if rail conditions are good.  NS routinely uses two  
C40-9Ws (or as I call them Crap9s) to take 170-180 MTYs up C'burg  
hill... they'll slow to less than 2.5mph and still pull.

Robb Fisher
RFDI

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