Sd60e

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brad_in_omaha

Active Member
SD60E


Until I saw the NS Veterans Locomotive today, I never heard of an SD60E Apparently its what NS is calling a Standard SD60 that they rebuild to their own specs with their own cab. Apparently they are going to do several hundred and also purchased additional used SD60 units to rebuild.

Here is the Veterans SD60E

7476.1352384163.jpg
 

westbnsf

Railfan Photographer
Is it a NS rebuild thing to have an overhang above the window? I don't think I have ever seen were the top of the cab extends beyond the windshield. Very nice paint job though!
 

deepcrk06

New Member
reading about the sd60e specs - Classified by NS as power group 5, 8 axles of power, 8 axles of extended range/high capacity dynamics

I was wonder how they get 8 axles of power on a 6 axle engine. Am I missing something?

Still like the looks of this locomotive.
 

papio

Active Member
reading about the sd60e specs - Classified by NS as power group 5, 8 axles of power, 8 axles of extended range/high capacity dynamics

I was wonder how they get 8 axles of power on a 6 axle engine. Am I missing something?

Still like the looks of this locomotive.
I emailed Chris Toth (He's an expert in this area) and he replied with the following:

"It is based on the tractive and braking effort produced by the locomotives. Hi-Adhesion and AC traction units count for more than the normal number of axles when figuring the maximum number of powered axles allowed in a particular consist. This prevents a train from being torn in two under power or from jack-knifing while in dynamic braking."
 

BNSFEng

Locomotive Engineer!!!
reading about the sd60e specs - Classified by NS as power group 5, 8 axles of power, 8 axles of extended range/high capacity dynamics.

I was wonder how they get 8 axles of power on a 6 axle engine. Am I missing something.
Still like the looks of this locomotive.
On BNSF we have limitations for number of powered axles and number of dynamic brake axles. The newest engines have much better adhesion % than older engines so more force is generated per axle and must be limited to minimize track damage or pull apart of the train. So by upping the number of axles on these units you stay in limits.

280,000 pounds of retarding force is the maximum our track can handle. Older locomotives put out 10,000 pounds of retarding force per axle. So our maximum dynamic axle limit per consist is 28. Newer locomotives have about 14,000 pounds of retarding force per axle, so a Dash 9 or equivalent locos is 84,000 pounds and then 3 X 8 axles = 252,000 pounds we round down to 24 axles so only 3 engines can have their dynamics cut in on the lead consist. Certain trains can use up to 32 axles of dynamics if they meet certain requirements.

Powered axles have a higher limit so 40 is the limit for most trains with some up to 48.
 

deepcrk06

New Member
Thanks for the information. I always wondered how a unit was rated with more axles then they had, now I know. Appreciate the info.
 




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