I guess I missed out on the OP, and it's hard to follow now, but the
pix I see is normal. It is a 4400 HP, GE AC44CWCTE. It has some
extra-ordinary roof equipment, some of which is the standard dynamic
braking resistors, and some looks like extra cooling but I'm not sure.
Here's a series of pix of 5720 running:
That's ackshooly a good idear.
Altho they can also just put smaller (or more) locomotives in the consist,
and not drive any given diesel so hard, because most locomotives have the
provision where one locomotive can be made the "master" locomotive, and the
others in the consist are made "slaves" -- even tho each locomotive is
independently identical. So it's not necessary to have a slug as the slave.
So all locomotives in the consist are powered/revved up by the engineer's
controller in the head-out (pulling) locomotive. Which would include slugs
in the consist, as well.
And the master/slave status of any locomotive can be switched over as
necessary, usually between the two locomotives at either end of the consist.
So altho the slug is a nice and cheaper solution, it's not a necessary
solution, since the provision for distributed power is already built in to
each locomotive itself.
Again, traction can be as much of an issue as raw power itself. Altho, the
six-axle config of these high-hp locomotives certainly helps.
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