Locomotives

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Last post 11-16-2009 10:44 PM by monon99. 20 replies.
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11-02-2009 3:17 PM In reply to
Offline BNSFwatcher
Not Ranked
Joined on 05-27-2009
Posts 290

Re: when to use 4 axles or 6

With the downturn in business, a lot of older EMD 4-axle units have been 'mothballed'.  Our Sweetgrass and Great Falls Div. branches, out of Shelby, MT (on the High Line) now sport a lot of Dash 9-44CW, etc., where the GP-38 once reigned.  These are not "132# gorilla" branches, but the loco count is down.  We even have some (Yuck!) SD-70Ms, etc., coming up on coal trains, heading west, much to the chagrin of the MRL.  The dedicated 'switchers' are history, being replaced by GP-38s.  This is DP territory, with locos being dropped off or added to the unit trains.  Wish we had a "Dedicated Hostler" who really knew how to set up DP units!  Guess "Mechanical", in Fort Worth does, too!!!

11-02-2009 10:11 PM In reply to
Offline GP40-2
Not Ranked
Joined on 07-11-2004
Posts 494

Re: when to use 4 axles or 6

Just use 6 axle AC power on everything like CSX does. That way you never have to worry about outdated 4 or 6 axle DC locomotive issues. LOL.
11-03-2009 9:57 AM In reply to
Offline tree68
Top 25 Contributor
Joined on 12-25-2001
Northern New York
Posts 8,655

Re: when to use 4 axles or 6

GP40-2:
Just use 6 axle AC power on everything like CSX does. That way you never have to worry about outdated 4 or 6 axle DC locomotive issues. LOL.

That may be true on the mains, but there's still some '38's working on CSX. 
11-03-2009 1:51 PM In reply to
Offline joesap1
Not Ranked
Joined on 11-16-2003
Tulsa, OK
Posts 109

Re: when to use 4 axles or 6

On the railroad where I 'm employed we use 4 axle power on tracks which have worn rail and ties. Six axle power is much harder on rail and ties, especially on curves.

11-04-2009 10:23 AM In reply to
Offline CSSHEGEWISCH
Top 50 Contributor
Joined on 12-21-2001
Burbank IL (near Clearing)
Posts 5,197

Re: when to use 4 axles or 6

joesap1:

On the railroad where I 'm employed we use 4 axle power on tracks which have worn rail and ties. Six axle power is much harder on rail and ties, especially on curves.

Sounds like what happened on D&RGW's Monarch branch.  It was standard-gauged in the mid-1950's and the original plan was to use SD7's because of the grades (up to 4%).  However, the long wheelbase caused derailments on some of the curves so GP9's became the standard power on the branch.

11-16-2009 10:44 PM In reply to
Offline monon99
Not Ranked
Joined on 12-30-2008
Posts 12

Re: when to use 4 axles or 6

 There's a rickety iron bridge in Indy that was too weak to haul fully loaded covered hoppers over,so they were partly unloaded and the excess trucked around,of course we had 4 axle locomotives which had greater loading per axle than those hoppers! We would pray before we crossed. Some clever railroads would put a spacer car between the engines and run long jumper cables across a flat car or through a coach to spread the weight out across the bridge. Of course proper bridge maintenance would solve this issue!

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