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AC Ownership

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Posted by Anonymous on Sunday, January 8, 2012 4:29 PM

This is valuable information, but it really belongs under locomotives.  The webmaster should move it.

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Posted by oltmannd on Tuesday, January 3, 2012 9:59 AM

They are not AC propulsion.  The AC stands for AC main generator, the output of which is rectified and fed directly to DC traction motors. Slip rings and diodes replaced the commutator on the old DC main generators. Everything downstream remained the same.

AC propulsion has an AC main generator whose output is rectified to DC, but then chopped back to AC to feed AC traction motors.

Control of the DC machines is done by varying the field on the main generator.  Control on the AC machines is done by varying the frequency to the traction motors.

-Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/

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Posted by BNSFandSP on Monday, January 2, 2012 11:28 AM

Might I ask where are the MP15ACs, GP15ACs, GP38ACs, and SD38ACs?

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Posted by oltmannd on Friday, June 15, 2007 1:00 PM
Wow!  Nicely done summary!

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Posted by nanaimo73 on Saturday, July 8, 2006 8:58 PM
Allright. Now I can fini***his.
Dale
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Posted by beaulieu on Saturday, July 8, 2006 2:22 PM
QUOTE: Originally posted by nanaimo73

Thanks John.
I've got that fixed, oops.

Are all of the CSX AC6000CW's (600s and 5000s) powered by HDL's ?


All were built that way, CSXT 699 blew up its diesel during the time that GE was having big problems with bearings on the HDL diesel, and so it received a temporary replacement FDL16 engine. That was about 5 years ago, the temporary engine is still in it, otherwise they all have the HDL engine.
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Posted by nanaimo73 on Friday, July 7, 2006 9:59 AM
Thanks John.
I've got that fixed, oops.

Are all of the CSX AC6000CW's (600s and 5000s) powered by HDL's ?
Dale
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Posted by beaulieu on Friday, July 7, 2006 9:37 AM
Dale, the first SD90MAC-H on the UP ended as number 8500 and was transfered to EMD Leasing as EMLX 8500 not as EMLX 8200, here is a photo link in its new guise on KCS
http://www.railpictures.net/viewphoto.php?id=144083
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Posted by CSSHEGEWISCH on Thursday, July 6, 2006 2:27 PM
QUOTE: Originally posted by nanaimo73

So KCS is going to repatriate them into the USA, and they would have to pay duties on them ?

Even before NAFTA, there would be no duties on these locomotives since they would be considered US-made goods returned.
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Posted by nanaimo73 on Monday, July 3, 2006 7:51 AM
QUOTE: Originally posted by beaulieu

UP's AC6000CWs with the 4400hp FDL16 engine are numbered in the 7300 series, the AC6000CWs with the 6000hp HDL16 engine are numbered in the 7500 series.


That's easy to understand. Thanks.
Now I just have to finish it in 10 days before the apocalypse.
Dale
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Posted by beaulieu on Saturday, July 1, 2006 3:09 PM
QUOTE: Originally posted by nanaimo73

Thanks John.
I think I'm just going to avoid that mess and just put in links to the UtahRails site. He has done an outstanding job with that.
I'm having enough problems with AC6000CW's, trying to find out how many there are of each type (4400 hp vs 6000), and I'm not even sure what to call the 4400 hp ones.


Yes Don has done an excellent job on that website. UP's AC6000CWs with the 4400hp FDL16 engine are numbered in the 7300 series, the AC6000CWs with the 6000hp HDL16 engine are numbered in the 7500 series.
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Posted by nanaimo73 on Saturday, July 1, 2006 11:37 AM
Thanks John.
I think I'm just going to avoid that mess and just put in links to the UtahRails site. He has done an outstanding job with that.
I'm having enough problems with AC6000CW's, trying to find out how many there are of each type (4400 hp vs 6000), and I'm not even sure what to call the 4400 hp ones.
Dale
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Posted by beaulieu on Friday, June 30, 2006 9:58 PM
Dale, minor error on your UP/EMD leasing SD90-H units
The first unit was built as UP 8160 which was renumbered as UP 8200 when more of the 4300hp units were delivered, then renumbered again as UP 8500. It is now running around as EMD leasing 8500. Further to this if you want the nitty gritty of their all-time numbers, UP 8161 became UP 8201, then UP 8501.
UP 8202 - 8205 became UP 8502 - 8505. All the other SD90MAC-Hs were delivered with the 8500 series numbers.
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Posted by beaulieu on Friday, June 30, 2006 11:45 AM
QUOTE: Originally posted by nanaimo73

OK.
I thought that was why CP had 137 AC4400CW's (8500-8655) registered as Soo Line locomotives.


Those locomotives are Soo Line engines, so that they can appear on the Soo Line tax return at the end of the year as expenses, otherwise CP would have to pay a lot more US taxes.
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Posted by nanaimo73 on Friday, June 30, 2006 9:25 AM
OK.
I thought that was why CP had 137 AC4400CW's (8500-8655) registered as Soo Line locomotives.
Dale
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Posted by beaulieu on Thursday, June 29, 2006 11:08 PM
QUOTE: Originally posted by nanaimo73

So KCS is going to repatriate them into the USA, and they would have to pay duties on them ?


I don't think there are any duties on locomotives, a large batch of BN and BNSF SD70MACs were built in Mexico as was more than half of the Union Pacific's SD70M fleet. The former TFM fleet is already in the US, right now quite a few are on BNSF paying back horsepower hours.
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Posted by nanaimo73 on Thursday, June 29, 2006 1:35 AM
So KCS is going to repatriate them into the USA, and they would have to pay duties on them ?
Dale
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Posted by beaulieu on Wednesday, June 28, 2006 8:49 PM
Here is a bit more on the former TFM SD70MACs. They were originally owned by a company named ElMoMex, Inc. Set up by either EMD or GM just for this lease.
KCS purchased the Locomotives in November 2005, and then did a sale and leaseback arrangement with better terms. The two wrecked units were TFM 1613 and TFM 1642, they were badly damaged in a runaway and derailment near Monterrey, Mexico in the summer of 2005. They were not written off until after they were purchased by KCS. It is expected that these locomotives will be renumbered, but KCS is not in a big hurry about their renumbering.
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Posted by nanaimo73 on Tuesday, June 27, 2006 10:27 AM
Thanks John. I had not heard any of that.
Will they be renumbered ?
Dale
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Posted by beaulieu on Monday, June 26, 2006 4:37 PM
Dale, another correction to your list the TFM SD70MACs were transfered to parent KCS and are not KCSM locomotives, two were wrecked as TFM and retired as such.
so only 73 will become KCS. They were originally leased from a special purpose GM leasing subsidiary. The deal was a little too expensive so KCS exercised its option to purchase the locomotives, then resold them to a different company and leased them back again. This time to parent KCS.
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Posted by SSW9389 on Tuesday, June 20, 2006 4:13 AM
And all this time I thought AC stood for Ahead Cab. [:D] Don't know about your question.

QUOTE: Originally posted by agentatascadero

Was SP the only railroad that rostered class AC in steam? That would be, of course, the Articulated Consolidation.
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Posted by agentatascadero on Monday, June 19, 2006 7:55 PM
Was SP the only railroad that rostered class AC in steam? That would be, of course, the Articulated Consolidation.
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Posted by nanaimo73 on Sunday, June 18, 2006 8:26 PM
Thanks again Ed.
I've inserted "under lease" twice to clarify things.
Dale
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Posted by SSW9389 on Sunday, June 18, 2006 7:55 PM
Dale check ownership of the SD60MACs. I've read they never left EMD ownership.
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Posted by SSW9389 on Sunday, June 18, 2006 7:54 PM
From Don Strack's Utah Rails site All Time UP Roster part 64.

"UP 7511 (1st) suffered fire damage on 7 June 1999; cause of fire was determined to be warranty-related; unit retired on 16 June 1999 and shipped to GE at Erie, Pa., on 17 June 1999; damage repaired and unit repainted to GE's red and gray scheme and renumbered to GECX 6002 in April 2000."
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Posted by SSW9389 on Sunday, June 18, 2006 7:44 PM
From The Diesel Shop 6002 AC6000CW 50945 bld date?? Test bed/Demo unit; Ex-UP 7511 (1st-my note) The UP 7511 (1) was replaced by GE with another unit.
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Posted by nanaimo73 on Sunday, June 18, 2006 9:24 AM
QUOTE: Originally posted by SSW9389

GE #6002 is a former UP locomotive IIRC. It was involved in some mishap on UP and returned to GE for a new unit. GE made it part of its lease fleet.


Thanks ED
I was wondering where that one came from.
I am glad to get it out of my way.
Dale
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Posted by SSW9389 on Saturday, June 17, 2006 4:55 AM
GE #6002 is a former UP locomotive IIRC. It was involved in some mishap on UP and returned to GE for a new unit. GE made it part of its lease fleet.
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Posted by nanaimo73 on Tuesday, June 13, 2006 1:36 AM
Eric
Thanks for the link. I'm still surprised that SP could get so many AC units with the shape they were in back then.
Dale

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