Old 01-17-2010, 01:36 PM   #1
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Default CSX "GEVO" Question!

Okay, this one is for all the motive power junkies on here! I saw a CSX GEVO that was stenciled, "ES44AH". What does the "AH" mean?! I have not seen this before and I really am curious, thanks!
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Old 01-17-2010, 02:01 PM   #2
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AC->AH means heavy, see the post most of the way down on:

http://www.railroad.net/forums/viewt...=44715&start=0
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Old 01-17-2010, 02:16 PM   #3
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AC->AH means heavy, see the post most of the way down on:

http://www.railroad.net/forums/viewt...=44715&start=0
Thanks Janusz!! Damn kids and their new terminology these days! Lol!
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Old 01-17-2010, 05:29 PM   #4
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Kevin,

It seems that some of the new GEVO's (#700 through #949) are still ES44AC's while others are ES44AH's. The AH's rarely leave coal service here in the valley and in the Kentucky coalfields. They're used for shoving trains over the hill, etc. and regular coal train service in general.

The AC's on the other end, are still quite common here in the coalfields, but seem to gravitate elsewhere.

Hope this helps,
Chase
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Old 01-17-2010, 06:14 PM   #5
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Thanks Janusz!! Damn kids and their new terminology these days! Lol!
RF, aren't you a Gen Xr? Maybe even a later Gen Xr?
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Old 01-17-2010, 10:05 PM   #6
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Kevin,

It seems that some of the new GEVO's (#700 through #949) are still ES44AC's while others are ES44AH's. The AH's rarely leave coal service here in the valley and in the Kentucky coalfields. They're used for shoving trains over the hill, etc. and regular coal train service in general.

The AC's on the other end, are still quite common here in the coalfields, but seem to gravitate elsewhere.

Hope this helps,
Chase
That would make sense. The unit in question was on a coal train, thanks.
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Old 01-17-2010, 10:09 PM   #7
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RF, aren't you a Gen Xr? Maybe even a later Gen Xr?
Lol! I guess that it depends how you look at it. When I was growing up, most of my friends had the Atari, Nintendo, Sega games and the like. However, I did not simply b/c I would have had to buy it myself! Shortly before Christmas my wife bought a Nintendo Wii console for us. I'm still trying to figure out some of the options and bells and whistles. Hell, a good friend of mine has a 7yr old son, he can fix anything electronics related, we just sit there in amazement as he does his thing!
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Old 01-18-2010, 02:30 AM   #8
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Kevin,

It seems that some of the new GEVO's (#700 through #949) are still ES44AC's while others are ES44AH's. The AH's rarely leave coal service here in the valley and in the Kentucky coalfields. They're used for shoving trains over the hill, etc. and regular coal train service in general.

The AC's on the other end, are still quite common here in the coalfields, but seem to gravitate elsewhere.

Hope this helps,
Chase
I beg to differ. In only the past few months, I have seen MANY (not just a few) of these AH units on CSX's Rochester Sub hauling intermodal, freight, even grain!
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Old 01-18-2010, 09:12 PM   #9
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I beg to differ. In only the past few months, I have seen MANY (not just a few) of these AH units on CSX's Rochester Sub hauling intermodal, freight, even grain!
Probably fresh out of the factory before finding their way south.
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Old 01-19-2010, 03:49 AM   #10
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I beg to differ. In only the past few months, I have seen MANY (not just a few) of these AH units on CSX's Rochester Sub hauling intermodal, freight, even grain!
The ES40DC's (recently derated from 44DC's) are most common up there, but as previously stated, the AH's primary territory is right here in the coalfields. They do best over the massive grades with heavy trains, so I find it hardly accurate that "MANY" of them are up there, as the terrain up there is not as rough as down here.

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Old 01-19-2010, 05:02 AM   #11
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I saw a ES44AH in Middle TN while I was there. It was one of two lead units on your standard intermodal train.

Edit: After a second look, it was a CW44AH.
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Old 01-19-2010, 06:50 AM   #12
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Kevin,

It seems that some of the new GEVO's (#700 through #949) are still ES44AC's while others are ES44AH's. The AH's rarely leave coal service here in the valley and in the Kentucky coalfields. They're used for shoving trains over the hill, etc. and regular coal train service in general.

The AC's on the other end, are still quite common here in the coalfields, but seem to gravitate elsewhere.

Hope this helps,
Chase

Thats incorrect. On CSX, the ES44AC and ES44AH are exactly the same locomotive, the only difference is the decal giving the designation and that itself was a mistake. CSX #700-949 are all GE ES44AC's and early units were originally classed as ES44AC, which was a mistake as they were to be classed ES44AH. Many of the units also lacked the lightning bolt under the road number. Slowly the units have been reclassed as ES44AH and have had the lightning bolt decals applied. All of these units are ballasted to 432,000lbs and equiped with GE high tractive effort software. These units are assigned primarly to coal service, particularly due to the fact that these are the only CSX units equiped for Distributed Power service. However, they can be found virtually ANYWHERE on the CSX system in any type of service.

While there is no difference between a CSX ES44AC and ES44AH, there IS a difference between the CSX CW44AC and CW44AH (CSX designations for the AC4400CW). Units with the AH designation, CSX #273, #403, #459, #495-599 and 5101-5122, are ballasted to 432,000lbs and equiped with GE's high tractive effort software. These are CSX's High Tractive Effort units these units are capable of producing up to 36,000lbs of tractive effort per axle under certain conditions. (this also applies for the CSX ES44AC's and ES44AH's). The CSX CW44AC's are "stock" AC4400CW's (except for steerable trucks on some) which are capable of only 30,000lbs tractive effort per axle.

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Old 01-19-2010, 06:54 AM   #13
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Also, "AH" designates High Tractive Effort on CSX, not "heavy". Numerous other units fall under the "heavy" category on CSX including the SD70MAC's, SD70ACe's, SD80MAC's ES40/44DC's and AC6000CW's. These units do not meet the High Tractive Effort specifications and are not considered "AH" type units.

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Last edited by Bryan Jones; 01-19-2010 at 06:56 AM. Reason: additional details added
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Old 01-19-2010, 01:43 PM   #14
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Thanks for all the detail, Bryan.
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Old 01-21-2010, 12:36 AM   #15
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Probably fresh out of the factory before finding their way south.
I hate to be a PIA here, put get real! The last ones were made sometime around late 2008. I saw saw a total of five on a railfanning trip 3 days ago.
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Old 01-21-2010, 01:16 AM   #16
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The ES40DC's (recently derated from 44DC's) are most common up there, but as previously stated, the AH's primary territory is right here in the coalfields. They do best over the massive grades with heavy trains, so I find it hardly accurate that "MANY" of them are up there, as the terrain up there is not as rough as down here.

Chase
I agree that they shouldbe down there, but they seem to be meandering up here. Many I have also seen on many trains running back and forth. Such units are 941, 921, 867 and 948 have all been seen lately on at least two trains in the area.
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Old 01-21-2010, 02:10 AM   #17
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I agree that they shouldbe down there, but they seem to be meandering up here. Many I have also seen on many trains running back and forth. Such units are 941, 921, 867 and 948 have all been seen lately on at least two trains in the area.
Tell them to get back south! I like those high numberboard GEVO's more so than the low numberboard units on the 700-840 series ES44AC's and the ES40DC's.

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Old 01-21-2010, 11:08 PM   #18
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I don't mind them, but I sure as heck don't like them! The coolest thing in CSX's modern stable is the AH4400CW. Listening to one of those hauling a 600+ axle freight up South Byron Hill in Run 8 is about as good as CSX gets. They definitely sound different than the run-o-da-mill AC4400s too.
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Old 01-21-2010, 11:26 PM   #19
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I don't mind them, but I sure as heck don't like them! The coolest thing in CSX's modern stable is the AH4400CW. Listening to one of those hauling a 600+ axle freight up South Byron Hill in Run 8 is about as good as CSX gets. They definitely sound different than the run-o-da-mill AC4400s too.
Pft, a CW44AH?! C'mon, a SD70MAC pulling 150 loaded hoppers up a mountain beats any GE!

Even in some cases, you could even classify a CSX SD40-2 as "modern stable" and that would obviously beat the 70MAC simply due to the classy EMD 645 engine sound.

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Old 01-22-2010, 12:27 AM   #20
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Pft, a CW44AH?! C'mon, a SD70MAC pulling 150 loaded hoppers up a mountain beats any GE!

Even in some cases, you could even classify a CSX SD40-2 as "modern stable" and that would obviously beat the 70MAC simply due to the classy EMD 645 engine sound.

Chase
I'm not even going to comment....... Two teens hashing it out over the best motive power....

P.S. I'm just busting your stones!

P.P.S. What makes me cringe is when I see AC units leading DC units in very low speed uphill drags.

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Old 01-22-2010, 12:38 AM   #21
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P.P.S. What makes me cringe is when I see AC units leading DC units in very low speed uphill drags.
6mph at full amperage is great for DC motors right?

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Old 01-22-2010, 05:10 AM   #22
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Depends on how long they're in the red zone for...
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Old 01-22-2010, 07:22 PM   #23
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6mph at full amperage is great for DC motors right?

Loyd L.
NOPE, that is where AC wins, you can be doing 1 MPH up a steep grade with a 15,000 ton coal train and you'll never burn the traction motors out, AC is good for heavy haul freight service, DC on the other hand is well suited for high speed intermodal and manifest service and low speed yard/hump service.
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Old 01-23-2010, 01:15 AM   #24
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NOPE, that is where AC wins, you can be doing 1 MPH up a steep grade with a 15,000 ton coal train and you'll never burn the traction motors out, AC is good for heavy haul freight service, DC on the other hand is well suited for high speed intermodal and manifest service and low speed yard/hump service.
I would like to believe that Lloyd was being sarcastic Mike..
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Old 01-23-2010, 01:16 AM   #25
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Depends on how long they're in the red zone for...
VERY many answers to this one.
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