name this model (GE AC4400CW)

[frikentrainnerd]

Can anyone please tell my this engine model?
http://www.trains.com/mrr/objects/image ... 0x1200.jpg
I did some reserch and belive its a GP60 but want some 'profesional' advice.
Thanks in advance.

[scottychaos]

sorry, but not even close to a GP60!
wrong maker, (its clearly some flavor of modern GE, GP60 is an EMD)
wrong number of wheels (the model is 6-axle, GP60 is 4-axle)

its some kind of modern GE widecab, probably a dash-9 or ES series variant, something like that.
using the UP road number, 5835, and assuming thats an accurate number for the model (NOT a safe assumption!
lets see if we can find a real UP 5835 that matches..

here we go:
http://www.rrpicturearchives.net/locoPi ... x?id=84333

thats a GE AC44CWCTE (wow, that must be a UP model designation!)
(what is that model outside of UP?, probably a variation of the AC4400?)

model looks very close..model is probably a "stock" AC4400, although it might be tricked out with UP-specific details..

Scot

[scottychaos]

Ftn,
just to help with your diesel ID skills (no one is born knowing all this!

here is your Union Pacific GE AC44CWCTE:
http://upload.wikimedia.org/wikipedia/c ... P_5587.jpg
has the classic GE 6-axle widecab profile..common as dirt these days.
notice the GE 6-axle trucks, unique to GE, also the flared radiator grill at the back.

and a major spotting feature to tell a GE from an EMD..
EMD hood units nearly always have round fans on the roof, EMD SD60:
http://crcyc.railfan.net/locos/emd/sd60m/cr5505roof.jpg

GE diesels almost never do, GE Dash-9:
http://www.rayman4449.dynip.com/Dash_9_ ... _0021a.JPG

although the wide cabs can look a lot alike on both..

and this is an EMD GP60:
http://homepage.mac.com/davidhoge/upgp6 ... H36936.jpg

very different looking beastie..
4-axle trucks, the classic GP spartan cab, EMD roofline with visible fans (which GE's dont have)

although there were also widecab GP60's:
http://www.michael.net.nz/Files/Attachm ... C_9507.jpg

with a cab that looks similar to the GE..but still has the GP trucks and the classic EMD roofline, with the fans,
very different than a GE.

it takes awhile, but eventually you will notice these kinds of details in your sleep!

Scot

[westr]

It is a General Electric AC4400CW. The prototype locomotive was built in 2002 and Union Pacific calls it a C44AC-CTE, but that is UP's made-up designation for an AC4400 equipped with the "Controlled Tractive Effort" system that reduces tractive effort when used as a pusher for distributed power. (Similarly, UP calls their ES44ACs C45AC-CTEs) There is no external difference between an AC4400 with CTE and one without.

Before that group of AC4400s was delivered, UP had former SP GP60s in that number series including 5835, so that is probably where that came from. GP60 #5835 (formerly Southern Pacific #9736) received that number in 1998 and was renumbered to #2035 just 4 years later in 2002. (And just to make things even more confusing: from 1974 to 2001, the number 2035 was assigned to a GP38-2 that is now numbered 535.) Locomotive numbers aren't always permanent, so you have to be careful when using them for identification.

[frikentrainnerd]

So basicly its just an AC4400CW look-a-like.

[westr]

It's not a lookalike; it IS an AC4400CW. CTE is just an available option, as it were. General Electric didn't distinguish between the ones with CTE and the ones without; they are all AC4400CWs. UP came up with a different name for their own use because they have some with CTE and some without and operationally it makes a difference to them to easily know which ones have CTE.

[frikentrainnerd]

Ohh i get it now.
Thanks everyone!

[diburning]

It's not a lookalike; it IS an AC4400CW. CTE is just an available option, as it were. General Electric didn't distinguish between the ones with CTE and the ones without; they are all AC4400CWs. UP came up with a different name for their own use because they have some with CTE and some without and operationally it makes a difference to them to easily know which ones have CTE.

Actually, GE calls then AC4400CW-CTE. It's not an "official" designation for the fact that it is not on the builder's plate, but on GE documentation, that is what they are.

[westr]

GE calls then AC4400CW-CTE. It's not an "official" designation for the fact that it is not on the builder's plate, but on GE documentation, that is what they are.

What kind of GE documentation are you referring to? If the builder's plates on the ones with CTE just say "AC4400CW" it would seem that GE offically considers them just AC4400CWs.