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History of a locomotive - SP SD7

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History of a locomotive - SP SD7

Unread postby MadMike1024 » Tue Apr 10, 2018 3:21 pm

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EMD SD7 Build #15990 - The SD7 Demo/SP 5308/SP1518

History:
Southern Pacific Railroad's (SP) number 1518 is an EMD SD7 diesel locomotive. It was built originally in May 1951 as General Motors
Electro-Motive Division's (EMD) Demonstrator 990.
It was the first "SD" series locomotive ever built. Its road number 990 is in reference to its EMD Engineering Department Project Number: 15990.
It demonstrated on several roads before being sold to Southern Pacific on 10/10/52 and sent back to EMD for refurbishing and repainting
in SP's tiger stripe paint and renumbering as #5308.

It was classified in one-unit class DF-116 as it was slightly different from all the other SD7s owned by Southern Pacific.
It entered service at Ogden, UT on 10/23/52 and was immediately sent to work on SP subsidiary Northwestern Pacific Railroad alongside SP's other SD7s.

As delivered, it had dual control stands, a winterization hatch over the forward fan and two single A-200 "blat" horns mounted on the roof of the long hood directly behind the cab.
SP added a steam generator inside the short hood and a large "beer barrel" or "trash can" Mars signal light above the headlight on the front of the short hood.
In the mid-1950s SP repainted it in the "black widow" paint scheme, then into the scarlet and grey scheme about 1959.
Since it still had dual control stands, the painted feathers were applied to both ends. It was the only SD7 to have feathers at both ends denoting two control stands for bi-directional operation.

In the early 1970s it was repainted without the rear feather, although it retained its dual control stands.
SP renumbered the locomotive to #2715 in 1965, then to #1415 in 1/74 when the EMD MP15AC deliveries approached the 27xx numbers.
Sometime during the late Sixites, the two A-200 horns were replaced by a Nathan P3 on the right side and a Nathan M5 on the left side.
Also at some point during the late Sixties, the large Mars signal light was replaced with an end mounted Pyle National sealed-beam Gyralight.

The locomotive was rebuilt at the Sacramento General Shops as an SD7R in 1980 and renumbered to #1518, and was released for service on 2/5/80.
In this rebuild, it lost its dual control stands, dual horns, cab end water tank, and winterization hatch.

It was the only SD7 to have a winterization hatch, a feature that was very rare on SP but not unknown - several SP F7 and the odd GP20 also had them.

Union Pacific Railroad took control of the SP in late 1996, and 1518 was retired on 5/5/97 and sent to the UP's roundhouse in Cheyenne, Wyoming, to be preserved.
Instead, Southern Pacific 1518 was donated in April 2003 to the Illinois Railway Museum where it currently resides in operable condition.

All of the liveries the locomotive wore are represented in this collection, as well as the hardware configurations. Some of the numbers aren't.
We've tried to make the models as accurate as possible, but we've left a few mistakes to keep the rivet counters happy. ;-)

The creators: Michael Stephen, Dan Vystrcil, Mike Durdan, and Micheal Calvin
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Re: History of a locomotive - SP SD7

Unread postby PNWR1854 » Tue Apr 10, 2018 4:51 pm

!!*ok*!! !!*ok*!! !!*ok*!!
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Re: History of a locomotive - SP SD7

Unread postby ET44C4 » Tue Apr 10, 2018 5:19 pm

I absolutely love this project. Thank you all for your contributions as well as for the information regarding these units.
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Re: History of a locomotive - SP SD7

Unread postby gtrtroger » Tue Apr 10, 2018 5:37 pm

This is a unique approach to a repaint ... and it works really well.
!!*ok*!! !!*ok*!!
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Re: History of a locomotive - SP SD7

Unread postby ZekTheKid » Tue Apr 10, 2018 5:42 pm

Outstanding repaints! Is this off of the SD7 on Golden Age of Railroading, or the DRGW one by DTG?
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Re: History of a locomotive - SP SD7

Unread postby MadMike1024 » Tue Apr 10, 2018 6:23 pm

ZekTheKid wrote:Outstanding repaints! Is this off of the SD7 on Golden Age of Railroading, or the DRGW one by DTG?


GreatNortherners Golden Age SD7, freeware, and all the iterations are complete and standalone.

One can set the time of an operation by selecting the correct paint scheme. Somewhere along the line, I'd like to find someone to model the drum/trash can orbital light.
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Re: History of a locomotive - SP SD7

Unread postby bpetit » Tue Apr 10, 2018 11:16 pm

Diggin that EMD Demo paint.
"If you really needed a diesel locomotive right away, then go ahead and order a ALCO. But if you could wait for real quality, then go for an EMD or a GE".


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Re: History of a locomotive - SP SD7

Unread postby imnew » Wed Apr 11, 2018 8:26 am

What a pack! Nice work !!*ok*!!
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Re: History of a locomotive - SP SD7

Unread postby MadMike1024 » Wed Apr 11, 2018 8:36 am

bpetit wrote:Diggin that EMD Demo paint.


I did the demo pair, 990 and 991. Those would have been seen all over the US from built to 1952 when SP bought them.

All packed and uploading now...
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Re: History of a locomotive - SP SD7

Unread postby jpetersjr » Sun Apr 15, 2018 10:12 pm

How about a screenshot for any route any era setting the demonstrator in 1952 to how it might have looked.
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Re: History of a locomotive - SP SD7

Unread postby MadMike1024 » Mon Apr 16, 2018 5:36 am

jpetersjr wrote:How about a screenshot for any route any era setting the demonstrator in 1952 to how it might have looked.


I did that a long time ago, I had them delivering the ex Army 55 tonner to RWA. I'll do something more current tho.
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Re: History of a locomotive - SP SD7

Unread postby jpetersjr » Sat Apr 21, 2018 7:45 pm

When you run the demo version of the engine you see the outside of the cab as the SP engine, when we'd like to see the red exterior from the inside.

Demo 991 also has a missing texture coming up with an error texture on the engine model.
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Re: History of a locomotive - SP SD7

Unread postby buzz456 » Sat Apr 21, 2018 9:27 pm

jpetersjr wrote:When you run the demo version of the engine you see the outside of the cab as the SP engine, when we'd like to see the red exterior from the inside.

Demo 991 also has a missing texture coming up with an error texture on the engine model.


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