EMD SD45 - Union Pacific

Re: EMD SD45 - Union Pacific

Postby Gus R » Fri Sep 22, 2023 2:17 pm

Thanks axeonalias. I do enjoy myself doing this. Sometimes it borders on an obsession while being a challenge to figure out the plans without spending weeks on one part.

I'm still amazed at the weight of these locomotives. The SD-45 weighs 368,000 pounds.
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Re: EMD SD45 - Union Pacific

Postby Gus R » Sat Sep 23, 2023 12:46 am

A hand brake wheel and a sand filler cap. The wheel is comprised of 5 radial components except for the lug which is just a group. Sand is used for traction on railroad.

Hand-Brake-Scene-2.jpg
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Re: EMD SD45 - Union Pacific

Postby majid » Sun Sep 24, 2023 7:33 pm

This is crazy.... Wow!
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Re: EMD SD45 - Union Pacific

Postby Gus R » Sun Sep 24, 2023 8:26 pm

Thanks Majid. I managed to reduce that wheel from a 1.2 MB component to 146 KB. Laid it out at first in Autocad which imports with 100 segment circles. The Former component was made up of 5 identical components. With fewer segments and making it out of 10 identical components I cut it down to size.
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Re: EMD SD45 - Union Pacific

Postby Bryan K » Sun Oct 01, 2023 3:34 am

:thumb: :thumb: :thumb:
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Re: EMD SD45 - Union Pacific

Postby Gus R » Wed Oct 04, 2023 12:52 am

I've been working on the railroad!

So, back to the SD45. I haven't nailed down the exact horn used by this number and at first I thought it might be the Nathan Chimes P3 but I think it might be a Prime Manufacturing 920. It can also be a Leslie. I started off with the P3 so I thought I'd soldier through it and possibly beyond what's needed for an overall locomotive model. No plans were available so I had to eyeball it with images of the P3 which required a deep search on the internet.

The mounting bracket was a little complicated.

Nathan-P3-A.jpg


Nathan-P3-B.jpg
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Last edited by Gus R on Thu Oct 05, 2023 2:18 am, edited 1 time in total.
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Re: EMD SD45 - Union Pacific

Postby Bryan K » Wed Oct 04, 2023 4:07 pm

Wow! :thumb:
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Re: EMD SD45 - Union Pacific

Postby Gus R » Wed Oct 04, 2023 6:02 pm

Thanks Bryan. It looks more like a polished trumpet right now but that's the fun of rendering. The material is Brushed Brass Metal Texture from Poliigon. I added the scratches in a material layer which if from 4K Imperfections.

I had some of the parts pointing in the wrong direction and fixed that since. It's too detailed to include in the final SD45 model or maybe not since I can always create a Thea proxy. I did the line work for the Nathan logos in Autocad. It wasn't that difficult since it's all straight lines. I'm able to reduce the amount of linework in SU by using Thea's bevel.

Now I'm thinking about modeling a trumpet.

Horns-2-Higher-Res-Scene-7.jpg
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Re: EMD SD45 - Union Pacific

Postby Gus R » Thu Oct 05, 2023 5:33 am

SD-45-06-Scene-26.jpg
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Re: EMD SD45 - Union Pacific

Postby Gus R » Thu Oct 05, 2023 5:27 pm

Here's the Prime Manufacturing 920. It's a copy of the Leslie S-3L. It was a lot easier to model than the Nathan P3. The material is "Cast Iron Texture, Raw" from Poliigon.

Prime-PM920-Scene-8.jpg


Prime-PM920-Scene-3.jpg


Prime-PM920-Scene-9.jpg
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Re: EMD SD45 - Union Pacific

Postby ntxdave » Thu Oct 05, 2023 6:09 pm

This stuff blows my mind. I need to set my level back to beginner. :o
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Re: EMD SD45 - Union Pacific

Postby Gus R » Fri Oct 06, 2023 12:00 am

Thanks Dave. Practice, practice, practice. I think in this particular case it helps to be able to visualize distances and think proportionally such as if something is 20 inches long you estimate other parts of an object which may have a diameter of 1 inch. Then if that looks wrong try 1.25 inches, etc. I know in the case of design it's also good to step away from the computer and think about how you'll tackle a project while lying in bed.
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Re: EMD SD45 - Union Pacific

Postby Gus R » Tue Oct 10, 2023 12:35 am

This is the shutter and grille assembly. The shutters control airflow for air cooling. They're normally open. The inner grille goes on all three on each side of the locomotive. Omitted for clarity.

SD-45-08-Scene-35.jpg


SD-45-08-Scene-36.jpg


SD-45-08-Scene-37.jpg
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Re: EMD SD45 - Union Pacific

Postby Bryan K » Tue Oct 10, 2023 4:49 am

Absolutely stunning detail!

One of my first jobs out of high school was as an old school mechanical drafter. Real paper and pencils. I was creating drawings right down to nuts and bolts and welds for very large heavy equipment. I really appreciate mechanical details.

I often skip them in my SU models to keep the file size manageable. SU 2017 does not like large file sizes.

Again, excellent work!
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