Why Replace These?
As mentioned in previous posts, I’m replacing the stock details on this Trinity covered hopper car. Along with other items the stock center sill is compromised and heavy in cross-section. It should present a straight line from end to end however, because of the built-in 3-rail concessions, this line is missing on the model. Since I’m replacing the bolsters and draft gear, I decided to correct this flaw and add other missing details. To strengthen my experience with metal work, I made the new center sill from quarter-inch square hollow brass tubing.

The full size car has a visible rod with support brackets that sits on top of the center sill. I don’t know what this does but since I can see it, I’m adding it to the model. This detail consists of lengths of 0.033” brass wire held by brackets made from 0.015” x 0.064” flat strip. I simply bent the flat strip around the wire and crimped it tight on the bottom. The tails of these brackets are trimmed and inserted into #65 holes I drilled near each end of the center sill sections. I soldered the wire and brackets in place using a spacer to ensure everything is level.

There should be a hole where this linkage goes through the discharge hoppers but there isn’t one on the model. I briefly considered trying to drill these but quickly came to my senses. Instead, I used the end profile of the sill to trim and file the linkage to the proper angle.

Welded to both sides of the center sill are two steel sheets that support the slope sheets of the hopper bays. I made these from 0.010” styrene for an improved scale thickness and appearance. The welded tabs are lengths of 0.010” x 0.020” styrene. Yes, these supports obscure the linkage I so carefully modeled, but it’s still visible where it needs to be, just as it is on the full size car.

The Tiny Work At Hand
I need 12 short lengths of 1/32” brass angle to serve as corner braces for the center sill where it passes through the discharge hoppers. My photos show a brace on both sides of the sill and since they are visible from normal view, I want to see them on the model.

I start with an oversized length of angle, which is rough cut and profiled on one end. To refine the profiles and get a consistent length, I made a jig of scrap styrene. This took less than five minutes and ensures a repeatable outcome. The jig holds the piece in place and provides a template for shaping the proper angle on each end.

After the pieces are shaped, I glue them in place with gel CA. While inspecting the work I noticed a few of the angles were out of alignment, either from placing them wrongly or my careless work in making them. This would annoy me in photos, so I carefully filed the protruding end back until it was even with its companion. Pieces of tape protect the adjacent areas from getting scratched by the file. The filing motion here is gentle and light to prevent breaking the bond of the CA and bending the part. It’s another working method I picked up from the videos.

The eye can detect tiny errors like this.

The masking tape protects the surrounding areas from getting scratched by the file.


People often question the sanity of adding detail that isn’t clearly visible. My response is that every detail, seen or not, is an opportunity to learn and grow as a modeler. In my view, that is reason enough to add them. It works for me but I acknowledge there are contrasting viewpoints.

I’m also tired of the unnecessary compromises modelers just accept without question. I’ve learned that we can build things much closer to scale without adversely affecting the operation of the model. With each detail added, the model comes closer to the image of the prototype and that’s the point of the whole exercise.