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| "Tank car going over the retarder at the south hump at an Illinois Central Railroad yard," Chicago, Illinois, Nov. 1942, Jack Delano photo, FSA-OWI Collection, Library of Congress, Call Number: LC-USW3- 010536-D |
Collectively, American Car & Foundry (AC&F) and General American Transportation produced the vast majority of tank cars that traveled the rails in the Steam and Transition Eras. AC&F settled on common design traits that were modified to suit various sizes and types of tanks. The notable feature was the underframe and AC&F designated various underframes as "standard" and applied a "type" based upon the first year it was produced (more likely marketed, as some slightly predated the year's designation.) One of the most common was the Type 27. Of the Type 27 tank cars produced, most were 8,000 or 10,000 gallon general service cars (ICC 103) and insulated (ICC 104) or insulated and pressurized (ICC 105) most commonly in ~6,000 or 10,500/11,000 gallon capacities. However, there were small quantities of cars built in smaller or larger capacities or even multiple compartments (what modelers colloquially refer to a "two-dome" or "three-dome," for example.)
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| R C Feld photo, John C LaRue, Jr Collection |
As promised at the clinic, here is the file from my presentation about etchings. Note that it does contain some new and updated material from previous iterations. I plan to share an hourlong presentation sometime in the next couple months on a Wednesday evening as part of the Hindsight series (details to follow; to be the first to know, join the Hindsight 20/20 groups.io list.) It will cover the actual process of creating the artwork in far greater detail than I was able to present at Naperville.
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| Note the Murphy-type corrugated steel ends. Ralston Steel Car Co. photo, from Columbus Railroads web site (although I cannot find the exact citation at present) |
One of the most visually distinctive cars of the Steam and Transition Eras was the GS (General Service) gondola with drop doors and appliances to allow the doors to be locked or deployed to release the cargo. These cars are generally associated with Western roads, although there were small quantities on roads like the Boston & Maine, Maine Central, and New Haven (note that I am not including the more traditional-looking gons of the N&W, C&O, etc., with full length straight side sills and more simple drop doors, usually four in total, as they are quite different in appearance and operation.)
| The SP gons used a flat end with two braces. Ralston Steel Car Co. photo, from Columbus Railroads web site (although I cannot find the exact citation at present) |
Even more distinctive-looking were the "Enterprise" gondolas of the Union Pacific and Southern Pacific. They incorporated small sloped sections at the bottom of the interior of the sides, that made them look "short" compared to other gons. Besides the small sloped section of the sides, the distinguishing feature, and what made these "Enterprise" gondolas, was the mechanism that allowed the doors to be lowered. It consisted of "links" that when the rod on which they were threaded was turned, they "unfolded" until the doors were lowered and the links, fully extended, held the doors in an open position. In reverse, the links efficiently folded up. It was an ingenious design. The photo of SP 46954, from class G-50-9, illustrates how the links appeared when the doors were in the dropped and open position.
The cars were rated at a respectable cubic capacity of 1776 cu. ft. with an inside length of 41 ft. 6 in. (for comparison, the SP's steel and composite GS gons built in the 40s had listed cubic capacities between 1776 and 1948 cu. ft.) The accompanying table lists the information for both roads' cars. They represented significant groups of cars for both, especially the SP, where they were a signature car from the 20s into the 50s. The SP/PE cars were shuffled around a bit and were then renumbered entirely in 1956 as part of the systemwide renumbering. The accompanying table traces those changes.
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| The three cars shown in this photo are all UP G-50-7s and clearly illustrate the Murphy-style corrugated ends. "Council Bluffs Iowa Railroad Strike,"Feb 6, 1951, Robert Paskach photo, Robert Paskach Collection, The Durham Museum |
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| Many of the SP cars from classes -9 and -10 had the lower side sections and slope sheets replaced by welding new steel in place, as illustrated in this photo of G-50-10, with its palindromic number 361163 (some cars also included a relatively small number of rivets, as well.) This was because the side and slope sheet sections were a single piece. On the G-50-11 and G-50-12 classes the side sheets and slope sheets were separate sections, with the top of the slope sections overlapping the bottom of the side sheets, creating an "edge" inside the carbody where the two met, Bob's Photo |
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| SP 92622, a G-50-11, shows the separate side sheets, riveted along the bottom edge of the side sheet sections. Given that the side and slope sheets were distinct parts, repairs presumably involved only the component requiring maintenance as opposed to the entire side and slope sheet section, unless both required work, of course. Indio, California, Mar 11, 1956, Col. Chet McCoid photo, Bob's Photo |
