Enterprise Gondolas

 

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.

Road	Series Begin	Series End	Qty	Built	Builder	Class
UP	62000	62999	1000	1920	RSC	G-50-7
UP	63000	63999	1000	1920	PC&M	G-50-7
AE	4000	4025	26	1923	GATC	G-50-9
PE	5700	5899	200	1923	GATC	G-50-9
PE	5900	5999	100	1923	GATC	G-50-9
PE	6000	6099	100	1923	RSC	G-50-9
SP	46155	46604	450	1923	GATC	G-50-9
SP	46605	47079	475	1923	RSC	G-50-9
PE	20000	20599	600	1924	GATC	G-50-9
SP	91400	92399	1000	1925	TCI&RR	G-50-10
SP	92400	92899	500	1926	PSC	G-50-11
SP	92900	93899	1000	1927	SSC	G-50-12

GATC - General American Transportation

PC&M - Pullman Car & Manufacturing

PSC - Pressed Steel Car

RSC - Ralston Steel Car

SSC - Standard Steel Car

TCI&RR - Tennessee Coal, Iron and Railroad

UP diagram states series 63000-63999 built 1920, but photo evidence indicates majority of cars built in 1921

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.

Reporting	Series Start	Series End	Built	Qty.	Class	1956 Series	Notes
SP	14112	14442	1924	331	G-50-9	360002-360304	1
SP	44160	44359	1923-4	200	G-50-9	360305-360457	2
SP	44361	44428	1923	69	G-50-9	360458-360511	3
SP	46155	46604	1923	450	G-50-9	360512-360789
SP	46605	47079	1923	475	G-50-9	360790-361054
SP	91301	91325	1923	25	G-50-9	361055-361068	4
T&NO	42250	42449	1923-4	200	G-50-9	---	5
SP	91400	92399	1925	1000	G-50-10	361098-361993
SP	92400	92899	1926	500	G-50-11	361994-362376
SP	92900	93899	1927	1000	G-50-12	362377-363024

1 - transferred from PE 20000-series in 1951

2 - transferred from PE 5900- [100 cars], 6000- [16] and 20000-series [84]

3 - transferred from PE 6000-series

4 - ex-Arizona Eastern; transferred to SP in 1924

5 - transferred from PE 20000-series in 1929 [100 cars]; Dec 1940 from PE 6000-series [15] and 20000-series [85]

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

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

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