Blackwell, Enid & Southwestern / Gulf, Texas & Western / Kansas City, Clinton & Springfield / Kansas City, Fort Scott & Memphis / Kansas City, Memphis & Birmingham / Oklahoma City & Western / St Louis, Brownsville & Mexico / St Louis, Memphis & Southeastern / St Louis, San Francisco & New Orleans / St Louis-San Francisco 4-6-0 "Ten-wheeler" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 1100 (Locobase 8636)

Data from StL&SF 7 1908 Descriptions, SL&SF 1930, SL&SF 11-1943, and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Supplied as a batch of 10 (works #41455-41464) to the Frisco in November 1906 and 2 (42312-42313) to the Colorado Southern, New Orleans & Pacific Railroad in March 1907.

As delivered, these Ten-wheelers had 318 2" tubes. Some time later they were superheated by substituting 24 flues for 128 tubes. Ultimately, all but 3 locomotives had the dimensions shown in the specs, which include the contribution of a Nicholson thermic syphon to firebox heating surface area.

1104 was destroyed in a boiler explosion at Valley Park, Mo on 30 April 1933, 1101 was "dismissed from service" in September 1936 and 1110 in November 1936. All of the other members of the class operated into the later 1940s and early 1950s, with 1107 retiring first in September 1947 and 1102 & 1111 being dismissed in June 1951.


Class 1400 (Locobase 4210)

Ten-wheelers profiled in Railroad Gazette (8 May 1908) that began work on the Frisco as passenger engines. Works numbers were 32285, 32303, 32341-32343, 32393-32394, and 32418-32419 in December 1907.

Very few engines were delivered with this particular combination of bore and stroke. Few Ten-wheelers had cylinders this big in any case, yet their 13" piston valves actuated by the still-rare Walschaert's gear seem well-sized to keep up with demand. The 1400s were never converted to oil burning, although their boilers were superheated (see Locobase 8639).


Class 1400 - superheated (Locobase 8639)

Data from SL&SF 1930, SL&SF 11-1943, and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Locobase 4210 shows the 1400 class as delivered. In the 20s, the railroad superheated this class in a process that sacrificed 157 tubes for 26 flues and added 13" piston valves. At some point, the firebox gained a Nicholson thermic syphon.

Although they sat in storage for a while, their revival during World War Two kept them in service until the end of steam on the Frisco. According to the All-Time Diagrams, the class was "dismissed from service" between March 1950 and November 1951.


Class 141/541 (Locobase 8607)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 21, p. 155. Works numbers were 15850-15854 in May 1898.

This quintet of Vauclain compounds was half a class of Ten-wheelers delivered by the Philadelphia, PA builder in 1898; the other, simple-expansion half is shown in Locobase 8606. After the simples were delivered, the compounds followed in the same month of May 1898. They had two 12" (305 mm) piston valves, each one serving the HP and LP cylinder on one side of the smokebox.

The 1908 Description book shows that all had been simpled by then. See Locobase 8606 for the resulting specifications.


Class 146 / 506 (Locobase 8603)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 1471-1480 in August-September 1893.

Just preceding the local passenger quartet rolling on 63"-diameter drivers (Locobase 8602) was this batch from Pittsburgh, which were essentially repeats of the 1890 engines described in Locobase 8602. During their service years, almost all saw reduction in their tube count to 200 (509-510), 194 (508, 511-512), and 187 (506-507, 514-515) with commensurate reductions in heating surface (to 1,461 sq ft, 1,422 sq ft, and 1,367 sq ft, respectively)..

Although 513 was "dismissed from service" as early as November 1925 and most of the class was disposed of over the next decade, 510 ran until October of 1937 and 507 endured until January 1939.


Class 166 / 416 (Locobase 8592)

Data from StLSF 1904 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 1572-1577 in March 1884.

Although all 6 were procured as a batch from Cooke, the first was a bit smaller and more like the earlier Rogers engine shown in Locobase 8591.


Class 172 / 422 (Locobase 8593)

Data from StLSF 1904 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 1596-1601 in July 1884.

Locobase 8592 shows the first 6 of the Cooke Ten-wheelers that came to the Frisco in 1884. The later set of 6 were virtually identical except for a slightly larger grate.


Class 178 / 428 (Locobase 8594)

Data from StLSF 1904 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 13, p. 243. Works numbers were 8747-8748, 8751-8756 in August 1887 and 8758-8759 in September 1887.

Baldwin Ten-wheelers were delivered in a broken batch. As delivered they had larger boiler than usual for the grate that heated it. Including the firebox, the ratio of grate area to heating surface came close to 95:1. Baldwin estimated adhesion weight as 75,000 lb (34,019 kg), clearly quite a bit higher.

Some time later, the railroad removed (or simply stoppered) 44 of the tubes, which achieved a better balance between tube area and grate area. Tube heating surface dropped to 1,223 sq ft (113.6 sq m) and evaporative heating surface area fell to 1,337 sq ft (124.26 sq m).

Half were dismissed from service in July-August 1915, 4 more in the twenties (one each in 1923 and 1924, 2 in 1926). The last - 430 -- held on until September 1934.


Class 188 / 438 (Locobase 8595)

Data from DeGolyer,Volume 18, p. 170. See also StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 13299-13300, 13310-13311, 13331 in March; 13446-13448, 13457, and 13467 in April.

This set of Ten-wheelers

Some time later, the railroad removed tubes and reduced heating surface area. The All-Time diagram book notes that a majority of the locomotives wound up with 220 to 225 tubes (1,690-1725 sq ft in tube heating surface). Some saw an even greater loss of 25 tubes and a consequent heating surface area of 1,613 sq ft (1,49.91 sq m).

The first retirements came in 1926 (445, 444, 440). Two more were dismissed in March 1928 (442, 446), 439 left in December 1933, 438 & 447 in September 1934, and 443 was retired in November 1936.

Only 441 was sold to another railroad, going to the Delta Valley & Southern Railway in July 1936.


Class 21 / 573 (Locobase 8611)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 2417-28 in December 1902.

This class was delivered with 320 tubes, but at some point the railroad (the St L, M & SE or the Frisco) either removed or plugged 58 of those tubes.


Class 2692 (Locobase 8641)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

This quartet of Ten-wheelers originally came to the KC, M & B as Manchester-built locomotives in 1886. They were rebuilt by the railroad in 1897. When the KC, B & M was bought by the Frisco in 1928, three of the engines had been retired (August 1915, April 1915, and May 1916). The Frisco saw the last "dismissed from service" on 26 February 1935.


Class 38 / 479 (Locobase 8597)

Data from DeGolyer, Volume 35, p. 204 and SL&SF 1930 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 34877-34880, 34887-34888 in June 1910.

These Ten-wheelers had a relatively small cylinder volume considering how late in the day they were produced. In general, they were small engines that proved quite serviceable. A few were later fitted with oil burners.


Class 403 (Locobase 6776)

Data from KCC&S 1884 Locomotive Diagrams and SL&SF7 -1904 Description of Locomotives supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 9, pp. 62 and 198. Works numbers were 4523-4524 in January 1879; 4816, 4819-4820, 4822 in October; 4851, 4854, 4868, 4870 in November; and 5094 in May 1880.

A little Internet digging turns up the story of the "Leaky Roof", as the Kansas City, Clinton & Springfield was known. See http://tacnet.missouri.org/~mgood/clintonrr/leakyroof.html (visited 21 August 2005) and a summary on Locobase 6777.

Locobase loves the classic profile of this vintage 4-6-0. The firebox sat between the last two drivers with the rear dome perched over the middle driving axle. A cone connected the taller firebox course with a much smaller-diameter course. On that course sat the forward dome, the bell, and leading the assembly a tall, straight stack

Sometime after the class received their final set of numbers, 403-404 were shown with exactly the same specifications as the 407-408, but ten fewer fire tubes. Although the 1904 Description book shows that all had 162 tubes (three fewer than the original configuration), it also reveals that some had 18" and others the original 19" cylinders.


Class 410 (Locobase 8591)

Data from StLSF 1904 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.


Class 448 (Locobase 8596)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 3848-3867 in December 1887 (they got the higher ten numbers from the Frisco when that railroad merged motive power) and 3871-73, 3885, 3894-95, and 3906-3910 January-March 1888.

These Paterson-built engines had a healthy amount of grate area for their time as well as one of the largest fireboxes, possibly because of the low quality of the coal they had to burn.


Class 487 (Locobase 8601)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 1481-1484 in October 1893.

This small class followed a larger group of Ten-wheelers (Locobase 8602) onto the KC, FS & M in the 1890s as well as a 10-locomotive batch from the same year (Locobase 8603); they differed from both classes primarily in having taller drivers and thus being more of a local passenger engine design . The diagrams from the various years suggest that the method of measuring heating surface may have changed. In 1904, this class was credited with 246 tubes and a tube heating surface of 1,298.62 sq ft. But in the later diagram, 220 tubes of the same diameter and length yield 1,439.9 sq ft of space. Locobase wonders if the earlier calculation came from the "fire side".

Retirements began in November 1926 when 492 was "dismissed from service". The last -- 498 --was withdrawn ("dismissed" as well) in November 1936.


Class 491 (Locobase 8602)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 1176-1189 in October-November 1890..

The KC, FS & M bought a large batch of Ten-wheelers at the start of the 1890s. Over the years the tube count and area varied over the class, resulting in a variety of heating surface totals. Also, the Frisco's way of calculating tube heating surface seems to have differed from the KC, FS & M in that the latter seems to have calculated the figure based on the inside diameter (fire side) of the tube, which was in line with continental European practice, but not that of the United States or Great Britain.

After several decades of service, the first - 487 - was retired in March 1928, followed by 489 (July 1932), 490 (September 1934, and finally 488 (November 1936).


Class 516 / 610 / 634 (Locobase 8604)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were:

1903

August 22695, 22710-22711, 22735-22736, 22740, 22755

September 22778, 22786, 22804, 22823, 22830, 22842, 22850, 22866-22867, 22882-22883, 22900

October 22919, 22927, 22933, 22984, 22988, 22999, 23098-23099, 23106-23107

December 23359, 23363, 23373, 23408-23409, 23428, 23442, 23473-23474

1904

January 23488, 23496-23497, 23511, 23542, 23619

February 23680, 23683-23685, 23692-23694, 23700-23701, 23710, 23715-23716, 23722, 23738, 23766-23767, 23796-23797, 23804-23805

March 23815-23816, 23846-23847, 23884

Like many of the Frisco Ten-wheelers, this class was delivered with more fire tubes in its boiler than it would carry during most of its career. Beginning with 312 tubes and a total heating surface of 2,560 sq ft, the boiler soon saw reductions to 285 (2,361 sq ft total heating surface), 283, 282, 281, 279, 277, 276, 275, & 271 tubes (2,251 sq ft total heating surface). Most settled into the 277-tube configuration shown in the specs. Several had their cylinders bushed to 20" diameters.

The Frisco divided this Baldwin production into several groups, but Locobase sees no differences among them. Works numbers ran intermittently from 22695 in September 1903 to 23710 in March 1904, but the road numbers were not assigned in the same order.

The DeGolyer microfilm of the 1903 order for 624-628 shows that the railroad originally ordered these as 69"-drivered passenger engines with larger boilers (312 tubes and total heating surface of 2,577 sq ft). Apparently they were delivered as such, or so the 1904 Diagram book suggests. But by the 1908 Description of Equipment, the 5 are shown as part of this large series of 62" freight locomotives.

None of the class was superheated. 620-623 originally operated under the St Louis, Memphis & Southeastern herald.

525 & 530 were sold to the New Orleans, Texas & Mexico in May 1916 to be their #61-62. The first to be "dismissed from service" was 524 in June 1927 while the last -- 522 -- ran until February 1939.


Class 539 (Locobase 8606)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 21, p 154. Works numbers were 15827-15831 in April 1898.

This was half a class of Ten-wheelers delivered by the Philadelphia, PA builder in 1898; the other half is shown in Locobase 8607 because it was a balanced compound design.

The 1908 Description book shows that all had been simpled by then, so the compounding experiment lasted only a short time. The 1904 book showed a boiler with 14 ft 7 1/2" (4.56 m) tubes. That increased the tube area by 88 sq ft (8.18 sq m) to 2,038 sq ft. (189.34 sq m). Combined with a higher firebox area of 191 sq ft (17.75 sq m ), total evaporative heating surface area grew to 2,229 sq ft (207.08 sq m).

The class was later converted to 0-6-0 switchers and renumbered 3539, etc.


Class 549 (Locobase 8608)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 2317-2323, 2331, 2325 in October 1901.

Although delivered with 264 tubes and shown with that count in the specifications, the class is shown in the later All Time diagram as having had a great variety of tube counts: 222 (1,670 sq ft), 226 (1,697.4), 228 (1,711), 230 (1,724.5), 238 (1,805), and 242.


Class 560 (Locobase 8609)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 26087-26096 in November 1902.

Although delivered with 280 tubes and a total heating surface measured at 2,185.6 sq ft, the class saw reductions in tube count to 270 (560, 564), 269 (as shown in the specs), 254 (560), and 243 tubes. The class was delivered to the grandly named St L, SF & NO, which ran from Hope, Arkansas to Ardmore, Oklahoma. The Frisco bought the line on April 30, 1907 and transformed the Hope, Ark to Fallon, Okla segment into the Arkinda Sub-Division and the Hugo-Ardmore as the Ardmore Sub-Division.

The All Time diagram book notes that 561-563 were "dismissed from service" in July 1932.


Class 568 (Locobase 8610)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 21339, 21370-72 in December 1902 and 21444 in January 1903.

This class was delivered with 296 tubes and a total of 2,067.4 sq ft in heating surface, but all had their counts reduced, 3 to the 263 shown in the specifications,


Class 575 (Locobase 8612)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 2378-87 in April-May 1902.

Like most of the Frisco Lines Ten-wheelers, these were delivered with more tubes than later diagrams would show. From 290 tubes and a total heating surface of 2,135 sq ft, the class sorted itself into groups of 5 with 254 tubes as shown in the specs (575-577, 580, 582), 3 with 262 tubes (1945.5 sq ft - engines 579, 583-84), and 260 tubes (1,931.9 sq ft - 580). All Time diagram as having had a great variety of tube counts: 222 (1,670 sq ft), 226 (1,697.4), 228 (1,711), 230 (1,724.5), 238 (1,805), and 242.


Class 585 (Locobase 8613)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 26767-26776 in March-April 1903..

These were essentially identical to the Pittsburgh locomotives described in Locobase 8612, but with taller drivers. Like most of the Frisco Lines Ten-wheelers, these were delivered with more tubes than later diagrams would show. From 280 tubes and a total heating surface of 1,978 sq ft, most were later reconfigured as shown in the specs.


Class 595 / 669 (Locobase 8614)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 27374-27378 in August 1903 and 28700-28724 in September-October 1903

This set of Ten-wheelers followed by a couple of months the 10 others delivered by Dickson (Locobase 8613). Delivered with the number of tubes shown in the specs, all of the locomotives would have some deleted over time. According to the All Time diagram book, many of the later locomotives ultimately held 227 tubes in their boilers and offered a total of 1,698 sq ft of heating surface.

Six -- 675, 670, 671, 674, 676, & 678 -- were sold to the New Orleans, Texas & Mexico in May 1916 as their 62-67, respectively.


Class 600 (Locobase 8616)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 25331-25335 in March 1902.

This class of 5 immediately followed the quintet described in Locobase 8615, which had about as many 2 1/4"-diameter tubes as this group had 2" tubes. Obviously, the intent was to compare the performance of the two configurations. Since the earlier engines were later refitted with 2" tubes, it seems the Frisco preferred a less-dense layout (likely for heat-circulation and sturdiness reasons).

All of the locomotives surrendered a few tubes in their later careers


Class 605 (Locobase 8615)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 25321-25325 in January 1902.

This class of 5 was originally delivered with the specifications shown, apparently as a test of two configurations. This quintet had 2 1/4"-diameter tubes while the five that followed immediately had about as many 2" tubes.

Although the heating surface area was much greater using the larger tubes, the class did not retain them. During later reconstructions, the cylinder diameter was bushed down to 19 1/4"; tractive effort then amounted to 23,700 lb. Also, the boiler tubes were replaced by fewer, smaller-diameter tubes. In two cases, this resulted in a layout of 246 2" tubes totalling 1,971.5 sq ft including the firebox heating surface. Then all except the 609 were given 260 tubes for a total of 2,074 sq ft.


Class 624 (Locobase 11551)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 26, p. 28. Works numbers were 23488, 23497, 23511, 23542, 23619 in January 1904. See also SL&SF 1904 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Although several builders supplied several batches of passenger Ten-wheelers to the Frisco and its subsidiaries, only this quintet had this particular cylinder volume. Fitted with one of the larger boiler capacities, the design had a good-sized grate, but relatively low firebox heating surface ratio.

Connelly lists this quintet as having the 2nd set of road numbers 624-628. This may explain the apparent discrepancy between the listings found in later Frisco books (e.g,., the 1908 Description of Equipment) which show the 624-628 to have been part of the long series of freight Ten-wheelers described in Locobase 8604. Yet the Frisco's 1908 credits the freighter series with the 5 works numbers assigned to this class by Connelly.


Class 629 - superheated (Locobase 8617)

Data from StLSF 1908 Locomotive description and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

These appear to be among the few Ten-wheelers to have been superheated by the Frisco. Their Alco-Schenectady boilers (works #38115-38119 in October 1905) originally contained 318 2" tubes, from which assembly 126 were deducted to make room for the 24 superheater flues. While the resulting superheat gain was relatively modest, it was in line with other such conversions and steam admission now came through sizable 12"diameter piston valves.


Class 667 (Locobase 8647)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

These were small Ten-wheelers even for the early 1880s. They were produced as a pair in June 1882. Rogers followed with 6 more somewhat larger engines; see Locobase 8648.


Class 670 (Locobase 8648)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

A pair of Rogers engines went to the KC, FS & M in 1882 (Locobase 8647) and that Paterson-based builder supplied this sextet in April-May 1885. Like the earlier Ten-wheelers, these were small for the time. The class remained in service for several decades, however, possibly because they offered such a low axle loading -- and they were paid for.


Class 676 (Locobase 8650)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works #2006-2011 (August 1888), 2290-2294 (November 1888), 2300-2305 (November-December 1889).

This was a relatively big class of Ten-wheeler freighters that were delivered in three batches as road numbers 682-687, 688-691, and 676-681 respectively.


Class 695 - superheated (Locobase 8618)

Data from StLSF 1908 Description and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Twenty-five Ten-wheelers were originally delivered by Alco's Brooks works in June 1906 (works 39922-946). A few months earlier, Alco-Schenectady had produced 15 identical engines for the Kansas City, Fort Scott & Memphis (works #38120-38134).

When they entered service, the locomotives had 364 2" tubes. Later on, this class was updated with the removal of 150 small tubes in favor of the 28 larger superheater flues shown in the specs. In addition to a relatively sizable superheat ratio, the design now benfited from 12" piston valves. The Schenectady locomotives retained their Stephenson gear, for some reason . A few later had their brick arches removed along with the arch tubes. This reduced total heating surface area by 30 sq ft. Three were converted to oil burning.

698 lasted until 1950, at which time it was sold to the Alabama Central. Most of the rest seem to have operated well into the 1940s and early 1950s.


Class 700 - compound (Locobase 8619)

Data from StLSF 1908 Description and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 28725-28729 in December 1903 and January 1904.

The Frisco spent very little time or energy exploiting compound locomotive designs. Among the few locomotives were these 5 cross-compounds. The ratio between the two cylinder volumes was a bit higher than the norm. In any event, the railroad soon reconfigured the class as simple-expansion locomotives; see Locobase 8620.


Class 700 - simple-expansion (Locobase 8620)

Data from StLSF 1908 Description and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers ran 27374-27378 in August 1903 and 28700-28724 in September-October 1903

When the Frisco simpled the cross-compounds it had bought in 1903 (see Locobase 8619), it also reduced the tube count while lengthening each tube by a foot.


Class 742 (Locobase 8621)

Data from StLSF 1904, StLSF 1908 description, and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.. Baldwin works numbers for this batch ran 21397-99, 21412-13, and 21430 in January 1903 (road #779-784) and 121559, 21565, 21571-72, 21609, 21647, 21657, 21667 in March 1903.

Even though Samuel Vauclain had already begun to doubt that compounding conferred any signficant savings on a locomotive's operation, he continued to build them for buyers who asked. So, in 1903, two of the Frisco's leased lines -- and the Frisco itself -- received batches of Vauclain compounds, all built to the same design. Locobase shows these orders, and two others built to the same design but using simple-expansion cylinders as 5 separate entries largely to commemorate the variety of railroad names usually subsumed under one rather bland rubric.

Sometime later, all of these were rebuilt to a common, simple-expansion design; see Locobase 8626.


Class 742 - simple (Locobase 8626)

Data from StLSF 1904, StLSF 1908 description, and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Baldwin works # ran 21431, 21458, 21472, and 21465 in January 1903.

Locobases 8621-8625 show the 5 batches of Baldwin Ten-wheelers, including 33 Vauclain compounds, all built to a common design that were delivered to 5 different Frisco Line railroads. The last 25 had the 21" x 28" simple-expansion layout, but the original tube count and grate area. Ultimately all 58 engines had a variety of tube counts and firebox layouts. For example, 20 had brick arches and arch tubes that added to 16.8 sq ft to the firebox heating surface. tube counts ranged from 293 (total heating surface of 2,508 sq ft) down to 287 (2,473 sq ft).


Class 750 (Locobase 8625)

Data from StLSF 1904, StLSF 1908 description, and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.. Baldwin works numbers were 21787, 21791, 21797, 21830, 21836, 21863, 21874, 21891 in March 1903; 21944, 21955, 22074 in April; and 22115, 22161 in May 1903

As noted in Locobase 8621, 33 Vauclain compounds built to a common design were delivered to 3 different Frisco Line railroads. This was the parent company's dozen.

Sometime later, all of these were rebuilt to a common, simple-expansion design; see Locobase 8626.


Class 763 (Locobase 8622)

Data from StLSF 1904, StLSF 1908 description, and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.. Baldwin works numbers for this railroad's batch ran 21469-71, 21480-81, 21525, 21528-29, 21535-36, 21542, 21564, all in February 1903.

As noted in Locobase 8621, 33 Vauclain compounds built to a common design were delivered to 3 different Frisco Line railroads. The OC & W was incorporated on 15 July 1899 and had a line from OKC to Quanah, Texas by 1903. In 1907, the Frisco purchased the OC & W and redesignated it the Chickasha Sub-Division of the Southwestern Division.

Sometime later, all of these were rebuilt to a common, simple-expansion design; see Locobase 8626


Class 775 (Locobase 8623)

Data from StLSF 1904, StLSF 1908 description, and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.. Baldwin works numbers were 21431, 21458, 21472, and 21465 in January 1903.

As Baldwin was delivering compounds to the B, E & SW, the OC & W, and the Frisco itself, it supplied identical locomotives with a simple-expansion cylinder design to the St L, M & SE and to the St L, SF & NO (Locobase 8624).

All five railroads' Baldwins would eventually be rebuilt to the same simple-expansion design; see Locobase 8626.


Class 785 (Locobase 8624)

Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 21751, 21761, 21766-21767 in March 1903; 21954, 21969, 21972, 21979, 21996, 22011, 22018, 22030, 22035, 22056 in April.

Although the Baldwin was building compounds for the B, E & SW, the OC & W, and the Frisco itself, it produced identical locomotives with a simple-expansion cylinder design for the St L, M & SE (Locobase 8623) and for the Arkansas & Choctaw, which numbered them 630-644, but which was bought by the Frisco before the batch was delivered. The Frisco renumbered them and assigned them to the St L, SF & NO, possessor of perhaps the most grandly scaled name of any Frisco component.

Sometime later, all of these were rebuilt to a common, simple-expansion design; see Locobase 8626.


Class 8 (Locobase 14149)

Data from DeGolyer, Vol 48, p. 266. Works number was 43019 in August 1913.

The Alco Moguls described in Locobase 8590 were four years older, but heavier. They had bigger boilers and grates. This Ten-wheeler offered nearly the same power on one more axle.

Although the 8 received a Frisco number in July 1930, Locobase cannot determine how long the engine operated as a Frisco locomotive.

Specifications by Steve Llanso of Sweat House Media
Class110014001400 - superheated141/541146 / 506
Locobase ID8636 4210 8639 8607 8603
RailroadSt Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)Kansas City, Fort Scott & Memphis (SLSF)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class121010510
Road Numbers1100-11111400-14091400-1409141-145/541-545146-155 / 506-515
GaugeStdStdStdStdStd
Number Built1210510
BuilderAlco-SchenectadyBurnham, Williams & CoFriscoBurnham, Williams & CoPittsburgh
Year19071907192918981893
Valve GearWalschaertWalschaertWalschaertStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)15.8315.8315.831311.83
Engine Wheelbase (ft)26.8326.8326.832422.33
Ratio of driving wheelbase to overall engine wheebase 0.59 0.59 0.59 0.54 0.53
Overall Wheelbase (engine & tender) (ft)55.0657.8357.3750.3348.96
Axle Loading (Maximum Weight per Axle) (lbs)38,500
Weight on Drivers (lbs)139,400141,050143,000113,60099,000
Engine Weight (lbs)188,850194,450196,000148,416121,000
Tender Loaded Weight (lbs)141,200120,550135,30091,90077,150
Total Engine and Tender Weight (lbs)330,050315,000331,300240,316198,150
Tender Water Capacity (gals)60006000600040004000
Tender Fuel Capacity (oil/coal) (gals/tons)33001214108
Minimum weight of rail (calculated) (lb/yd)7778796355
Geometry Relating to Tractive Effort
Driver Diameter (in)6969696357
Boiler Pressure (psi)200200200180160
High Pressure Cylinders (dia x stroke) (in)21" x 26"23" x 26"23" x 26"15" x 24"19" x 26"
Low Pressure Cylinders (dia x stroke) (in)25" x 24"
Tractive Effort (lbs)28,25033,88733,88719,28622,395
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.93 4.16 4.22 5.89 4.42
Heating Ability
Firebox Area (sq ft)191172217177.70161
Grate Area (sq ft)47.7047.7047.703424.80
Evaporative Heating Surface (sq ft)21483039241021141598
Superheating Surface (sq ft)405508
Combined Heating Surface (sq ft)25533039291821141598
Evaporative Heating Surface/Cylinder Volume206.08243.07192.76430.66187.29
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation95409540954061203968
Same as above plus superheater percentage11,066954011,16261203968
Same as above but substitute firebox area for grate area44,31234,40050,77831,98625,760
Power L114,891717314,84041624281
Power MT706.51336.34686.36242.31286.00

Specifications by Steve Llanso of Sweat House Media
Class166 / 416172 / 422178 / 428188 / 43821 / 573
Locobase ID8592 8593 8594 8595 8611
RailroadSt Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis, Memphis & Southeastern (SLSF)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class6610102
Road Numbers166-171 / 416-421172-177/ 422-427178-187/428-437188-197/ 438-447573-574
GaugeStdStdStdStdStd
Number Built6610102
BuilderCookeCookeBurnham, Parry, Williams & CoBurnham, Williams & CoAlco-Pittsburgh
Year18841884188718931902
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)13.5013.7213.501212
Engine Wheelbase (ft)24.6224.9623.5822.7522.67
Ratio of driving wheelbase to overall engine wheebase 0.55 0.55 0.57 0.53 0.53
Overall Wheelbase (engine & tender) (ft)46.9247.2546.2152.7551.86
Axle Loading (Maximum Weight per Axle) (lbs)22,90022,90023,50035,706
Weight on Drivers (lbs)67,10067,10069,500107,500131,000
Engine Weight (lbs)91,10091,10096,950132,200158,400
Tender Loaded Weight (lbs)72,30072,30072,30086,600109,200
Total Engine and Tender Weight (lbs)163,400163,400169,250218,800267,600
Tender Water Capacity (gals)40004000300040005000
Tender Fuel Capacity (oil/coal) (gals/tons)88882300
Minimum weight of rail (calculated) (lb/yd)3737396073
Geometry Relating to Tractive Effort
Driver Diameter (in)6363596463
Boiler Pressure (psi)145145145165180
High Pressure Cylinders (dia x stroke) (in)19" x 24"19" x 24"19" x 24"19" x 24"20" x 26"
Tractive Effort (lbs)16,95016,95018,09918,98625,257
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.96 3.96 3.84 5.66 5.19
Heating Ability
Firebox Area (sq ft)109.50112.50121.40161.20170
Grate Area (sq ft)16181726.5030
Evaporative Heating Surface (sq ft)17181721160917741918
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)17181721160917741918
Evaporative Heating Surface/Cylinder Volume218.14218.52204.30225.25202.88
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation23202610246543735400
Same as above plus superheater percentage23202610246543735400
Same as above but substitute firebox area for grate area15,87816,31317,60326,59830,600
Power L143804414401257665534
Power MT431.72435.08381.80354.75279.40

Specifications by Steve Llanso of Sweat House Media
Class269238 / 479403410448
Locobase ID8641 8597 6776 8591 8596
RailroadKansas City, Memphis & Birmingham (SLSF)St Louis, Brownsville & Mexico (SLSF)Kansas City, Clinton & Springfield (SLSF)St Louis-San Francisco (Frisco/(SLSF)Kansas City, Fort Scott & Memphis (SLSF)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class4610620
Road Numbers2692-269538-43 / 479-48440-49/150-159/400-409160-165 / 410-415138+/ 448-467
GaugeStdStdStdStdStd
Number Built4610620
BuilderFriscoBaldwinBurnham, Parry, Williams & CoRogersRogers
Year18971910187918801887
Valve GearStephensonWalschaertStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)1315.8313.1713.3313.08
Engine Wheelbase (ft)2426.8323.7923.8323.45
Ratio of driving wheelbase to overall engine wheebase 0.54 0.59 0.55 0.56 0.56
Overall Wheelbase (engine & tender) (ft)50.3357.8346.4245.08
Axle Loading (Maximum Weight per Axle) (lbs)20,60024,300
Weight on Drivers (lbs)76,90098,00060,60071,90091,000
Engine Weight (lbs)103,200130,00086,40095,100116,400
Tender Loaded Weight (lbs)84,600120,55076,70072,30071,000
Total Engine and Tender Weight (lbs)187,800250,550163,100167,400187,400
Tender Water Capacity (gals)40006000400040003250
Tender Fuel Capacity (oil/coal) (gals/tons)812887
Minimum weight of rail (calculated) (lb/yd)4354344051
Geometry Relating to Tractive Effort
Driver Diameter (in)536355.505656
Boiler Pressure (psi)150180135130160
High Pressure Cylinders (dia x stroke) (in)18" x 24"19" x 24"19" x 24"19" x 24"19" x 24"
Tractive Effort (lbs)18,70621,04117,91317,09621,041
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.11 4.66 3.38 4.21 4.32
Heating Ability
Firebox Area (sq ft)141.90123.109996169
Grate Area (sq ft)171715.301630.35
Evaporative Heating Surface (sq ft)14701713121614991570
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)14701713121614991570
Evaporative Heating Surface/Cylinder Volume207.96217.50154.40190.33199.34
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation25503060206620804856
Same as above plus superheater percentage25503060206620804856
Same as above but substitute firebox area for grate area21,28522,15813,36512,48027,040
Power L140855588271330494579
Power MT351.33377.12296.10280.47332.80

Specifications by Steve Llanso of Sweat House Media
Class487491516 / 610 / 634539549
Locobase ID8601 8602 8604 8606 8608
RailroadKansas City, Fort Scott & Memphis (SLSF)Kansas City, Fort Scott & Memphis (SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)Kansas City, Fort Scott & Memphis (SLSF)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class4147959
Road Numbers343, 113-115 / 487-490101-109+ / 491-504516-530, 610-628, 634-668139-140, 146-148/539-540, 546-548549-557
GaugeStdStdStdStdStd
Number Built4147959
BuilderPittsburghPittsburghBurnham, Williams & CoBurnham, Williams & CoPittsburgh
Year18931890190318981901
Valve GearStephensonStephensonWalschaertStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)1211.83141313
Engine Wheelbase (ft)22.6722.6725.082423.62
Ratio of driving wheelbase to overall engine wheebase 0.53 0.52 0.56 0.54 0.55
Overall Wheelbase (engine & tender) (ft)50.4856.5850.3351.66
Axle Loading (Maximum Weight per Axle) (lbs)45,75038,50042,400
Weight on Drivers (lbs)103,00099,000129,200113,600120,000
Engine Weight (lbs)130,000121,000173,600148,416149,600
Tender Loaded Weight (lbs)77,15074,100134,00091,900111,300
Total Engine and Tender Weight (lbs)207,150195,100307,600240,316260,900
Tender Water Capacity (gals)35003800600040005000
Tender Fuel Capacity (oil/coal) (gals/tons)78121012
Minimum weight of rail (calculated) (lb/yd)5755726367
Geometry Relating to Tractive Effort
Driver Diameter (in)6357636363
Boiler Pressure (psi)160155200180200
High Pressure Cylinders (dia x stroke) (in)19" x 26"19" x 26"20.5" x 26"20" x 24"20" x 26"
Tractive Effort (lbs)20,26221,69529,48423,31428,063
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.08 4.56 4.38 4.87 4.28
Heating Ability
Firebox Area (sq ft)162.62161.60122.70177.70164
Grate Area (sq ft)24.8024.9042.503429.97
Evaporative Heating Surface (sq ft)16021606229821131965
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)16021606229821131965
Evaporative Heating Surface/Cylinder Volume187.76188.23231.36242.13207.85
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation39683860850061205994
Same as above plus superheater percentage39683860850061205994
Same as above but substitute firebox area for grate area26,01925,04824,54031,98632,800
Power L147554166615665016186
Power MT305.33278.32315.13378.49340.94

Specifications by Steve Llanso of Sweat House Media
Class560568575585595 / 669
Locobase ID8609 8610 8612 8613 8614
RailroadSt Louis, San Francisco & New Orleans (SLSF)St Louis, San Francisco & New Orleans (SLSF)Kansas City, Fort Scott & Memphis (SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class85101030
Road Numbers560-567568-572575-584585-594595-599, 669-693
GaugeStdStdStdStdStd
Number Built85101030
BuilderAlco-CookeBurnham, Williams & CoPittsburghAlco-DicksonAlco-Dickson
Year19021902190219031903
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)12.5012.50131313
Engine Wheelbase (ft)2323.3323.6223.6223.58
Ratio of driving wheelbase to overall engine wheebase 0.54 0.54 0.55 0.55 0.55
Overall Wheelbase (engine & tender) (ft)51.6752.4252.2953.2553.33
Axle Loading (Maximum Weight per Axle) (lbs)45,00043,70043,00045,50044,100
Weight on Drivers (lbs)126,000123,700126,000126,700124,750
Engine Weight (lbs)160,000150,800153,000161,200159,750
Tender Loaded Weight (lbs)130,000120,60091,700109,300109,300
Total Engine and Tender Weight (lbs)290,000271,400244,700270,500269,050
Tender Water Capacity (gals)60006000430050005000
Tender Fuel Capacity (oil/coal) (gals/tons)1412101010
Minimum weight of rail (calculated) (lb/yd)7069707069
Geometry Relating to Tractive Effort
Driver Diameter (in)6363576363
Boiler Pressure (psi)190190185185200
High Pressure Cylinders (dia x stroke) (in)20" x 26"20" x 26"20" x 26"20" x 26"20" x 26"
Tractive Effort (lbs)26,66026,66028,69125,95928,063
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.73 4.64 4.39 4.88 4.45
Heating Ability
Firebox Area (sq ft)179.50175167.80167.80158
Grate Area (sq ft)3535303030.20
Evaporative Heating Surface (sq ft)20572013189118911955
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)20572013189118911955
Evaporative Heating Surface/Cylinder Volume217.58212.93200.02200.02206.79
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation66506650555055506040
Same as above plus superheater percentage66506650555055506040
Same as above but substitute firebox area for grate area34,10533,25031,04331,04331,600
Power L162356094507556096098
Power MT327.28325.83266.39292.80323.30

Specifications by Steve Llanso of Sweat House Media
Class600605624629 - superheated667
Locobase ID8616 8615 11,551 8617 8647
RailroadSt Louis, San Francisco & New Orleans (SLSF)St Louis, San Francisco & New Orleans (SLSF)St Louis-San Francisco (Frisco/(SLSF)Kansas City, Fort Scott & Memphis (SLSF)Kansas City, Fort Scott & Memphis (SLSF)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class55552
Road Numbers600-604605-609624-628629-633667-668
GaugeStdStdStdStdStd
Number Built55552
BuilderAlco-RichmondAlco-RichmondBurnham, Williams & CoAlco-SchenectadyRogers
Year19021902190319051882
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)14.3314.331415.8313.33
Engine Wheelbase (ft)24.6224.6225.0826.8323.60
Ratio of driving wheelbase to overall engine wheebase 0.58 0.58 0.56 0.59 0.56
Overall Wheelbase (engine & tender) (ft)47.3347.3355.06
Axle Loading (Maximum Weight per Axle) (lbs)45,35045,350
Weight on Drivers (lbs)130,500130,500126,500136,50063,000
Engine Weight (lbs)167,700167,700163,500182,50088,000
Tender Loaded Weight (lbs)111,600111,600120,000132,80060,240
Total Engine and Tender Weight (lbs)279,300279,300283,500315,300148,240
Tender Water Capacity (gals)50005000600060002800
Tender Fuel Capacity (oil/coal) (gals/tons)121214 5.50
Minimum weight of rail (calculated) (lb/yd)7373707635
Geometry Relating to Tractive Effort
Driver Diameter (in)6969696953
Boiler Pressure (psi)190190200200135
High Pressure Cylinders (dia x stroke) (in)20" x 28"20" x 28"21" x 26"21" x 26"18" x 24"
Tractive Effort (lbs)26,21426,21428,25028,25016,836
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.98 4.98 4.48 4.83 3.74
Heating Ability
Firebox Area (sq ft)175.40189140.80195117.80
Grate Area (sq ft)28.5030.2043.6047.8015.70
Evaporative Heating Surface (sq ft)21442363257721521203
Superheating Surface (sq ft)405
Combined Heating Surface (sq ft)21442363257725571203
Evaporative Heating Surface/Cylinder Volume210.59232.10247.24206.47170.19
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation54155738872095602120
Same as above plus superheater percentage54155738872011,0902120
Same as above but substitute firebox area for grate area33,32635,91028,16045,24015,903
Power L164837099724014,9443023
Power MT328.56359.78378.53724.08317.36

Specifications by Steve Llanso of Sweat House Media
Class670676695 - superheated700 - compound700 - simple-expansion
Locobase ID8648 8650 8618 8619 8620
RailroadKansas City, Fort Scott & Memphis (SLSF)Kansas City, Fort Scott & Memphis (SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class6164055
Road Numbers670-675 / 2670-2675676-691/ 2676-2691695-699, 705-724, 727-41700-704700-704
GaugeStdStdStdStdStd
Number Built616405
BuilderRogersRhode IslandFriscoAlco-DicksonFrisco
Year18851888190619031903
Valve GearStephensonStephensonWalschaertStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)13.6713.6714.831313
Engine Wheelbase (ft)24.0824.0825.7523.5823.62
Ratio of driving wheelbase to overall engine wheebase 0.57 0.57 0.58 0.55 0.55
Overall Wheelbase (engine & tender) (ft)54.9253.2553.21
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)67,60086,200142,600125,850125,900
Engine Weight (lbs)90,600106,400197,900164,250164,300
Tender Loaded Weight (lbs)62,50069,000132,800109,250109,200
Total Engine and Tender Weight (lbs)153,100175,400330,700273,500273,500
Tender Water Capacity (gals)30003000600050005000
Tender Fuel Capacity (oil/coal) (gals/tons) 5.507141010
Minimum weight of rail (calculated) (lb/yd)3848797070
Geometry Relating to Tractive Effort
Driver Diameter (in)5854636363
Boiler Pressure (psi)140145200200200
High Pressure Cylinders (dia x stroke) (in)18" x 24"18" x 24"21" x 28"22" x 26" (1)20" x 26"
Low Pressure Cylinders (dia x stroke) (in)35" x 26" (1)
Tractive Effort (lbs)15,95417,74833,32024,34028,063
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.24 4.86 4.28 5.17 4.49
Heating Ability
Firebox Area (sq ft)127140206155.50169.50
Grate Area (sq ft)16.9019.2047.7030.1830
Evaporative Heating Surface (sq ft)13771369238319781780
Superheating Surface (sq ft)529
Combined Heating Surface (sq ft)13771369291219781780
Evaporative Heating Surface/Cylinder Volume194.81193.67212.30345.83188.28
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation23662784954060366000
Same as above plus superheater percentage2366278411,25760366000
Same as above but substitute firebox area for grate area17,78020,30048,61631,10033,900
Power L13852382015,29339975837
Power MT376.87293.10709.30210.06306.63

Specifications by Steve Llanso of Sweat House Media
Class742742 - simple750763775
Locobase ID8621 8626 8625 8622 8623
RailroadBlackwell, Enid & Southwestern (SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)Oklahoma City & Western (SLSF)St Louis, Memphis & Southeastern (SLSF)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class13584124
Road Numbers742-749, 779-784742-799750-762763-774775-778
GaugeStdStdStdStdStd
Number Built134124
BuilderBurnham, Williams & CoFriscoBurnham, Williams & CoBurnham, Williams & CoBurnham, Williams & Co
Year19031903190319031903
Valve GearWalschaertStephensonWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)14.4214.3314.4214.4214.42
Engine Wheelbase (ft)26.2525.9226.2526.2526.25
Ratio of driving wheelbase to overall engine wheebase 0.55 0.55 0.55 0.55 0.55
Overall Wheelbase (engine & tender) (ft)54.2854.0154.2854.2854.28
Axle Loading (Maximum Weight per Axle) (lbs)47,20047,20047,20047,200
Weight on Drivers (lbs)138,300138,700138,300138,300138,300
Engine Weight (lbs)189,40018,830189,400189,400189,400
Tender Loaded Weight (lbs)133,400133,400133,400133,400133,400
Total Engine and Tender Weight (lbs)322,800152,230322,800322,800322,800
Tender Water Capacity (gals)60006000600060006000
Tender Fuel Capacity (oil/coal) (gals/tons)1010101010
Minimum weight of rail (calculated) (lb/yd)7777777777
Geometry Relating to Tractive Effort
Driver Diameter (in)6363636363
Boiler Pressure (psi)200200200200200
High Pressure Cylinders (dia x stroke) (in)15.5" x 28"21" x 28"15.5" x 28"15.5" x 28"21" x 28"
Low Pressure Cylinders (dia x stroke) (in)26" x 28"26" x 28"26" x 28"
Tractive Effort (lbs)26,78533,32026,78526,78533,320
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.16 4.16 5.16 5.16 4.15
Heating Ability
Firebox Area (sq ft)134168.80134134134
Grate Area (sq ft)43.9042.5043.9043.9043.90
Evaporative Heating Surface (sq ft)28842481288428842884
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)28842481288428842884
Evaporative Heating Surface/Cylinder Volume471.63221.03471.63471.63256.93
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation87808500878087808780
Same as above plus superheater percentage87808500878087808780
Same as above but substitute firebox area for grate area26,80033,76026,80026,80026,800
Power L143386221433843386649
Power MT207.45296.65207.45207.45317.97

Specifications by Steve Llanso of Sweat House Media
Class7858
Locobase ID8624 14,149
RailroadSt Louis, San Francisco & New Orleans (SLSF)Gulf, Texas & Western (SLSF)
CountryUSAUSA
Whyte4-6-04-6-0
Number in Class151
Road Numbers785-7998 / 467
GaugeStdStd
Number Built151
BuilderBurnham, Williams & CoBaldwin
Year19031913
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)14.4211.33
Engine Wheelbase (ft)26.2522.17
Ratio of driving wheelbase to overall engine wheebase 0.55 0.51
Overall Wheelbase (engine & tender) (ft)54.2853
Axle Loading (Maximum Weight per Axle) (lbs)47,200
Weight on Drivers (lbs)138,30099,000
Engine Weight (lbs)189,400127,500
Tender Loaded Weight (lbs)133,400100,000
Total Engine and Tender Weight (lbs)322,800227,500
Tender Water Capacity (gals)60005000
Tender Fuel Capacity (oil/coal) (gals/tons)108
Minimum weight of rail (calculated) (lb/yd)7755
Geometry Relating to Tractive Effort
Driver Diameter (in)6356
Boiler Pressure (psi)200180
High Pressure Cylinders (dia x stroke) (in)21" x 28"18" x 26"
Tractive Effort (lbs)33,32023,016
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.15 4.30
Heating Ability
Firebox Area (sq ft)134139
Grate Area (sq ft)43.9022.20
Evaporative Heating Surface (sq ft)28841704
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)28841704
Evaporative Heating Surface/Cylinder Volume256.93222.52
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation87803996
Same as above plus superheater percentage87803996
Same as above but substitute firebox area for grate area26,80025,020
Power L166495263
Power MT317.97351.60

Reference