Colorado Southern, New Orleans & Pacific / Jonesboro, Lake City & Eastern / Kansas City, Fort Scott & Memphis / Saint Louis-San Francisco / St Louis, Memphis & Southeastern / St Louis-San Francisco 2-8-0 "Consolidation" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 1200 (Locobase 2442)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005).. Also see table in the June 1907 American Engineer and Railroad Journal (AERJ), referring to an earlier article on p. 194 of the same year. Works numbers were 30310 in February 1907; 30319-30321, 30330-30331, 30355-30359, 30380-30382, 30401, 30408, 30425-30427, 30472, 30483, 30543 in March 1907; 30639, 30665-30666, 30741 in April.

Contemporary coverage suggests that this railroad's origins were difficult to ascertain clearly. Railway Age reported that contrary to the assertion that this was a Frisco subsidiary, the CS, NO & P actually represented a reconstituted Colorado & Southern in hopes of skirting a gubenatorial veto of the original charter. The Financial Review confirmed that ownership belonged to the Frisco and would for 999 years.

The main line linked Baton Rouge. La., to Houston, Tex.. (373 miles) and enjoyed trackage rights over the Illinois Central to New Orleans. Another route took the road from De Quincey to Houston.

First Frisco Consolidation to have more than 3,000 sq ft of heating surface. These retained their slide valves throughout their operating lives.

Some confusion in the FMIG tabulation.. Baldwin delivered 51 (1200-1250) in 1907-1909; the latter half of the order were slightly heavier and are shown in Locobase 2444. 45 more slightly heavier versions (1251-1295) were delivered by Alco-Schenectady, but these were transferred to the Rock Island soon after delivery. Their numbers were reused in two batches. The first 15 went to superheated duplicates supplied by Baldwin in 1909. The remainder (1266-1295) had 26" x 30" cylinders and 63" drivers.


Class 1226 (Locobase 2444)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005). Works numbers were 31936-31937, 31961-31962, 31977-31978, 32000, 32004-32006, 32039-32043, 32073-32076, 32090-32091, 32104 in October 1907; 32154, 32175, 32209 in November; 33735-33738, 33762-33767, 33810-33812, 33822, 33839 in September 1909.

Repeats of the 1200 class (Locobase 2442), but with more weight on the drivers. Although delivered with slide valves, they were later fitted with piston valves.


Class 1226 - superheated (Locobase 8637)

Data from StLSF 1930, StL&SF 1947, and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Originally delivered as saturated-steam Consolidations in 1907, most of this class was superheated in the 1920s. Unusually for such conversions, the net loss of heating surface was held to a minimum. This was probably due to the large diameter of the boiler to begin with.


Class 1266 (Locobase 2445)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005). Works numbers were 34120-34121, 34139-34142 in December; 34165-34167, 34183-34184, 34220-34221, 34226 in January 1910.

Recasting of the basic Frisco Consolidation, this time with longer tubes (but fewer of them), larger cylinders supplied by 12"-diameter piston valves, taller drivers, and even more weight on the drivers. Although they would all be grouped under the same class after being superheated (Locobase 2446), this class was delivered with saturated boilers and with Emerson superheaters (Locobase 13673).


Class 1266 - superheated (Locobase 2446)

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

Although originally supplied by Schenectady in 1910, this class was rebuilt by the Frisco in 1922-1924 for some reason. There were many variations as detailed in the notes to the diagram page, but the version shown in the specs seems to have predominated.

As with the 1306 class, the diagrams record the last out by noting the engines in the class "were dismissed from service between 7-17-51 & 2-25-52."


Class 1281 (Locobase 2443)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005).


Class 1293 (Locobase 13674)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 25, p.211. Works numbers were 35381-35387, 35411-35414, 35441 in October 1910 and 35474 in November.

Firebox heating surface included 32 sq ft of arch tubes. The last 13 of a large class of Consolidations (Locobase 2466) was delivered directly to the New Orleans, Texas & Mexico and had an Emerson superheater installed. The entire class would be updated with Schmidt superheaters in 1922-1924; see Locobase 2446.


Class 1306 (Locobase 2447)

Firebox heating surface included 30 sq ft of arch tubes.

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

The book shows that this class fragmented into several sub-classes over time. One of the two main variants was the one shown in the specs, a type that had thermic syphons. The other had fewer tubes (239 vs 261) and arch tubes instead of syphons; the result was 205 sq ft of firebox area and 2,842.7 sq ft of EHS.

In an interesting variation on the usual notation, the diagrams close the record by saying that the engines in the class "were dismissed from service between 7-17-51 & 2-25-52."

Some information also provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005) describes one engine.


Class 156 / 500 / 950 (Locobase 2439)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/fmig28.htm . Data also 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.

Builder information from B Rumary list supplied by Allen Stanley in March 2004. Works numbers were 2127-2132 (July 1900). The KC, FS & M was absorbed by the St Louis-San Francisco in 1901. When the Frisco renumbered this class, it was to the 500 range first, then the 950 series. Some time later, the railroad reduced the tube counts by varying amounts to 280, 276, 268, and 266 tubes. The firebox heating surface includes 15.9 sq ft of arch tubes.

Retirements occurred in two widely separated waves. 950 and 954 were "dismissed from service" in March and April 1927, respectively. All of the others operated for another 12 years before 952 went in January 1939, 955 in February, and 951 and 953 in August.


Class 270 / 956 (Locobase 2440)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005). Data also 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. Works numbers ran from 26228 to 26237.

Most of the class saw their tube counts reduced from 302 2 1/4" tubes each to 292 2" tubes, sacrificing 338 sq ft of heating surface. This diminution in tube size may have been prompted by a desire for more effective water circulation in the boiler. On the other hand, arch tubes and other modifications increased firebox heating surface from 138 sq ft to 165.4 sq ft..

This was a long-lived class with the earliest retirement coming when 961 was "dismissed from service"in May 1946. The last locomotive (957) was retired in April 1950.


Class 2735 (Locobase 2453)

Interesting trio of refugees from the Pennsylvania Railroad. Not known when they got to the Frisco. The Class I Consolidation (later class H-1) constituted one of the largest classes on the Pennsylvania; see Locobase 1141. The data shown here differ slightly from the H-1 data, which could reflect minor differences in batches produced within the total of 545 locomotives in this class.

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm . (Note: the official name of the railroad was the St. Louis-San Francisco or St.L-SF)


Class 40 (Locobase 8551)

Data from SL&SF All Time Loco Diagrams HS Pub supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Vol 65, pp. 164+. Works numbers were 54265-54266 in January 1921.

These Baldwins were small, superheated Consolidations that arrived in Arkansas in early 1921. The notes to the diagrams indicated that the 77 had a brick arch and 12.2 more sq ft (1.1 sq m) of firebox heating surface, which suggests a single arch tube was part of the arch. The Frisco diagram shows a 368 sq ft (34.2 sq m) superheater area while Baldwin's spec shows 292. Given that the former shows a superheater percentage of 22%, which is high for this kind of locomotive, Locobase chose the latter value. Note, because the Moguls shown in Locobase 14380 ran into trouble with ash pans warping (probably because of too little clearance), the spec warned that the builder should "take measures to prevent this on this locomotive."

According to the current owner of the 76 -- the Ohio Central Railroad (http://www.ocsteam.com/76/index.html, accessed 7 July 2007) -- the Frisco leased the 76 in November 1925.

After World War II, both locomotives were sold to the Mississipian Railway (24-mile long short line also known as the Bentonite Line). 77 went first in March 1947 with 76 following in January 1948. There, the two 2-8-0s "...were kept in topnotch condition by a unique team of two brothers. In a return to a nearly-forgotten 19th Century railroad custom, each brother had his "own" engine. Jim Carlisle normally operated No. 76, while his brother Frank operated No. 77 Depending on whose locomotive was in service on any given day, one man was engineer and the other served as the conductor."

In 1967, 76 was bought by Sloan Cornell, who operated it on several museum roads such as the Penn View Mountain Railroad and Blairsville & Indiana Railroad and the Gettysburg Railroad. In 1999, the Ohio Central bought the 76 from Cornell.

77 moved on from the Mississippian in 1968 to the Muscle Shoals Railroad Club, which was renamed in 1980 as the North Alabama Railroad Club. This engine went on to the Magnolia State Railway in 1984, the Central Western Railway in 1989, and finally to the Alberta Prairie Railway Excursions, headquartered in Stettler, Alta, where it regained its original #41.


Class 60/259/724/2724 (Locobase 2451)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005). See also DeGolyer, Volume 13, p. 136. Works numbers were 8324-8328, 8339, 8345 in January 1887.

For their cylinder volume, these engines had good-sized boilers and grates.

After three renumberings, the class quickly diminished through dismantling in 1915-1916. 2728-2729 remained on the roster until the early 20s and were scrapped in December 1922.


Class 69/269/700/2700 (Locobase 6777)

Data from KCC&S 1884 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See the reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm . DeGolyer, Volume 11, p. 19. Works numbers were 5473 in January 1881; 5476, 5482 in February; 5820, 5831 in September; 5915 in November; 5983, 5987, 6022-6023 in January 1882; 6058, 6060 in February; 6076, 6078, 6092-6093 in March.

The first nine engines in this order were assigned road numbers in order of their works numbers. For some reason, the others did not and established a pattern that persisted over the next three renumberings, as the table shows:

266-274/700-709, 2700-2708. The 73 was named Jacob Rogers.

75/275/709/2709

77/277/711/2711

76/276/710/2710

79/279/713/2713

78/278/712/2712

81/281/715/2715

80/280/714/2714


Class 716 / 2716 (Locobase 2449)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005). Additional Data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.


Class 720 / 2720 (Locobase 2450)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005). Additional 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 1578-1581 in June 1884.

Works numbers from compilation of Cooke locomotives by B.Rumary (25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND) and supplied to Locobase by Allen Stanley in March 2004.

A look at 2448-2450 shows how the same specification could generate three slightly different engines. The Rogers engine had the most tubes and the most weight on the drivers.


Class 731 / 2731 (Locobase 2452)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005). Additional data from StLSF 1904 and SL&SF All Time Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.


Class 801 (Locobase 2433)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005). Also 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. JF Webber's list of Dickson locomotives (conveyed to Locobase by Allen Stanley in March 2004) gives the works numbers as 1156-1173 and road numbers as 501-518.

Most had their tube counts reduced to 240, which resulted in a total heating surface of 1,916.2 sq ft.

Except for 817 & 818, "dismissed from service" in May and April 1926, respectively, this class remained in service into the middle of the 1930s and 805-806 were let go in April 1945. 810 was sold to the Seneca Coal & Mining Company for the Alabama Central Railroad in November 1940.


Class 819 (Locobase 2434)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005). Data also 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. Pittsburgh produced these as a batch -- works #25311-25320 -- in January-February 1902 and Richmond followed with 25331-25335 in March 1902.

Like most of the other Frisco engines, this class saw a reduction in tube count in its boiler over the years. As it entered service, the design disposed 267 2 1/4" tubes and a firebox heating surface of 184 sq ft. The specifications above show that over time the Frisco reduced the tube count by 25 and the diameter of all tubes to 2". Moreover the firebox area shrank by 18 sq ft, possibly through elimination of the brick arch.

All but three were "dismissed from service" in the early to mid 30s. 827 went in February 1939, 821 in February 1941, and 819 in October 1946.


Class 834 (Locobase 2432)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm . Data also 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.

Produced as a pair (works #26512-26513) in January 1903, these engines saw only a modest reduction in tube area over their working lives. By the time they were "dismissed from service" in November 1936 and August 1939, respectively, they had 303 tubes and a total heating surface of 2,310.7 sq ft.


Class 850 (Locobase 2436)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005).. Data also 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.

This pair of light Consolidations (works #38033, 38049) had quite different lengths of service. 851 was "dismissed from service" at Springfield, Mo in May 1935 while 850 carried on until November 1946 before being retired at Joplin.


Class 860 (Locobase 2437)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm . Data also 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. Brooks produced the pair (works #1374 & 1379) in 1900.

These light Consolidations had relatively big boilers for the Frisco; 861 had two fewer tubes and 16 sq ft less total heating surface area.

860 was "dismissed from service" in September 1934 while 861 lasted until September 1939.


Class 970 (Locobase 2441)

Data provided by reprint of FMIG #28, a Frisco Lines newsletter, at http://www.frisco.org/fmig/newsletters/fmig28.htm (accessed 22 August 2005). Data also 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. Works numbers ran from 29623 in December 1906 to 29885 in January 1907.

As the Frisco modified the boilers in this class, they departed from usual practice. The shops still took out the 268 2 1/4" tubes originally installed, but they replaced them with 24 more 2" tubes. This meant that the total heating surface area dropped by only 55 sq ft from 2,444 sq ft.

Between April 1916 and December 1916, the Frisco sold 10 of this class to the New Orleans, Texas & Mexico as their road numbers 101-110. The engines were 971-975, 977-978, 982-983, 985.

All of the others, by now mostly oil burners, saw increases in their firebox heating suface. They remained in service until the late 1940s.

Specifications by Steve Llanso of Sweat House Media
Class120012261226 - superheated12661266 - superheated
Locobase ID2442 2444 8637 2445 2446
RailroadColorado Southern, New Orleans & Pacific (SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)
CountryUSAUSAUSAUSAUSA
Whyte2-8-02-8-02-8-02-8-02-8-0
Number in Class2640351513
Road Numbers1200-12251226-12651226-12651266-12801266-1305
GaugeStdStdStdStdStd
Number Built264015
BuilderBurnham, Williams & CoBurnham, Williams & CoFriscoBaldwinFrisco shops
Year19071907192219101922
Valve GearWalschaertWalschaertWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase16'16'16'17'17'
Engine Wheelbase24.33'24.33'24.33'26'26'
Ratio of driving wheelbase to overall engine wheebase 0.66 0.66 0.66 0.65 0.65
Overall Wheelbase (engine & tender)55.75'55.75'55.87'58.83'58.33'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers178000 lbs187000 lbs187000 lbs195050 lbs212500 lbs
Engine Weight198000 lbs207000 lbs207000 lbs215700 lbs237000 lbs
Tender Light Weight148400 lbs148400 lbs148400 lbs148400 lbs149700 lbs
Total Engine and Tender Weight346400 lbs355400 lbs355400 lbs364100 lbs386700 lbs
Tender Water Capacity5800 gals7500 gals7500 gals7500 gals7500 gals
Tender Fuel Capacity (oil/coal)12 tons12 tons12 tons12 tons12 tons
Minimum weight of rail (calculated)74 lb/yard78 lb/yard78 lb/yard81 lb/yard89 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter57"57"57"63"63"
Boiler Pressure200 psi200 psi200 psi200 psi190 psi
Cylinders (dia x stroke)22" x 30"22" x 30"22" x 30"23" x 30"26" x 30"
Tractive Effort43305 lbs43305 lbs43305 lbs42824 lbs51988 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.11 4.32 4.32 4.55 4.09
Heating Ability
Firebox Area163 sq. ft178 sq. ft221 sq. ft163 sq. ft200.60 sq. ft
Grate Area51 sq. ft51 sq. ft51 sq. ft50 sq. ft50 sq. ft
Evaporative Heating Surface3122 sq. ft3100 sq. ft2502 sq. ft2928 sq. ft2543 sq. ft
Superheating Surface529 sq. ft578 sq. ft
Combined Heating Surface3122 sq. ft3100 sq. ft3031 sq. ft2928 sq. ft3121 sq. ft
Evaporative Heating Surface/Cylinder Volume236.53234.87189.56202.96137.94
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation102001020010200100009500
Same as above plus superheater percentage1020010200119341000011305
Same as above but substitute firebox area for grate area3260035600517143260045356
Power L1566757441204654499467
Power MT280.75270.87568.06246.36392.87

Specifications by Steve Llanso of Sweat House Media
Class128112931306156 / 500 / 950270 / 956
Locobase ID2443 13674 2447 2439 2440
RailroadSt Louis-San Francisco (Frisco/(SLSF)Saint Louis-San Francisco (SLSF)St Louis-San Francisco (Frisco/(SLSF)Kansas City, Fort Scott & Memphis (SLSF)St Louis, Memphis & Southeastern (SLSF)
CountryUSAUSAUSAUSAUSA
Whyte2-8-02-8-02-8-02-8-02-8-0
Number in Class171344610
Road Numbers1281-12921293-13051306-1349156-161 / 500-05 / 950-55270-279 / 956-965
GaugeStdStdStdStdStd
Number Built1344610
BuilderAlco-BrooksBaldwinAlco-SchenectadyPittsburghDickson
Year19101910191219001902
Valve GearWalschaertWalschaertWalschaertStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase17'17'17'15.75'15.42'
Engine Wheelbase26'26'26'24.25'23.83'
Ratio of driving wheelbase to overall engine wheebase 0.65 0.65 0.65 0.65 0.65
Overall Wheelbase (engine & tender)58'58.83'61.95'54.09'55.17'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers201100 lbs180000 lbs226400 lbs154000 lbs155500 lbs
Engine Weight227200 lbs201000 lbs251200 lbs171000 lbs174500 lbs
Tender Light Weight149700 lbs155000 lbs162900 lbs105000 lbs143800 lbs
Total Engine and Tender Weight376900 lbs356000 lbs414100 lbs276000 lbs318300 lbs
Tender Water Capacity7500 gals7500 gals8100 gals5000 gals6000 gals
Tender Fuel Capacity (oil/coal)12 tons12 tons14 tons10 tons14 tons
Minimum weight of rail (calculated)84 lb/yard75 lb/yard94 lb/yard64 lb/yard65 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter63"63"63"55"57"
Boiler Pressure185 psi165 psi195 psi190 psi200 psi
Cylinders (dia x stroke)26" x 30"26" x 30"26" x 30"21" x 28"21" x 28"
Tractive Effort50620 lbs45147 lbs53356 lbs36258 lbs36827 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.97 3.99 4.24 4.25 4.22
Heating Ability
Firebox Area231.30 sq. ft212 sq. ft238.30 sq. ft191.90 sq. ft165.40 sq. ft
Grate Area50 sq. ft50 sq. ft50.30 sq. ft31.75 sq. ft44 sq. ft
Evaporative Heating Surface2541 sq. ft2884 sq. ft3055 sq. ft2448 sq. ft2382 sq. ft
Superheating Surface578 sq. ft525 sq. ft624 sq. ft
Combined Heating Surface3119 sq. ft3409 sq. ft3679 sq. ft2448 sq. ft2382 sq. ft
Evaporative Heating Surface/Cylinder Volume137.84156.44165.72218.09212.21
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation92508250980960338800
Same as above plus superheater percentage1100894881147660338800
Same as above but substitute firebox area for grate area5092140227543683646133080
Power L1937781471095452875432
Power MT411.19399.13426.67302.75308.05

Specifications by Steve Llanso of Sweat House Media
Class27354060/259/724/272469/269/700/2700716 / 2716
Locobase ID2453 8551 2451 6777 2449
RailroadSt Louis-San Francisco (Frisco/(SLSF)Jonesboro, Lake City & Eastern (SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)
CountryUSAUSAUSAUSAUSA
Whyte2-8-02-8-02-8-02-8-02-8-0
Number in Class327164
Road Numbers2735-273740-41 / 76-7760-65/259-265/724-730/2724-273066-75, 77, 76, 79, 78, 81, 802716-2719
GaugeStdStdStdStdStd
Number Built327164
BuilderAltoonaBaldwinBurnham, Parry, Williams & CoBurnham, Parry, Williams & CoRogers
Year18771920188718811881
Valve GearStephensonWalschaertStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase13.67'14'14'14.75'14.75'
Engine Wheelbase21.54'21.67'22.42'22.83'22.66'
Ratio of driving wheelbase to overall engine wheebase 0.63 0.65 0.62 0.65 0.65
Overall Wheelbase (engine & tender)46.62'52.12'46.20'46.37'47.35'
Axle Loading (Maximum Weight per Axle)25800 lbs
Weight on Drivers87000 lbs119000 lbs100200 lbs93100 lbs89500 lbs
Engine Weight102000 lbs135800 lbs141200 lbs108200 lbs104000 lbs
Tender Light Weight72300 lbs107800 lbs84500 lbs84600 lbs84500 lbs
Total Engine and Tender Weight174300 lbs243600 lbs225700 lbs192800 lbs188500 lbs
Tender Water Capacity3200 gals4500 gals4000 gals2800 gals4200 gals
Tender Fuel Capacity (oil/coal)8 tons10 tons8 tons tons8 tons
Minimum weight of rail (calculated)36 lb/yard50 lb/yard42 lb/yard39 lb/yard37 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter51"51"51"51"51"
Boiler Pressure135 psi200 psi155 psi135 psi135 psi
Cylinders (dia x stroke)20" x 24"19" x 24"20" x 24"20" x 24"20" x 24"
Tractive Effort21600 lbs28880 lbs24800 lbs21600 lbs21600 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.03 4.12 4.04 4.31 4.14
Heating Ability
Firebox Area106 sq. ft130.90 sq. ft145 sq. ft124.50 sq. ft137 sq. ft
Grate Area22 sq. ft27.50 sq. ft30.25 sq. ft27.60 sq. ft26.60 sq. ft
Evaporative Heating Surface1285 sq. ft1307 sq. ft1907 sq. ft1315 sq. ft1634 sq. ft
Superheating Surface292 sq. ft
Combined Heating Surface1285 sq. ft1599 sq. ft1907 sq. ft1315 sq. ft1634 sq. ft
Evaporative Heating Surface/Cylinder Volume147.25165.95218.53150.69187.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation29705500468937263591
Same as above plus superheater percentage29706490468937263591
Same as above but substitute firebox area for grate area1431030892224751680818495
Power L123879906397425483049
Power MT241.95734.08349.75241.35300.42

Specifications by Steve Llanso of Sweat House Media
Class720 / 2720731 / 2731801819834
Locobase ID2450 2452 2433 2434 2432
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-San Francisco (Frisco/(SLSF)
CountryUSAUSAUSAUSAUSA
Whyte2-8-02-8-02-8-02-8-02-8-0
Number in Class4418142
Road Numbers86-89 / 2720-27232731-2734501-518 / 801-818819-833834-835
GaugeStdStdStdStdStd
Number Built4418142
BuilderCookeRogersDicksonAlcoAlco-Brooks
Year18841884190019021903
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase15.08'14'16.50'15.42'16.50'
Engine Wheelbase22.75'22.25'23.42'23.42'22.92'
Ratio of driving wheelbase to overall engine wheebase 0.66 0.63 0.70 0.66 0.72
Overall Wheelbase (engine & tender)46.80'48.60'51.67'51.72'52.17'
Axle Loading (Maximum Weight per Axle)24500 lbs27000 lbs
Weight on Drivers85100 lbs104900 lbs142000 lbs145200 lbs145000 lbs
Engine Weight101000 lbs118300 lbs158000 lbs161300 lbs164000 lbs
Tender Light Weight84500 lbs84500 lbs113000 lbs111300 lbs125800 lbs
Total Engine and Tender Weight185500 lbs202800 lbs271000 lbs272600 lbs289800 lbs
Tender Water Capacity4000 gals4000 gals5000 gals5000 gals6200 gals
Tender Fuel Capacity (oil/coal)8 tons8 tons12 tons12 tons13 tons
Minimum weight of rail (calculated)35 lb/yard44 lb/yard59 lb/yard61 lb/yard60 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter51"51"57"57"51"
Boiler Pressure135 psi155 psi185 psi190 psi200 psi
Cylinders (dia x stroke)20" x 24"20" x 24"21" x 28"21" x 28"20" x 28"
Tractive Effort21600 lbs24800 lbs34065 lbs34986 lbs37333 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.94 4.23 4.17 4.15 3.88
Heating Ability
Firebox Area133 sq. ft141 sq. ft152 sq. ft166.10 sq. ft156.70 sq. ft
Grate Area27.95 sq. ft31.20 sq. ft31 sq. ft30.20 sq. ft51.60 sq. ft
Evaporative Heating Surface1441 sq. ft1847 sq. ft1990 sq. ft1940 sq. ft2376 sq. ft
Superheating Surface
Combined Heating Surface1441 sq. ft1847 sq. ft1990 sq. ft1940 sq. ft2376 sq. ft
Evaporative Heating Surface/Cylinder Volume165.13211.65177.29172.83233.37
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation377348365735573810320
Same as above plus superheater percentage377348365735573810320
Same as above but substitute firebox area for grate area1795521855281203155931340
Power L127693853430644555276
Power MT286.94323.90267.41270.57320.87

Specifications by Steve Llanso of Sweat House Media
Class850860970
Locobase ID2436 2437 2441
RailroadSt Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)St Louis-San Francisco (Frisco/(SLSF)
CountryUSAUSAUSA
Whyte2-8-02-8-02-8-0
Number in Class2220
Road Numbers850-851860-861970-989
GaugeStdStdStd
Number Built2220
BuilderAlco-BrooksBrooksBurnham, Williams & Co
Year190519001906
Valve GearStephensonStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase16'17.33'15.33'
Engine Wheelbase24.25'25.50'23.67'
Ratio of driving wheelbase to overall engine wheebase 0.66 0.68 0.65
Overall Wheelbase (engine & tender)47'58.10'54.75'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers154500 lbs166100 lbs160100 lbs
Engine Weight174500 lbs185500 lbs181500 lbs
Tender Light Weight110000 lbs136500 lbs128300 lbs
Total Engine and Tender Weight284500 lbs322000 lbs309800 lbs
Tender Water Capacity5000 gals4000 gals6000 gals
Tender Fuel Capacity (oil/coal)12 tons14 tons12 tons
Minimum weight of rail (calculated)64 lb/yard69 lb/yard67 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter57"63"55"
Boiler Pressure200 psi200 psi200 psi
Cylinders (dia x stroke)19.5" x 28"21" x 30"21" x 28"
Tractive Effort31754 lbs35700 lbs38167 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.87 4.65 4.19
Heating Ability
Firebox Area182 sq. ft209.20 sq. ft200 sq. ft
Grate Area44.20 sq. ft33.50 sq. ft47.90 sq. ft
Evaporative Heating Surface2396 sq. ft2897 sq. ft2416 sq. ft
Superheating Surface
Combined Heating Surface2396 sq. ft2897 sq. ft2416 sq. ft
Evaporative Heating Surface/Cylinder Volume247.56240.89215.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation884067009580
Same as above plus superheater percentage884067009580
Same as above but substitute firebox area for grate area364004184040000
Power L1649068855579
Power MT370.43365.53307.30

Reference


If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.