Santa Fe 2-6-2 "Prairie" Locomotives

Class Details by Steve Llanso of Sweat House Media

Class 1000 (Locobase 4125)

See Railroad Gazette 22 November 1901. Data supplemented and corrected by AT&SF 7 -1901 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 24, p. 107. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (also visited 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema .

Works numbers were 19578-19584, 19627-19634, 19642-19647 in October 1901; 19681-19684, 19721-19726, 19737-19740, 19764-19765, 19770 in November; and 19811-19812 in December.

This big Prairie Vauclain compound design was designed for the La Junta-Albuquerque section, which had steep ascents between Trinidad and Raton in both directions (more than 3%). Baldwin's design offered a very big, long boiler and grate, such that the engine shouldn't ever have been short of steam.

They came in two batches. 1000-1013 and 1014-1039.

Three were fitted with a Jacobs Shupert firebox; see Locobase 8257.

Werkema says that the later batch was simpled in 1912-1918 and the earlier group in 1922-1924. Drury (1993) says that part of the modification included fitting 69" drivers in 1922-1923.

The catalogue notes that another 103 Prairies were built for fast freight service and fitted with 69" drivers; see Locobase 8229.

Retirements began in 1941, with the last one leaving service in 1954. Another 129 Vauclain compounds and 88 balanced compounds arrived over the next two years. The AT&SF soon settled on 69" drivers for the type and later converted all those left in service to simple expansion.


Class 1001 (Locobase 8257)

Data supplemented and corrected by AT&SF 7 -1901 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (also visited 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema . Works numbers were 19578-19579, 19630 in October 1901.

Among the first Prairies purchased by the Santa Fe (see Locobase 4125) were three fitted with the stayless Jacobs Shupert firebox; see Locobase 463 for a description of this firebox design. This experiment in lower maintenance was not a long-term success, although the engines were still so equipped in 1920.


Class 1014/1050 - simpled (Locobase 8258)

Data from AT&SF 9 -1920 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (accessed 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema.

Although many US railroads converted their compound locomotives to simple-expansion layouts, few accompanied that change with a 10" decrease in driver diameter as in the case of the 1014-1039 batch of locomotive shown in 4125.

The result was a pretty hearty passenger locomotive that operated on many Santa Fe lines for decades. The design might have been a bit slippery, but few would cavil with the available power. The last of these was retired in 1956 and a least a dozen were preserved.


Class 1050 (Locobase 8229)

Data from AT&SF 7 -1901 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 24, p. 235. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (also visited 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema .

Works numbers were

1902

20132-20139 in February;

20179-20182 in March;

20263-20268, 20287-20291, 20333-20338, 20375-20380 in April;

20408, 20417, 20427-20428 in May;

20541-20546, 20563, 20579, 20592-20593, 20616-20619, 20629-20632 in June;

20690-20693, 20721, 20732-20735 in July;

20787-20793, 20841-20842 in August;

21276-21277, 21297, 21305-21307 in November;

21361, 21401-21402, 21416

1903

21434-21435. 21491, 21497, 21506, 21521, 21534, 21561 in January;

February 21616-21617, 21644, 21661-21662, 21674, 21707-21708

March 21773, 21822

Locobase 4125 shows the express-passenger variant of this 4-cylinder Vauclain compound Prairie design. In the present entry, the only difference is the diameter of the drivers. Of course, 69" drivers could still run, but they meant that the class was intended for a variety of services. Of the class, #1051 and 1125 supplied engine sets for a home-built 2-6-6-2 (1157).

Simpling the class began in 1912 and continued until 1924 (see Locobase 8258), after which they served for decades.


Class 1800 (Locobase 5387)

Data from table in the June 1907 AERJ. See also "Some Interesting Types in 'Development of Four Cylinder Compound Locomotives", Railway Master Mechanic, Vol XXX, #12 (December 1906), pp. 482-486 for extensive coverage and schematics. works numbers were:

1906

August 28746-28748;

October: 28852, 29216-29219, 29259-29260, 29281, 29288-29289, 29336-29337, 29356

November 29384-29385, 29395, 29425, 29434, 29453, 29520-29522, 29552-29553, 29594-29595, 29620

December 29665, 29672-29673, 29711, 29783-29787, 29824-29825, 29890-29892

1907

January 29983, 30013, 30031-30033

February 30073-30074, 30085, 30127, 30158, 30180, 30266

March 30354

This set of balanced compounds capped AT&SF Prairie development. This version of the basic Baldwin design raked the inside HP cylinders to 7 degrees off the horizontal to clear the front axle and avoid the use of a forked main rod. They were also among the biggest 2-6-2s built for any railroad. Drury (1993) describes them as "mainline freight power", an unusual role for the wheel arrangement.

In the 1920s, this class was converted to simple expansion and were soon relegated to branch-line, mixed-traffic and local freight service. Retirements in 1940 and continued until 1955.


Class 1800 - superheated (Locobase 8277)

Data from AT&SF 9 -1920 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (accessed 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema.

In the 1920s, this class was converted to simple expansion and were soon relegated to branch-line, mixed-traffic and local freight service. Retirements in 1940 and continued until 1955.


Class 1800/1857 - simpled (Locobase 6322)

Data from Santa Fe Locomotive Diagram archived at the Kansas Historical Foundation's Kansas Memories Digital Archives, specifically page 152-- http://www.kansasmemory.org/item/221763/page/152 , last accessed 12 December 2014. See also Interstate Commerce Commission, Locomotive Boiler Explosion, Canadian, Texas, 1951, Report #3396 at http://www.discity.com/explosions/boiler/atsfrrtex/ , Google cache last accessed 14 September 2011.

When locomotive 1805 suffered a boiler explosion in Canadian, Tex on 1 April 1951, the inspection report that followed contained data on the simpled version of the 1800 and 1857-class Prairies (Locobases 5387 and 13151)). The class burned either coal or oil; the specs represent the oil burners. Coal burning engines put more weight on the drivers (194,100 lb), although it was more evenly distributed than the oil-burners' loadings shown above. The engine's overall weight was higher as well (279,000 lb). Firebox heating surface area for either version included 29 sq ft (2.7 sq m) in four arch tubes.

The new cylinder arrangement delivered a healthy amount of power, although in later years (if 1805's 1951 setting was typical) the pressure was reduced to 200 psi.


Class 1855 - Jacobs-Shupert (Locobase 8276)

Data from AT&SF 9 -1920 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (accessed 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema. Works numbers were 30266 in February, 31106 in June, and 31210 in July.

The last 32 of the 1800 class (Locobase 5357) had 18" x 28" HP, 30" x 28" LP cylinders. Three of the 1800 class had stayless Jacobs Shupert fireboxes and that data is shown in the current entry (see Locobase 463 for a description of this firebox design). The class was simpled in 1926-1929.


Class 1857 (Locobase 13151)

Data from AT&SF 9 - 1920 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 30, pp. 52+. Works numbers were

1907

June 31106-31107, 31147-31148, 31171

July 31204, 31208-31210, 31257-31258, 31281-31284, 31323-31324, 31395-31397, 31434

August 31458-31459, 31460, 31499-31501, 31523-31524, 31545, 31596

The Santa Fe and Baldwin tweaked the balanced compound design first produced in 1906 (Locobase 5387) by increasing cylinder volume. The other design elements remained essentially unchanged including raking the inside HP cylinders to 7 degrees off the horizontal to clear the front axle and avoid the use of a forked main rod.

Baldwin estimated the compound tractive effort at 40,265 lb (18,264 kg).


Class 1857 - superheated (Locobase 8278)

Data from AT&SF 9 -1920 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (accessed 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema.

Other than retaining the larger cylinder volume of the original 1907 balanced-compound Prairies, these engines were very similar to the superheated upgrade (Locobase 8277) of the slightly earlier 1800s.

In the 1920s, this class was converted to simple expansion and were soon relegated to branch-line, mixed-traffic and local freight service.

Retirements began in 1940 and continued until 1955.


Class 564 (Locobase 8228)

Data from AT&SF 7 -1901 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Information about how many, when, and by whom this class was supplied from http://atsf.railfan.net/atsfstea.html (also visited 6 Feb 2006), the Santa Fe All-Time Steam Roster maintained by Evan Werkema . Works numbers were 25338-25339 in January 1902.

In Locobase 4125, we describe the 79" express passenger version of this prolifically supplied Vauclain-compound Prairie design. Although the 1902 description of locomotives shows the 17" cylinders found on the 1000 class, the 1901 diagram shows 16" in large numbers.

Like all of the compound engines, this pair was converted to a simple-expansion layout (the two undertaken in 1918).

Specifications by Steve Llanso of Sweat House Media
Class 1000 1001 1014/1050 - simpled 1050 1800
Locobase ID 4125 8257 8258 8229 5387
Railroad Santa Fe (ATSF) Santa Fe (ATSF) Santa Fe (ATSF) Santa Fe (ATSF) Santa Fe (ATSF)
Country USA USA USA USA USA
Whyte 2-6-2 2-6-2 2-6-2 2-6-2 2-6-2
Road Numbers 1000-1039 1001, 1002, 1010 1014-1152 1050-1152 1800-1856
Gauge Std Std Std Std Std
Builder Burnham, Williams & Co Burnham, Williams & Co Santa Fe Burnham, Williams & Co Burnham, Williams & Co
Year 1901 1901 1912 1902 1903
Valve Gear Stephenson Stephenson Walschaert Stephenson Walschaert
Locomotive Length and Weight
Driver Wheelbase 13.67' 13.67' 13.67' 13.67' 13.67'
Engine Wheelbase 32.17' 32.17' 32.17' 32.17' 33.75'
Ratio of driving wheelbase to overall engine wheebase 0.42 0.42 0.42 0.42 0.41
Overall Wheelbase (engine & tender) 69.48' 70.48' 61.90' 69.59' 65'
Axle Loading (Maximum Weight per Axle) 51530 lbs 51530 lbs 50180 lbs
Weight on Drivers 144610 lbs 144810 lbs 141690 lbs 135000 lbs 174700 lbs
Engine Weight 209220 lbs 209220 lbs 210190 lbs 190000 lbs 248200 lbs
Tender Light Weight 118000 lbs 118000 lbs 112610 lbs 110790 lbs 175000 lbs
Total Engine and Tender Weight 327220 lbs 327220 lbs 322800 lbs 300790 lbs 423200 lbs
Tender Water Capacity 6000 gals 6000 gals 7000 gals 6000 gals 9000 gals
Tender Fuel Capacity (oil/coal) 10 tons 10 tons 10 tons 10 tons 14 tons
Minimum weight of rail (calculated) 80 lb/yard 80 lb/yard 79 lb/yard 75 lb/yard 97 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter 79" 79" 69" 69" 69"
Boiler Pressure 200 psi 220 psi 200 psi 200 psi 225 psi
High Pressure Cylinders (dia x stroke) 17" x 28" 17" x 28" 23.5" x 28" 17" x 28" 17.5" x 28"
Low Pressure Cylinders (dia x stroke) 28" x 28" (2) 28" x 28" (2) 28" x 28" (2) 29" x 28" (2)
Tractive Effort 25446 lbs 27991 lbs 38097 lbs 29134 lbs 34846 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.68 5.17 3.72 4.63 5.01
Heating Ability
Firebox Area 195 sq. ft 195 sq. ft 195 sq. ft 195 sq. ft 217 sq. ft
Grate Area 53.50 sq. ft 51.70 sq. ft 53.50 sq. ft 53.50 sq. ft 53.80 sq. ft
Evaporative Heating Surface 3738 sq. ft 3179 sq. ft 3738 sq. ft 3738 sq. ft 4020 sq. ft
Superheating Surface
Combined Heating Surface 3738 sq. ft 3179 sq. ft 3738 sq. ft 3738 sq. ft 4020 sq. ft
Evaporative Heating Surface/Cylinder Volume 508.17 432.17 265.93 508.17 515.72
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation 10700 11374 10700 10700 12105
Same as above plus superheater percentage 10700 11374 10700 10700 12105
Same as above but substitute firebox area for grate area 39000 42900 39000 39000 48825
Power L1 6219 6030 7712 5432 6171
Power MT 284.43 275.41 359.98 266.12 233.62

Specifications by Steve Llanso of Sweat House Media
Class 1800 - superheated 1800/1857 - simpled 1855 - Jacobs-Shupert 1857 1857 - superheated
Locobase ID 8277 6322 8276 13151 8278
Railroad Santa Fe (ATSF) Santa Fe (ATSF) Santa Fe (ATSF) Santa Fe (ATSF) Santa Fe (ATSF)
Country USA USA USA USA USA
Whyte 2-6-2 2-6-2 2-6-2 2-6-2 2-6-2
Road Numbers 1800-1856 1800-1887 1855, 1857, 1865 1857-1887 1857-1887
Gauge Std Std Std Std Std
Builder Santa Fe ATSF Burnham, Williams & Co Burnham, Williams & Co Santa Fe
Year 1920 1924 1906 1907 1920
Valve Gear Walschaert Walschaert Walschaert Walschaert Walschaert
Locomotive Length and Weight
Driver Wheelbase 13.67' 13.67' 13.67' 13.67' 13.67'
Engine Wheelbase 33.75' 33.75' 33.75' 33.75' 33.75'
Ratio of driving wheelbase to overall engine wheebase 0.41 0.41 0.41 0.41 0.41
Overall Wheelbase (engine & tender) 65' 61.83' 65' 61.81' 65'
Axle Loading (Maximum Weight per Axle) 63303 lbs 65100 lbs 63303 lbs
Weight on Drivers 179006 lbs 192100 lbs 174700 lbs 174700 lbs 179006 lbs
Engine Weight 260132 lbs 272400 lbs 248200 lbs 248200 lbs 260132 lbs
Tender Light Weight 164500 lbs 164500 lbs 164500 lbs 164500 lbs 164500 lbs
Total Engine and Tender Weight 424632 lbs 436900 lbs 412700 lbs 412700 lbs 424632 lbs
Tender Water Capacity 8500 gals 12000 gals 8500 gals 8500 gals 8500 gals
Tender Fuel Capacity (oil/coal) 12 tons 3909 gals 12 tons 12 tons 12 tons
Minimum weight of rail (calculated) 99 lb/yard 107 lb/yard 97 lb/yard 97 lb/yard 99 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter 69" 70" 69" 69" 69"
Boiler Pressure 225 psi 200 psi 225 psi 225 psi 225 psi
High Pressure Cylinders (dia x stroke) 17.5" x 28" 25" x 28" 18" x 30" 18" x 28" 18" x 28"
Low Pressure Cylinders (dia x stroke) 29" x 28" (2) 30" x 28" (2) 30" x 28" (2) 30" x 28" (2)
Tractive Effort 34846 lbs 42500 lbs 38884 lbs 36978 lbs 36978 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.14 4.52 4.49 4.72 4.84
Heating Ability
Firebox Area 246 sq. ft 246 sq. ft 231 sq. ft 207.30 sq. ft 246 sq. ft
Grate Area 53.70 sq. ft 53.70 sq. ft 59.50 sq. ft 53.50 sq. ft 53.70 sq. ft
Evaporative Heating Surface 3282 sq. ft 3398 sq. ft 4606 sq. ft 4018 sq. ft 3282 sq. ft
Superheating Surface 802 sq. ft 834 sq. ft 802 sq. ft
Combined Heating Surface 4084 sq. ft 4232 sq. ft 4606 sq. ft 4018 sq. ft 4084 sq. ft
Evaporative Heating Surface/Cylinder Volume 421.04 213.60 521.29 487.23 397.98
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation 12083 10740 13388 12038 12083
Same as above plus superheater percentage 14499 12888 13388 12038 14499
Same as above but substitute firebox area for grate area 66420 59040 51975 46643 66420
Power L1 14179 17798 6507 5709 13250
Power MT 523.88 612.77 246.34 216.13 489.56

Specifications by Steve Llanso of Sweat House Media
Class 564
Locobase ID 8228
Railroad Santa Fe (ATSF)
Country USA
Whyte 2-6-2
Road Numbers 564-565
Gauge Std
Builder Alco-Schenectady
Year 1902
Valve Gear Stephenson
Locomotive Length and Weight
Driver Wheelbase 13'
Engine Wheelbase 29.54'
Ratio of driving wheelbase to overall engine wheebase 0.44
Overall Wheelbase (engine & tender) 58'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers 134500 lbs
Engine Weight 211000 lbs
Tender Light Weight 122700 lbs
Total Engine and Tender Weight 333700 lbs
Tender Water Capacity 6000 gals
Tender Fuel Capacity (oil/coal) 10 tons
Minimum weight of rail (calculated) 75 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter 63"
Boiler Pressure 210 psi
High Pressure Cylinders (dia x stroke) 16" x 28"
Low Pressure Cylinders (dia x stroke) 28" x 28" (2)
Tractive Effort 30620 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.39
Heating Ability
Firebox Area 219 sq. ft
Grate Area 51.25 sq. ft
Evaporative Heating Surface 3666 sq. ft
Superheating Surface
Combined Heating Surface 3666 sq. ft
Evaporative Heating Surface/Cylinder Volume 562.62
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation 10763
Same as above plus superheater percentage 10763
Same as above but substitute firebox area for grate area 45990
Power L1 5261
Power MT 258.70

Photos

Reference


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