Cotton Belt / St Louis, Arkansas & Texas / Deering & SouthWestern 4-4-0 "American" Type Locomotives

(Note: Official name for the Cotton Belt was St. Louis-Southwestern.)

Data from StL&SW 1 - 1932 Folio 725 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

The Cotton Belt website -- http://www.geocities.com/TheTropics/8199/c_belt.html#Deering%20Southwestern%20Railroad, accessed 29 May 2007 -- says the DSW "...originated at Caruthersville, Missouri (on the Mississippi, and extended almost due west to Deering, where it veered southwest to Hornersville and connected with the Cotton Belt." The section from the lumber mill at Deering to Hickory was completed in 1903, the remainder took the next 8 years.

Class A1 (Locobase 8200)

Data from St Louis-Southwestern diagram from p 55 of Cotton Belt Locomotives by Joseph Strapac, supplemented by data from StL&SW 1 - 1932 Folio 725 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Class B2 (Locobase 8431)

Data from St Louis-Southwestern diagram from p 50 of Cotton Belt Locomotives by Joseph Strapac. (Indiana University Press, 1999).

Strapac explains that these locomotives were originally delivered to operate on the 6-foot gauge of the Erie system. Some were built by the New Jersey-based Atlantic & Great Western itself, others by Rogers. In 1879, the New York, Pennsylvania & Ohio reduced the gauge to standard and modified the locomotives accordingly. When the Saint Louis-Southwestern converted from 3' gauge to standard in 1886, the Erie made 25 of these locomotives available for a pittance.

As it turned out, the clapped-out Eries weren't worth much more than that and the StL-SW undertook a rebuild:"...the bell was jacked up and a new locomotive slid underneath; virtually nothing was left that could be called original. In fact, three were converted to cross-compounds."

The dozen locomotives rebuilt in 1894-1899 proved useful branchline engines for another 3 decades. Two were scrapped in 1909, while the rest left in the late 1920s. Five were scrapped in 1927, 1 in 1928, 1 in 1929, and the last in 1933.

Class C2 (Locobase 8462)

(Note: Official name for the Cotton Belt was St. Louis-Southwestern.)

Data from StL&SW 1 - 1932 Folio 725 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

The first 7 of these Eight-wheelers came from Rogers' Paterson, NY works in 1900. Pittsburgh added 4 more in May 1901 (works #2253-2257), and Rogers, now formally part of the Alco combine, supplied the remainder in 1903. Most used Stephenson link motion for the slide valves, but at least 3 were retrofitted with Walschaert gear.

One of the class -- #40 -- later substituted one thermic syphon for the 15 sq ft of arch tubes in the original firebox. The subtraction and addition netted 18 sq ft in the firebox, but only 7 sq ft overall, so the tradeoff may have been seen as not worth the effort.

The class was retired over a long period, 17 years being required to withdraw all 18 engines.

Class D1 (Locobase 8463)

(Note: Official name for the Cotton Belt was St. Louis-Southwestern.)

Data from StL&SW 1 - 1932 Folio 725 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Entering service 3 years after the Alco bunch (Locobase 8463), this set of Baldwins were larger and had longer boilers (although fewer tubes). They also were coal-fired.

Specifications
ClassA1B2C2D1
Locobase ID84608200843184628463
RailroadDeering & SouthWestern (StLSW)St Louis, Arkansas & Texas (StLSW)Cotton Belt (StLSW)Cotton Belt (StLSW)Cotton Belt (StLSW)
Whyte4-4-04-4-04-4-04-4-04-4-0
Road Numbers9110148-16840-5758-62
GaugeStdStdStdStdStd
BuilderDicksonPine BluffAlcoBurnham, Williams & Co
Year1886189419001906
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase 8.67'8'8' 7.50' 8.50'
Engine Wheelbase22.67'22'22'22'23.75'
Ratio of driving wheelbase to overall engine wheebase 0.38 0.36 0.36 0.34 0.36
Overall Wheelbase (engine & tender)45.17'53.54'52.73'53.17'
Axle Loading (Maximum Weight per Axle)31400 lbs46500 lbs50500 lbs
Weight on Drivers62800 lbs57400 lbs69000 lbs93000 lbs101000 lbs
Engine Weight101800 lbs91000 lbs108000 lbs138000 lbs156000 lbs
Tender Light Weight88500 lbs83700 lbs94800 lbs140000 lbs142000 lbs
Total Engine and Tender Weight190300 lbs174700 lbs202800 lbs278000 lbs298000 lbs
Tender Water Capacity4500 gals3200 gals4000 gals6000 gals6000 gals
Tender Fuel Capacity (oil/coal)8 tons10 tons10 tons2900 gals14 tons
Minimum weight per yard of rail on which locomotive could run52 lb rail48 lb rail58 lb rail78 lb rail84 lb rail
Geometry Relating to Tractive Effort
Driver Diameter63"63"67"69"69"
Boiler Pressure150 psi115 psi160 psi200 psi200 psi
Cylinders (dia x stroke)17" x 24"16" x 24"17" x 24"18" x 26"19" x 26"
Tractive Effort14037 lbs9533 lbs14079 lbs20755 lbs23125 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.47 6.02 4.90 4.48 4.37
Heating Ability
Firebox Area127.50 sq. ft107.50 sq. ft120 sq. ft184 sq. ft184 sq. ft
Grate Area16.34 sq. ft15.60 sq. ft15.10 sq. ft24.90 sq. ft28.90 sq. ft
Evaporative Heating Surface13311050126417781881
Superheating Surface
Combined Heating Surface13311050126417781881
Evaporative Heating Surface/Cylinder Volume211.10188.00200.48232.19220.46
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation24511794241649805780
Same as above plus superheater percentage24511794241649805780
Same as above but substitute firebox area for grate area1912512363192003680036800
Power L149173432528281047551
Power MT345.23263.63337.53384.22329.65

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.