Arkansas, Louisiana & Southern 4-4-0 "American" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 12322)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 21, p.253. Works number was 16436 in January 1899.


Class 3/100 (Locobase 6129)

Data from DeGolyer, Volume 22, p. 36. See also 1918 USRA diagram book of L&A locomotives supplied by Allen Stanley in March 2004. Works number was 16436 in January 1899.

It's hard to believe this was a standard-gauge locomotive on American rails at the turn of the century. It was one of the lightest and least powerful eight-wheelers of the time. Or, to note another comparison, the famous Civil War locomotive General, built in 1855, had almost identical dimensions. The improbably low factor of adhesion can't be contradicted either by the Baldwin entry or the later USRA diagram.

The USRA diagram showed cylinder diameters of 14 3/4" (375 mm) and driver diameters of 57" (1,448 mm). A larger tender carried 3,600 US gallons (13,640 litres) of water and 8 tons (7.3 tonnes) of coal; its loaded weight was listed as 82,700 lb (37,512 kg).

The 100 was scrapped in January 1926.

Specifications by Steve Llanso of Sweat House Media
Class33/100
Locobase ID12322 6129
RailroadArkansas, Louisiana & SouthernArkansas, Louisiana & Southern
CountryUSAUSA
Whyte4-4-04-4-0
Number in Class11
Road Numbers3 / 1003/100
GaugeStdStd
Number Built11
BuilderBurnham, Williams & CoBurnham, Williams & Co
Year18991899
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase 7.33' 7.33'
Engine Wheelbase20.96'21'
Ratio of driving wheelbase to overall engine wheebase 0.35 0.35
Overall Wheelbase (engine & tender)44.83'
Axle Loading (Maximum Weight per Axle)19000 lbs
Weight on Drivers39000 lbs38000 lbs
Engine Weight61000 lbs60000 lbs
Tender Light Weight50000 lbs
Total Engine and Tender Weight110000 lbs
Tender Water Capacity2500 gals2500 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)33 lb/yard32 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter54"54"
Boiler Pressure180 psi180 psi
Cylinders (dia x stroke)14" x 22"14" x 22"
Tractive Effort12217 lbs12217 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.19 3.11
Heating Ability
Firebox Area79 sq. ft79 sq. ft
Grate Area12.80 sq. ft12.80 sq. ft
Evaporative Heating Surface799 sq. ft799 sq. ft
Superheating Surface
Combined Heating Surface799 sq. ft799 sq. ft
Evaporative Heating Surface/Cylinder Volume203.84203.84
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation23042304
Same as above plus superheater percentage23042304
Same as above but substitute firebox area for grate area1422014220
Power L149354935
Power MT557.94572.62


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