Baltimore & Annapolis Short Line 4-4-0 "American" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 9 (Locobase 12601)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 24, p. 194. Works number was 20159 in February 1902.

The B & A Short Line didn't prosper during its steam era, the fault for which cannot be laid at the drivers of this small, but unremarkable Eight-wheeler. After electrification, the B & A operated for decades as an interurban. After buses took over passenger traffic in 19050, the B & A continued to run freight trains. Eventually the line was absorbed by the Maryland Transit Administration.

Part of the right-of-way regained its purpose in the 1990s and beyond when the Baltimore light-rail line system ran trains down to Glen Burnie.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID12,601
RailroadBaltimore & Annapolis Short Line
Number in Class1
Road Numbers9
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.50 / 2.59
Engine Wheelbase (ft / m)22.58 / 6.88
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)63,000 / 28,576
Engine Weight (lbs / kg)98,000 / 44,452
Tender Loaded Weight (lbs / kg)62,000 / 28,123
Total Engine and Tender Weight (lbs / kg)160,000 / 72,575
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)53 / 26.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)62 / 1575
Boiler Pressure (psi / kPa)130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x610
Tractive Effort (lbs / kg)13,859 / 6286.34
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.55
Heating Ability
Firebox Area (sq ft / m2)128 / 11.90
Grate Area (sq ft / m2)17.80 / 1.65
Evaporative Heating Surface (sq ft / m2)1332 / 123.79
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1332 / 123.79
Evaporative Heating Surface/Cylinder Volume188.44
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2314
Same as above plus superheater percentage2314
Same as above but substitute firebox area for grate area16,640
Power L13748
Power MT262.31

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Wes Barris