Baltimore & Annapolis Short Line 4-4-0 "American" Locomotives of 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.

Specifications 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) 8.50
Engine Wheelbase (ft)22.58
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)63,000
Engine Weight (lbs)98,000
Tender Loaded Weight (lbs)62,000
Total Engine and Tender Weight (lbs)160,000
Tender Water Capacity (gals)3000
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)53
Geometry Relating to Tractive Effort
Driver Diameter (in)62
Boiler Pressure (psi)130
High Pressure Cylinders (dia x stroke) (in)18" x 24"
Tractive Effort (lbs)13,859
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.55
Heating Ability
Firebox Area (sq ft)128
Grate Area (sq ft)17.80
Evaporative Heating Surface (sq ft)1332
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1332
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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