Annapolis, Washington & Baltimore 4-4-0 "American" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 2 (Locobase 11686)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 14, p. 259.

Works number was 9772 in January 1889.

The firebox heating surface was approximately 112 sq ft. When the AW & B electrified in 1908, this Eight-wheeler was sold to D W Alderman & Sons.

Specifications by Steve Llanso of Sweat House Media
Locobase ID11686
RailroadAnnapolis, Washington & Baltimore
Number in Class1
Road Numbers2
Number Built1
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 8.25'
Engine Wheelbase22.17'
Ratio of driving wheelbase to overall engine wheebase 0.37
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers75000 lbs
Engine Weight90000 lbs
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity2700 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)63 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter62"
Boiler Pressure130 psi
Cylinders (dia x stroke)17" x 24"
Tractive Effort12362 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.07
Heating Ability
Firebox Area112 sq. ft
Grate Area16.40 sq. ft
Evaporative Heating Surface1186 sq. ft
Superheating Surface
Combined Heating Surface1186 sq. ft
Evaporative Heating Surface/Cylinder Volume188.10
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2132
Same as above plus superheater percentage2132
Same as above but substitute firebox area for grate area14560
Power L13720
Power MT218.70

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