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 ID11,686
RailroadAnnapolis, Washington & Baltimore
Number in Class1
Road Numbers2
Number Built1
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 8.25
Engine Wheelbase (ft)22.17
Ratio of driving wheelbase to overall engine wheebase 0.37
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)75,000
Engine Weight (lbs)90,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)
Tender Water Capacity (gals)2700
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)63
Geometry Relating to Tractive Effort
Driver Diameter (in)62
Boiler Pressure (psi)130
High Pressure Cylinders (dia x stroke) (in)17" x 24"
Tractive Effort (lbs)12,362
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.07
Heating Ability
Firebox Area (sq ft)112
Grate Area (sq ft)16.40
Evaporative Heating Surface (sq ft)1186
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1186
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 area14,560
Power L13720
Power MT218.70