Railway Auto Car Company 2-2-4 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 14062)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 45, p. 142. Works number was 33417 in May 1909.

See Locobase 13135 for a full description of a slightly earlier auto car. The Baldwin specs give details about the expectation for this coal-burner. A Mr Romer furnished the plans from which Baldwin was to "furnish mechanical parts for 200 HP type railway auto car comprising the boiler, superheater and all controlling parts and connections."

Its fuel consumption of either anthracite or bituminous coal was not exceed 30 pounds per mile (8.45 kg/km). Speeds of up to 50 mph (81 km/h) on the level were called for unless the auto car was pulling a 60,000-lb (27,216-kg) trailer in which case top speed dropped to 40 mph (64 km/h). Without the trailer, the autocar was to scale a 2 1/2% grade at 15 mph (24 km/h).

Specifications by Steve Llanso of Sweat House Media
Locobase ID14062
RailroadRailway Auto Car Company
Number in Class1
Road Numbers
Number Built1
BuilderBurnham, Williams & Co
Valve GearHackworth
Locomotive Length and Weight
Driver Wheelbase
Engine Wheelbase40.58'
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender)40.58'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers60000 lbs
Engine Weight100000 lbs
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity1000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)100 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter36"
Boiler Pressure160 psi
Cylinders (dia x stroke)12" x 12"
Tractive Effort6528 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 9.19
Heating Ability
Firebox Area60.60 sq. ft
Grate Area14 sq. ft
Evaporative Heating Surface697 sq. ft
Superheating Surface130 sq. ft
Combined Heating Surface827 sq. ft
Evaporative Heating Surface/Cylinder Volume443.72
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2240
Same as above plus superheater percentage2598
Same as above but substitute firebox area for grate area11247
Power L113262
Power MT487.29

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