Philadelphia & Atlantic City 4-4-2 "Atlantic" Type Locomotives

The recently developed Atlantic wheel arrangement permitted larger fireboxes behind the drivers. When the railroad in question was burning anthracite, which needed even bigger grates, the result was the Camelback. Camelbacks separated the engine crew, putting the engineer high on the boiler and over the drivers and the fireman behind the huge Wooten firebox. This ACR engine was a Vauclain compound in which the high and low pressure cylinders shared a common valve gear.

The result was a Flier, posting speeds of 90+ mph and averaging 71 mph between Philadelphia and Atlantic City. On one run in August 1897, 1027 averaged 69.3 mph pulling a train that carried 448 passengers.

Specifications
Class
Locobase ID2562
RailroadPhiladelphia & Atlantic City
Whyte4-4-2
Road Numbers1027
GaugeStd
BuilderBurnham, Williams & Co
Year1896
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 7.25'
Engine Wheelbase26.59'
Ratio of driving wheelbase to overall engine wheebase 0.27
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)40000 lbs
Weight on Drivers79000 lbs
Engine Weight142900 lbs
Tender Light Weight84100 lbs
Total Engine and Tender Weight227000 lbs
Tender Water Capacity3300 gals
Tender Fuel Capacity (oil/coal)76 tons
Minimum weight per yard of rail on which locomotive could run66 lb rail
Geometry Relating to Tractive Effort
Driver Diameter84"
Boiler Pressure200 psi
Cylinders (dia x stroke)13" x 26"
Low Pressure Cylinders (dia x stroke)22" x 26"
Tractive Effort13182 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.99
Heating Ability
Firebox Area136.40 sq. ft
Grate Area76 sq. ft
Evaporative Heating Surface1836
Superheating Surface
Combined Heating Surface1836
Evaporative Heating Surface/Cylinder Volume459.66
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation15200
Same as above plus superheater percentage15200
Same as above but substitute firebox area for grate area27280
Power L16163
Power MT343.98

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.