Atlantic Coast Line 4-4-2 "Atlantic" Type Locomotives

Class I (Locobase 1113)

First true Atlantic built for US service. Although other 4-4-2s had appeared earlier, this design included the larger firebox that was the rationale for the extra trailing truck.

According to the ACL's 1913 Locomotive Diagram supplied by Allen Stanley in May 2005 from his extensive collection, there were several subclasses. By 1913, the book only showed 8 locomotives. The 1942 edition shows a slightly larger firebox with 14 sq ft of fire brick tubes. It also notes that Baldwin delivered locomotives in 1894-95 and in 1896-1897.

Specifications
ClassI
Locobase ID1113
RailroadAtlantic Coast Line (ACL)
Whyte4-4-2
Road Numbers151
GaugeStd
BuilderBurnham, Williams & Co
Year1894
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 6.25'
Engine Wheelbase23.83'
Ratio of driving wheelbase to overall engine wheebase 0.26
Overall Wheelbase (engine & tender)50.33'
Axle Loading (Maximum Weight per Axle)40750 lbs
Weight on Drivers75990 lbs
Engine Weight129620 lbs
Tender Light Weight82800 lbs
Total Engine and Tender Weight212420 lbs
Tender Water Capacity2600 gals
Tender Fuel Capacity (oil/coal)
Minimum weight per yard of rail on which locomotive could run63 lb rail
Geometry Relating to Tractive Effort
Driver Diameter72"
Boiler Pressure180 psi
Cylinders (dia x stroke)19" x 24"
Tractive Effort18411 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.13
Heating Ability
Firebox Area161 sq. ft
Grate Area26.10 sq. ft
Evaporative Heating Surface2086
Superheating Surface
Combined Heating Surface2086
Evaporative Heating Surface/Cylinder Volume264.86
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4698
Same as above plus superheater percentage4698
Same as above but substitute firebox area for grate area28980
Power L17929
Power MT460.07

Reference

Credits

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