Florida East Coast 4-4-2 "Atlantic" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 45 (Locobase 6673)

Data from FEC 1926 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

These low-drivered Atlantics are an odd breed -- the builder doesn't seem to have exploited the addition of a trailing axle to enlarge the grate or firebox area by much.

Builders numbers were 28412-28421, 31240-31244, and 39047-39051 on locomotives that were delivered in 1904-1905. The class was disposed of between 1923-1930.

Specifications by Steve Llanso of Sweat House Media
Locobase ID6673
RailroadFlorida East Coast
Number in Class20
Road Numbers45-64
Number Built20
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)7
Engine Wheelbase (ft)25.92
Ratio of driving wheelbase to overall engine wheebase 0.27
Overall Wheelbase (engine & tender) (ft)50.23
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)81,000
Engine Weight (lbs)151,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)
Tender Water Capacity (gals)5000
Tender Fuel Capacity (oil/coal) (gals/tons)2400
Minimum weight of rail (calculated) (lb/yd)68
Geometry Relating to Tractive Effort
Driver Diameter (in)70
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)19" x 26"
Tractive Effort (lbs)20,515
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.95
Heating Ability
Firebox Area (sq ft)134.80
Grate Area (sq ft)37.73
Evaporative Heating Surface (sq ft)2285
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)2285
Evaporative Heating Surface/Cylinder Volume267.81
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6791
Same as above plus superheater percentage6791
Same as above but substitute firebox area for grate area24,264
Power L17283
Power MT396.45

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