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 Wheelbase7'
Engine Wheelbase25.92'
Ratio of driving wheelbase to overall engine wheebase 0.27
Overall Wheelbase (engine & tender)50.23'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers81000 lbs
Engine Weight151000 lbs
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity5000 gals
Tender Fuel Capacity (oil/coal)2400 gals
Minimum weight of rail (calculated)68 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter70"
Boiler Pressure180 psi
Cylinders (dia x stroke)19" x 26"
Tractive Effort20515 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.95
Heating Ability
Firebox Area134.80 sq. ft
Grate Area37.73 sq. ft
Evaporative Heating Surface2285 sq. ft
Superheating Surface
Combined Heating Surface2285 sq. ft
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 area24264
Power L17283
Power MT396.45

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