Unspecified 2-4-4 Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class Forney (Locobase 10024)

Data from Park Benjamin (Ed), Appleton's Cyclopedia of Applied Mechanics (New York: D Appleton & Company, 1884), p. 341. Boiler pressure is an estimate.

Rogers built Forneys for a variety of commuter roads. This one was smaller than most of the ones whose owners Locobase can identify. The four locomotives with these power dimensions were two built for the Skaneatles railroad of upstate New York (#2 in 1870 was works number 1697 in January 1870, #3 in 1872 was works numbers 2043 in March 1872), the Chattanooga for the New Orleans Mobile & Chattanooga for their 5-foot gauge (works number 1828 in December 1870), and the Connecticut Western's #1 (works number 1869 in March 1871).

One little design detail was the provision of a triptych-style cab window in which the center arched opening was taller than either of its flanking panes.

Specifications by Steve Llanso of Sweat House Media
ClassForney
Locobase ID10024
Railroad
CountryUSA
Whyte2-4-4T
Number in Class4
Road Numbers
GaugeStd
Number Built4
BuilderRogers
Year1870
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 6.50'
Engine Wheelbase25.71'
Ratio of driving wheelbase to overall engine wheebase 0.25
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers40000 lbs
Engine Weight75000 lbs
Tender Light Weight
Total Engine and Tender Weight75000 lbs
Tender Water Capacity1000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)33 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter48.75"
Boiler Pressure140 psi
Cylinders (dia x stroke)15" x 22"
Tractive Effort12083 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.31
Heating Ability
Firebox Area82 sq. ft
Grate Area11.84 sq. ft
Evaporative Heating Surface793 sq. ft
Superheating Surface
Combined Heating Surface793 sq. ft
Evaporative Heating Surface/Cylinder Volume176.23
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1658
Same as above plus superheater percentage1658
Same as above but substitute firebox area for grate area11480
Power L13041
Power MT335.21


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