Catskill Mountain 4-4-0 "American" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 4 (Locobase 11117)

Data from Schenectady Locomotive Works, Illustrated Catalogue of Simple and Compound Locomotives (Philadelphia: J B Lippincott, 1897), pp. 54-55. See the Ulster & Delaware Railroad Historical Society's website at [] (last accessed 22 January 2010).

The CMR connected Greene County's Catskill with the Catskill Mountain House at Palenville over 15 3/4 miles of line. It was opened to Lawrenceville on 29 July 1882 and to Palenville in Spring 1883. The Cairo branch opened in 1885.

The line's success would be guaranteed only until resort goers could ride by car from farther-off stations or drive the whole way. Once that began in earnest in the 19teens, the CM was doomed and it closed after the 1918 tourist season.

The 4's capacious anthracite firebox doubtless kept down sparks.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID11,117
RailroadCatskill Mountain
Number in Class1
Road Numbers4
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.75 / 2.06
Engine Wheelbase (ft / m)18.42 / 5.61
Ratio of driving wheelbase to overall engine wheebase 0.37
Overall Wheelbase (engine & tender) (ft / m)40.50 / 12.34
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)36,000 / 16,329
Engine Weight (lbs / kg)56,100 / 25,447
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1600 / 6.06
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)30 / 15
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)49 / 1245
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)13" x 18" / 330x457
Tractive Effort (lbs / kg)8443 / 3829.68
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.26
Heating Ability
Firebox Area (sq ft / m2)82.90 / 7.70
Grate Area (sq ft / m2)15.26 / 1.42
Evaporative Heating Surface (sq ft / m2)672 / 62.45
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)672 / 62.45
Evaporative Heating Surface/Cylinder Volume243.02
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2442
Same as above plus superheater percentage2442
Same as above but substitute firebox area for grate area13,264
Power L15134
Power MT628.81

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Wes Barris