Cornwall 4-4-0 "American" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 14 (Locobase 11795)

Data from Mark Cain's, supplemented by DeGolyer, Vol 74, pp. 7+. Works number was 57811 in June 1924.

This Pennsylvania railroad was NOT the Cornwall & Lebanon, although its route paralleled that of the C & L. Instead, the 11.8-mile Old Corny served the Lancaster and Lebanon county area for a century as an independent railroad and for most of that time was very prosperous hauling iron ore from the largest deposit east of the Mississippi.

This late-coming Eight-wheeler needed to make few concessions to state-of-the-art passenger engine design. Its firebox accessories were limited to 12 sq ft (1.1 sq m) of arch tubes to augment the firebox heating surface area. Superheating meant using 10" (254 mm) piston valves for steam distribution. The specs advised that details were to be same as for two earlier 0-6-0s (See DeGolyer, Vol 74, pp. 11+.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID11,795
Number in Class1
Road Numbers14
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)8 / 2.44
Engine Wheelbase (ft / m)23 / 7.01
Ratio of driving wheelbase to overall engine wheebase 0.35
Overall Wheelbase (engine & tender) (ft / m)52.31 / 15.94
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)102,540 / 46,511
Engine Weight (lbs / kg)152,920 / 69,363
Tender Loaded Weight (lbs / kg)110,000 / 49,895
Total Engine and Tender Weight (lbs / kg)262,920 / 119,258
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)10 / 9.10
Minimum weight of rail (calculated) (lb/yd / kg/m)85 / 42.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)66 / 1676
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)20" x 24" / 508x610
Tractive Effort (lbs / kg)24,727 / 11215.99
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.15
Heating Ability
Firebox Area (sq ft / m2)194 / 18.21
Grate Area (sq ft / m2)33.20 / 3.08
Evaporative Heating Surface (sq ft / m2)1817 / 168.80
Superheating Surface (sq ft / m2)392 / 36.42
Combined Heating Surface (sq ft / m2)2209 / 205.22
Evaporative Heating Surface/Cylinder Volume208.21
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6640
Same as above plus superheater percentage7835
Same as above but substitute firebox area for grate area45,784
Power L115,920
Power MT684.56

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