National Tube Company 0-4-0 "Switcher" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 20 (Locobase 14997)

Data from Roy V Wright (Ed.) 1922 Locomotive Cyclopedia of American Practice, Sixth Edition (New York: Simmons-Boardman Publishing Company, 1922), p. 1025. Works numbers were 5843 in June 1916, 5844-5845 in July.

Specifications by Steve Llanso of Sweat House Media
Class20
Locobase ID14,997
RailroadNational Tube Company
CountryUSA
Whyte0-4-0ST
Number in Class3
Road Numbers20-22
GaugeStd
Number Built3
BuilderPorter
Year1916
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 5.75 / 1.75
Engine Wheelbase (ft / m) 5.75 / 1.75
Ratio of driving wheelbase to overall engine wheebase1
Overall Wheelbase (engine & tender) (ft / m) 5.75 / 1.75
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)96,000 / 43,545
Engine Weight (lbs / kg)96,000 / 43,545
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)96,000
Tender Water Capacity (gals / ML) / 2.65
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT) / 0.50
Minimum weight of rail (calculated) (lb/yd / kg/m)80 / 40
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 1067
Boiler Pressure (psi / kPa)175 / 12.10
High Pressure Cylinders (dia x stroke) (in / mm)17" x 20" / 432x508
Tractive Effort (lbs / kg)20,471 / 9285.50
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.69
Heating Ability
Firebox Area (sq ft / m2)73 / 6.78
Grate Area (sq ft / m2)18.75 / 1.74
Evaporative Heating Surface (sq ft / m2)870 / 80.82
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)870 / 80.82
Evaporative Heating Surface/Cylinder Volume165.58
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3281
Same as above plus superheater percentage3281
Same as above but substitute firebox area for grate area12,775
Power L12879
Power MT132.23