New York & Brooklyn Bridge 2-4-2 "Columbian" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 12 (Locobase 5867)

Data from American Engineer & Railroad Journal (AERJ), Volume LXIX, No 10 (October 1895), p. 473. Works numbers were 1579-1580 in April 1895.

The AERJ report describes these little tanks as performing "switching work of the severest kind" which called for a more substantial frame than the dimensions might otherwise indicate. The article also noted the "new device" fitted to the pony trucks at each end of the engine. The device was a set of curved inclined paths up which a pair of rollers would ride as the locomotive entered a curve. The incline encouraged the truck to center itself.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID5867
RailroadNew York & Brooklyn Bridge
Number in Class2
Road Numbers12-13
Number Built2
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)5 / 1.52
Engine Wheelbase (ft / m)18.98 / 5.79
Ratio of driving wheelbase to overall engine wheelbase 0.26
Overall Wheelbase (engine & tender) (ft / m)18.98 / 5.79
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)57,400 / 26,036
Engine Weight (lbs / kg)79,900 / 36,242
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)79,900
Tender Water Capacity (gals / ML)1000 / 3.79
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 0.80 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)48 / 24
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 1067
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)14" x 18" / 356x457
Tractive Effort (lbs / kg)11,424 / 5181.85
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.02
Heating Ability
Tubes (number - dia) (in / mm)166 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.25 / 2.51
Firebox Area (sq ft / m2)61.50 / 5.72
Grate Area (sq ft / m2)15 / 1.39
Evaporative Heating Surface (sq ft / m2)687 / 63.85
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)687 / 63.85
Evaporative Heating Surface/Cylinder Volume214.02
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2400
Same as above plus superheater percentage2400
Same as above but substitute firebox area for grate area9840
Power L13470
Power MT266.55

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Wes Barris