New Jersey 4-4-0 "American" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class Governor Williamson (Locobase 11736)

Data from Henry Varnum Poor (ed), "Locomotive Governor Williamson," American Railroad Journal, Volume 27, whole number 989 (15 April 1854), p. 230.

A contemporary illustration showed a Gothic-revival cab with two four-paned windows, each in the lancet style. Poor waxed effusive about the size and quality of this design:

"There have been but few engines mado in this country which have received more liberal proportions of heating surface and boiler room than the subject under our notice."

He later summarized the engine's virtues: "For durability every reasonable requisite is attained both in the quality and in the finish and mode ef connection of the material. It is pleasing to notice such secure and substantial frames, spring-suspensions, trucks, rockers, valve motions, boiler braces and stays, etc., as the Paterson engines afford, and especially gratifying to see such examples of locomotive construction so well appreciated and patronized in these times, when orders are so likely to be influenced by the sole consideration of price.

"In beauty of form and elegance of proportion, ...[i]n color, polish and decoration the engine is in keeping with the other qualities which we have designated."

Principal Dimensions by Steve Llanso of Sweat House Media
ClassGovernor Williamson
Locobase ID11,736
RailroadNew Jersey
Number in Class1
Road Numbers
Number Built1
BuilderDanforth, Cooke
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)72 / 1829
Boiler Pressure (psi / kPa)100 / 6.20
High Pressure Cylinders (dia x stroke) (in / mm)15" x 20" / 381x508
Tractive Effort (lbs / kg)5313 / 2409.94
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Firebox Area (sq ft / m2)78.50 / 7.30
Grate Area (sq ft / m2)13.89 / 1.29
Evaporative Heating Surface (sq ft / m2)856 / 79.55
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)856 / 79.55
Evaporative Heating Surface/Cylinder Volume209.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1389
Same as above plus superheater percentage1389
Same as above but substitute firebox area for grate area7850
Power L13663
Power MT

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