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

Class Details by Steve Llanso of Sweat House Media

Class Governor Williamson (Locobase 11736)

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

A contemporary illustration showed a Gothic-revival cab with two 4-paned windows, each in the lancet style. Poor waxed effusively 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."

Specifications by Steve Llanso of Sweat House Media
ClassGovernor Williamson
Locobase ID11736
RailroadNew Jersey
Number in Class1
Road Numbers
Number Built1
BuilderDanforth, Cooke
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase
Engine Wheelbase
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers
Engine Weight
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)0
Geometry Relating to Tractive Effort
Driver Diameter72"
Boiler Pressure100 psi
Cylinders (dia x stroke)15" x 20"
Tractive Effort5313 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Firebox Area78.50 sq. ft
Grate Area13.89 sq. ft
Evaporative Heating Surface856 sq. ft
Superheating Surface
Combined Heating Surface856 sq. ft
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

If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.