Camden & Amboy 2-2-0 "Planet" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Old Ironsides (Locobase 3221)

Heating surface and grate area from Sinclair (1907). Works number 1.

This engine, Matthias Baldwin's first to be built from scratch, is said to be a copy of the Planet type then in use in England. Baldwin had assembled the Delaware, imported from Robert Stephenson & Co for the New Castle & Frenchtown, and almost immediately turned out this example. Paul T Warner's 1925 history of the Baldwin works (reproduced in Westing, 1966) perhaps has a better view of the relationship when it describes Old Ironsides as "modeled essentially" on the English practice of the day.

Its front carrying axle had wheels that at 45" diameter were almost as tall as the drivers. In most other respects, Baldwin followed British practice. Although possessing some idiosyncracies, like a single exhaust header connecting the two cylinders -- which was soon changed to individual exhaust pipes into the smokebox, the engine performed reasonably well, giving rise to hopes, according to the November 24, 1832 Chronicle, that the engine might draw 30 tons at 40 mph.

It quickly proved too small for growing traffic demands.

Specifications by Steve Llanso of Sweat House Media
ClassOld Ironsides
Locobase ID3221
RailroadCamden & Amboy
Number in Class1
Road Numbers
Number Built1
BuilderMatthias Baldwin
Valve Gear
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 Weight10000 lbs
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 Diameter54"
Boiler Pressure40 psi
Cylinders (dia x stroke)9.5" x 18"
Tractive Effort1023 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Firebox Area
Grate Area 6.78 sq. ft
Evaporative Heating Surface209 sq. ft
Superheating Surface
Combined Heating Surface209 sq. ft
Evaporative Heating Surface/Cylinder Volume141.53
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation271
Same as above plus superheater percentage271
Same as above but substitute firebox area for grate area0
Power L10
Power MT

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