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The reference for locomotives and railcars

Camden & Amboy Railroad “John Bull”

United States 1831 1 produced
“John Bull” after installing the leading truck, but still without the cab Library of Congress  PD

The “John Bull” was a locomotive built by Robert Stephenson & Co. in England and was among the first to be used in the United States. It was built in 1831, initially as a 0-4-0 and was shipped disassembled to New Jersey. There it was reassembled by the Camden & Amboy and christened “John Bull”, which was a personification of England. Since only horses were used in the construction of the railroad, the locomotive was not used until 1833, after it opened.

It initially had no cab and the tender was a home-made design that used a whiskey barrel as a water tank. After it derailed several times on the cheaper laid American tracks, a leading axle including a cow catcher was added, which gave it its well-known, distinctive appearance. The coupling rods were removed, meaning only the last axle was powered. Later it received a real tender and then a cab.

This nickname was soon officially adopted, so the name “Stevens” fell out of use. Its active service with the Camden & Amboy lasted until 1866. After the PRR purchased the C&A in 1871, it was restored and used for various public demonstrations. It came into the possession of the Smithsonian in 1884 and was not moved for a long time. After the PRR had a working replica built in 1939, the original was moved again under its own power in 1981 for its 150th birthday, making it the oldest operational locomotive in the world.

Drawing of the original appearance with two cars Railway and Locomotive Engineering, March 1891

Technical data

General

Property as built rebuilt
Built 1831
Manufacturers Robert Stephenson & Co. Camden & Amboy
Wheel arrangement 0-4-0 (Four-coupled) 4-2-0
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property as built rebuilt
Wheelbase 1.50 m
Service mass 9.1 t
Rigid wheelbase 1.50 m

Boiler

Property as built rebuilt
Grate area 0.936 m²
Firebox surface 3.233 m²
Tube heating surface 24.359 m²
Evaporative heating surface 27.592 m²
Total heating surface 27.6 m²

Power plant

Property as built rebuilt
Driver diameter 1,372 mm
Boiler pressure 2.8 bar
Expansion type simple expansion
Cylinders two, 229 x 508 mm

Power

Property as built rebuilt
Power source steam
Estimated power 37 kW (50 PS)
Starting effort 4.5 kN

Calculated values

Property as built rebuilt
Optimal speed 50 km/h
Power-to-weight ratio 4.1 kW/t
Heating Surface Equivalent 43.8 m²
Cylinder volume/HSE 1 : 952.99
Tractive force/Heating surface 1 : 3.43
Grate area/Heating surface 1 : 29.48
Firebox/Tube surface 1 : 7.53
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