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Central Pacific No. 3 “C. P. Huntington”

United States 1863 1 produced
Locomotive Magazine, July 1931

During the American Civil War, when all the major locomotive works were busy producing for the war factions, the Central Pacific was in search of locomotives for its eastward expansion. Since no powerful tender locomotives could be found, the two small 4-2-4T tank locomotives with the names “C.P. Huntington” and “T.D. Judah” were purchased from Cooke. The former was named after Collis Potter Huntington, who was one of the “Big Four” and thus played a key role in the realization of the First Transcontinental Railroad.

After the procurement of more powerful locomotives, the No. 3 quickly lost importance due to its low power and small supplies and was used in front of construction trains. After being taken over by the Southern Pacific, it was assigned number 1 because of its importance and took on lighter duties in northern California. It was on display from 1888, but ended up in storage as early as 1891, only to be converted into a mobile weed incinerator ten years later.

A new life for the locomotive began in 1910 when it was restored to working order. In the decades that followed, it participated in many parades and exhibitions, including the opening of Union Station in Los Angeles. In 1964 it was sold to the State of California, which has exhibited it at the California State Railroad Museum since 1981 after it had been at two other locations in Sacramento. Since 1960, more than 400 scaled-down replicas have been manufactured in two feet gauge, which have been available with different types of power for several years.

“C.P. Huntington” in the California State Railroad Museum Joe Ross / CC BY-SA 2.0

Technical data

General

Built
1863
Manufacturers
Cooke
Wheel arrangement
4-2-4T (Huntington)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Wheelbase
6.45 m
Service mass
19.7 t
Adhesion mass
7.2 t
Axle load
7.2 t
Water capacity
1,136 l
Fuel capacity
0.4 t (wood)

Boiler

Grate area
0.872 m²
Firebox surface
5.388 m²
Tube heating surface
33.538 m²
Evaporative heating surface
38.926 m²
Total heating surface
38.9 m²

Power plant

Driver diameter
1,372 mm
Boiler pressure
8.6 bar
Expansion type
simple expansion
Cylinders
two, 279 x 381 mm

Power

Power source
steam
Estimated power
93 kW (126 PS)
Starting effort
15.9 kN

Calculated values

Factor of adhesion
1 : 4.48
Optimal speed
35 km/h
Power-to-weight ratio
4.7 kW/t
Heating Surface Equivalent
65.9 m²
Cylinder volume/HSE
1 : 709.31
Adhesive weight/Total
1 : 2.72
Tractive force/Heating surface
1 : 8.52
Grate area/Heating surface
1 : 44.64
Firebox/Tube surface
1 : 6.22
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