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The reference for locomotives and railcars

Sierra Railway No. 24

United States 1912 1 produced
Shortly before her scrapping in 1955 in Bayshore, California Doug Richter / collection Martin E. Hansen

The locomotive that spent most of its life as Sierra Railway No. 24 was originally operated by the Nevada Copper Belt as their No. 3. After these mines had started to work in 1904, they opened a 42-mile rail network to bring a rising quantity of copper ore from the mines at Yerington and Mason to the smelter plant at Thompson in 1909. Delivered by Baldwin in 1912, this locomotive was a oil-burning Consolidation with a service weight of 163,000 pounds. It was not superheated, but had its firebox completely lined with firebrick to utilize more of the heat from the oil.

The Sierra Railway bought this locomotive in 1921, when it was only nine years old. There it was the largest 2-8-0 by a large margin. In 1955 this company, now called Sierra Railroad, made the switch from steam to diesel. But while other steam locomotives were preserved for movie and excursion service, No. 24 was scrapped in the same year. The photo shows it on its way to the scrapyard when all ornaments and the cylinder rods had already been removed.

Technical data

General

Built
1912
Manufacturers
Baldwin
Wheel arrangement
2-8-0 (Consolidation)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Wheelbase
6.88 m
Total wheelbase
15.94 m
Service mass
73.9 t
Adhesion mass
66.2 t
Total mass
119.3 t
Rigid wheelbase
4.27 m
Axle load
16.6 t
Water capacity
18,927 l
Fuel capacity
9,085 l (oil)

Boiler

Grate area
3.038 m²
Firebox surface
15.794 m²
Tube heating surface
221.853 m²
Evaporative heating surface
237.646 m²
Total heating surface
237.6 m²

Power plant

Driver diameter
1,270 mm
Boiler pressure
13.8 bar
Expansion type
simple expansion
Cylinders
two, 508 x 660 mm

Power

Power source
steam
Estimated power
820 kW (1,115 PS)
Starting effort
157.3 kN

Calculated values

Factor of adhesion
1 : 4.13
Optimal speed
32 km/h
Power-to-weight ratio
11.1 kW/t
Heating Surface Equivalent
316.6 m²
Cylinder volume/HSE
1 : 845.51
Adhesive weight/Total
1 : 1.12
Tractive force/Heating surface
1 : 13.82
Grate area/Heating surface
1 : 78.22
Firebox/Tube surface
1 : 14.05
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