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Tonopah & Goldfield No. 1 and 2

Sumpter Valley No. 1 and 2

United States 1901 2 produced
SVRR Archive Harr Collection

In 1901, Baldwin built two three-foot gauge Moguls of their type 8-26-D for the Chateaugay Railroad in Upstate New York. They got the numbers 15 and 16 and were needed for the iron-making operations of the Chateaugay Iron Company. Unfortunately, 1901 was also the year when the Delaware and Hudson had acquired this line and started to convert it to standard gauge. 

Since these locomotives were optimal for steep lines with tight curves, they were instead delivered to the Tonopah Railroad in Nevada. There they became numbers 1 and 2 and entered service until the company became the Tonopah and Goldfield Railroad and also started to convert the line to standard gauge. 

In 1906, they were sold again to the Sumpter Valley Railway. There they still carried the numbers 1 and 2 which had been taken over by two older Moguls from 1881 also built by Baldwin which had come from the Utah & Northern Railway. The two new locomotives stayed in service until around 1930.

Technical data

General

Built
1901
Manufacturers
Baldwin
Wheel arrangement
2-6-0 (Mogul)
Gauge
914 mm (Three feet)

Dimensions and weights

Wheelbase
5.44 m
Total wheelbase
14.63 m
Service mass
33.9 t
Adhesion mass
30.2 t
Total mass
59.3 t
Rigid wheelbase
3.35 m
Axle load
10.1 t
Water capacity
9,842 l

Boiler

Grate area
1.226 m²
Firebox surface
8.482 m²
Tube heating surface
86.288 m²
Evaporative heating surface
94.77 m²
Total heating surface
94.8 m²

Power plant

Driver diameter
1,118 mm
Boiler pressure
11 bar
Expansion type
simple expansion
Cylinders
two, 406 x 508 mm

Power

Power source
steam
Estimated power
261 kW (355 PS)
Starting effort
70.4 kN

Calculated values

Factor of adhesion
1 : 4.21
Optimal speed
23 km/h
Power-to-weight ratio
7.7 kW/t
Heating Surface Equivalent
137.2 m²
Cylinder volume/HSE
1 : 960.73
Adhesive weight/Total
1 : 1.12
Tractive force/Heating surface
1 : 15.51
Grate area/Heating surface
1 : 77.30
Firebox/Tube surface
1 : 10.17
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