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The reference for locomotives and railcars

Minarets & Western No. 102 to 104

United States 1923 3 produced
No. 103 in November 1935 at Fresno, California Martin Hansen collection

The Sugar Pine Lumber Company had founded the Minarets & Western Railway to operate a main line that connected their saw mill over 53 miles with the network of the Southern Pacific. This railroad and its parent mostly ordered their locomotives from ALCO-Brooks, and also the three Mikados No. 102 to 104 came from this company. They were delivered in 1923 and were considerably heavier than No. 101 that had come two years earlier. They had 52-inch drivers and cylinders of 24.5 by 28 inches. Their tender had a capacity of 10,000 gallons of water and ten tons of coal.

The parent company went bankrupt in 1933 and two years later, all four locomotives of the Minarets & Western were sold to the Southern Pacific. Numbers 102 and 104 were used as switchers and got the numbers 3295 and 3296. The first one was retired in 1953, while the second one had already been sold to Long-Bell Lumber in 1940. 103 had directly been sold again to the Chicago & Illinois Midland and never received a Southern Pacific number. It was scrapped in 1954.

Technical data

General

Built
1923
Manufacturers
ALCO
Wheel arrangement
2-8-2 (Mikado)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Wheelbase
10.14 m
Total wheelbase
20.71 m
Service mass
117.4 t
Adhesion mass
94.3 t
Total mass
195.4 t
Rigid wheelbase
4.45 m
Water capacity
37,854 l
Fuel capacity
9.1 t (coal)

Boiler

Grate area
5.881 m²
Firebox surface
26.57 m²
Tube heating surface
303.236 m²
Evaporative heating surface
329.806 m²
Superheater surface
80.082 m²
Total heating surface
409.9 m²

Power plant

Driver diameter
1,321 mm
Boiler pressure
13.8 bar
Expansion type
simple expansion
Cylinders
two, 622 x 711 mm

Power

Power source
steam
Estimated power
2,088 kW (2,839 PS)
Starting effort
244.4 kN

Calculated values

Factor of adhesion
1 : 3.78
Optimal speed
51 km/h
Power-to-weight ratio
17.8 kW/t
Heating Surface Equivalent
622.8 m²
Cylinder volume/HSE
1 : 694.62
Adhesive weight/Total
1 : 1.25
Tractive force/Heating surface
1 : 12.45
Grate area/Heating surface
1 : 69.70
Firebox/Tube surface
1 : 11.41
Total/Superheater
1 : 4.12
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