United Swiss Railways Ec 2/2

Switzerland 1875 17 produced

No. 83 Alfred Moser & al., „Der Dampfbetrieb der Schweizerischen Eisenbahnen 1847—2006”

A total of 17 of these small tank locomotives were purchased by the VSB for shunting services and light local trains. Due to the long production period, the locomotives came from the workshops of the VSB and a total of three other different manufacturers. The last ones were delivered directly to the SBB. Despite the short wheelbase and small wheels, the top speed was 60 km/h. The water tank was inside the frame. In 1919 and 1920, five of the locomotives were converted into heating cars. The other locomotives were retired between 1908 and 1933.

Technical data

General

Property	1875 variant	1894 variant
Built	1875-1885	1894, 1902
Manufacturers	VSB, Hartmann, Esslingen	SLM
Wheel arrangement	0-4-0WT (Four-coupled)
Gauge	1,435 mm (Standard gauge)

Dimensions and weights

Property	1875 variant	1894 variant
Length	7.88 m	7.97 m
Service mass	28 t	31 t
Adhesion mass	28 t	31 t
Axle load	14 t	15.5 t
Water capacity	3,100 l
Fuel capacity	1 t (coal)

Boiler

Property	1875 variant	1894 variant
Grate area	1.1 m²
Evaporative heating surface	77.2 m²	93.8 m²
Total heating surface	77.2 m²	93.8 m²

Power plant

Property	1875 variant	1894 variant
Driver diameter	1,210 mm
Boiler pressure	12 bar
Expansion type	simple expansion
Cylinders	two, 350 x 540 mm

Power

Property	1875 variant	1894 variant
Power source	steam
Indicated power	221 kW (300 PS)
Top speed	60 km/h
Starting effort	55.8 kN

Calculated values

Property	1875 variant	1894 variant
Factor of adhesion	1 : 4.93	1 : 5.45
Optimal speed	24 km/h
Power-to-weight ratio	7.9 kW/t	7.1 kW/t
Adhesive weight/Total	1 : 1.00
Tractive force/Heating surface	1 : 15.09	1 : 12.42
Grate area/Heating surface	1 : 70.18	1 : 85.27

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