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The reference for locomotives and railcars

Saxon VIII 2

German Reichsbahn class 1370

Germany 1891 20 produced
Works photo of the “Stockholm” PD

When the Saxon 2-4-0 express locomotives were not powerful enough anymore, Hartmann delivered the first locomotive of the class VIII 2 in 1891. They were of the wheel arrangement 4-4-0 and in contrast to many contemporary express locomotives, they were no compounds. The cylinders were outside and the Allan valve gear was on the inside. From the start, only the second batch of ten had a Westinghouse brake while the first batch was later retrofitted.

18 of the 20 locomotives were named after European cities. One was named “Priestewitz”, while one got the name “Zweitausend” (“two thousand”) since it had also works number 2000 of Hartmann. The Prussian S 2, Erfurt type, that was built from 1892 was very similar to the VIII 2, although it had larger drivers. In Saxony, the VIII 2 was surpassed by the VIII V 1 as early as 1896 and was soon deployed in less important services. The Reichsbahn received twelve surviving locomotives, designated them class 1370 and retired the last ones in 1928.

Technical data

General

Property 1891 variant 1894 variant
Built 1891 1894
Manufacturers Hartmann
Wheel arrangement 4-4-0 (American)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property 1891 variant 1894 variant
Length 16.48 m
Wheelbase 6.75 m
Empty mass 44.6 t 43.4 t
Service mass 49.4 t 48.2 t
Adhesion mass 28 t 27.8 t
Rigid wheelbase 2.40 m
Axle load 14 t 13.9 t

Boiler

Property 1891 variant 1894 variant
Grate area 2.33 m² 2.32 m²
Firebox surface 10.2 m² 10.25 m²
Tube heating surface 109.3 m² 111.29 m²
Evaporative heating surface 119.5 m² 121.54 m²
Total heating surface 119.5 m² 121.5 m²

Power plant

Property 1891 variant 1894 variant
Driver diameter 1,875 mm
Boiler pressure 10 bar 12 bar
Expansion type simple expansion
Cylinders two, 440 x 600 mm

Power

Property 1891 variant 1894 variant
Power source steam
Estimated power 500 kW (680 PS)
Top speed 85 km/h 95 km/h
Starting effort 52.7 kN 63.2 kN

Calculated values

Property 1891 variant 1894 variant
Factor of adhesion 1 : 5.22 1 : 4.32
Optimal speed 58 km/h 48 km/h
Power-to-weight ratio 10.1 kW/t 10.4 kW/t
Heating Surface Equivalent 170.5 m² 172.8 m²
Cylinder volume/HSE 1 : 1,070.17 1 : 1,055.99
Adhesive weight/Total 1 : 1.76 1 : 1.73
Tractive force/Heating surface 1 : 9.20 1 : 10.86
Grate area/Heating surface 1 : 51.29 1 : 52.39
Firebox/Tube surface 1 : 10.72 1 : 10.86
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