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The reference for locomotives and railcars

Saxon I TV

German Reichsbahn class 980

Germany 1910 18 produced
Die Lokomotive, April 1913

With the Windberg railway, the Saxon State Railways operated a branch line near Dresden that combined a gradient of 2.5 percent with curve radii from 85 meters. Since the two-axle locomotives were no longer powerful enough around the turn of the century for the rapidly growing excursion traffic and the increasing quantities of coal transport, a more powerful tank locomotive was procured especially for this line.

Based on the IV K narrow-gauge locomotive, a larger Meyer-type compound locomotive was developed with two bogies. As in the prototype, there were two low and two high-pressure cylinders in the middle of the locomotive, which drove the front and rear wheel sets. To reduce rolling movements, the bogies were coupled to each other.

18 were delivered between 1910 and 1914, which were nicknamed “Windberglok” and “Kreuzspinne” (cross spider). Another locomotive was delivered to the Oberhohndorf-Reinsdorf coal railway and came to her sisters in 1940, when they were already owned by the Reichsbahn.

In 1925 the latter still took over 15 and gave them the numbers 98 001 to 98 015. The classification as class 98 marked them as local railway locomotives, although they were larger and heavier than most of this type. This can be explained by the fact that the development was carried out specifically for a single branch line and the focus was on suitability for small curve radii.

After the Second World War, most of the locomotives remained in service with the new Reichsbahn and were also used to transport uranium ore. Their life ended in 1967 when a diesel locomotive, the V 60, was ready that was also suitable for the tight curves. Today only 98 001 is preserved and exhibited in a museum.

98 001 in August 1983 in Freital-Hainsberg Wassen / CC BY-SA 3.0

Technical data

General

Property first batch third batch
Built 1910-1914
Manufacturers Hartmann
Wheel arrangement 0-4-0+0-4-0T (Günther-Meyer)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property first batch third batch
Length 11.62 m
Wheelbase 7.70 m
Empty mass 47.8 t 50.4 t
Service mass 59 t 62 t
Adhesion mass 59 t 62 t
Rigid wheelbase 4.00 m
Axle load 15.4 t
Water capacity 5,000 l
Fuel capacity 2.2 t (coal)

Boiler

Property first batch third batch
Grate area 1.6 m²
Firebox surface 6.8 m²
Tube heating surface 92.5 m²
Evaporative heating surface 99.3 m²
Total heating surface 99.3 m²

Power plant

Property first batch third batch
Driver diameter 1,260 mm
Boiler pressure 13 bar
Expansion type compound
Cylinders four, HP: 360 x 630 mm and LP: 570 x 630 mm

Power

Property first batch third batch
Power source steam
Indicated power 397 kW (540 PS)
Top speed 50 km/h
Starting effort 102.4 kN
Starting effort simple 122.8 kN

Calculated values

Property first batch third batch
Factor of adhesion 1 : 5.65 1 : 5.94
Optimal speed 24 km/h
Power-to-weight ratio 6.7 kW/t 6.4 kW/t
Heating Surface Equivalent 133.3 m²
Cylinder volume/HSE 1 : 2,168.14
Adhesive weight/Total 1 : 1.00
Tractive force/Heating surface 1 : 21.53
Grate area/Heating surface 1 : 62.06
Firebox/Tube surface 1 : 13.60
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