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The reference for locomotives and railcars

Bavarian D VII

German Reichsbahn class 9876

Germany 1880 75 produced
The "Fürstenzell" in April 1894 at the opening of the Erlangen-Bruck - Herzogenaurach line Stadtarchiv Herzogenaurach / „Erlanger Stadtlexikon” PD

In addition to the D VI, six-coupled tank locomotives were also procured for steeper local railway routes. While the smaller D VI was built by both Maffei and Krauss from the start, these manufacturers supplied two different models for the higher requirements. One of them was the D V from Maffei, which, however, could not meet the requirements placed on it and was therefore only built ten times. In contrast, the D VII from Krauss was able to convince, and so both companies now delivered a total of 75 pieces at the same time up to 1885.

As with its smaller sister, vacuum brakes were installed right from the start, which were later replaced by air brakes. For use on steep stretches, it was also fitted with a Riggenbach counter-pressure brake. With the exception of one example, the Reichsbahn took over all of them and classified them as class 9876. Their decommissioning began soon after the takeover and was completed by 1935. One machine each survived in the Nuremberg and Hof depots and was used there for shunting until 1960. A previously decommissioned example, the former number 1854 or 98 7658, can now be viewed in the Localbahn Museum in Bayerisch Eisenstein.

Technical data

General

Property 1880 variant 1885 variant
Built 1880-1885 1885-1895
Manufacturers Maffei, Krauss
Wheel arrangement 0-6-0T (Six-coupled)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property 1880 variant 1885 variant
Length 7.55 m 1.77 m
Empty mass 18.2 t 20.7 t
Service mass 26.7 t 28.2 t
Adhesion mass 26.7 t 28.2 t
Axle load 8.9 t 9.4 t
Water capacity 3,200 l 3,700 l
Fuel capacity 0.8 t (coal) 1 t (coal)

Boiler

Property 1880 variant 1885 variant
Grate area 0.83 m²
Evaporative heating surface 50.16 m²
Total heating surface 50.2 m²

Power plant

Property 1880 variant 1885 variant
Driver diameter 1,006 mm
Boiler pressure 12 bar
Expansion type simple expansion
Cylinders two, 330 x 508 mm

Power

Property 1880 variant 1885 variant
Power source steam
Indicated power 130 kW (177 PS)
Top speed 45 km/h
Starting effort 56.1 kN

Calculated values

Property 1880 variant 1885 variant
Factor of adhesion 1 : 4.67 1 : 4.93
Optimal speed 14 km/h
Power-to-weight ratio 4.9 kW/t 4.6 kW/t
Adhesive weight/Total 1 : 1.00
Tractive force/Heating surface 1 : 23.36
Grate area/Heating surface 1 : 60.43
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