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Badenian VII d
German Reichsbahn classes 5386 and 539
Germany | 1893 | 109 produced
Works photo of MBG Karlsruhe
Works photo of MBG Karlsruhe

After decades of procurement of the six-coupled freight locomotive of class VII a (previously X d), the Karlsruhe mechanical engineering company developed the VII d as a successor model. In line with the general trend in the 1990s, the new locomotive had a two-cylinder compound engine.

The first delivery from MBG Karlsruhe consisted of only two locomotives. These had a Belpaire firebox and inside valve gear, but the production locomotives used a Crampton boiler and the usual outside Heusinger valve gear.

A total of 59 units were delivered from Karlsruhe, but there were also 34 more from Maffei and 16 from Maschinenfabrik Esslingen. The model was initially the most powerful six-coupled freight locomotive in Germany. On the main line of the Baden State Railway, which has a gradient of 0.53 percent over a length of 6 km, freight trains weighing 500 to 630 tonnes could be transported at 20 to 30 km/h. However, as time progressed and more powerful locomotives appeared, the use of the VII d increasingly shifted to level routes.

In the preliminary renumbering plan of the Reichsbahn, the VII d was still listed as the series 5386 and 539, but it met the same fate as other older freight locomotives. With its low speed, it was no longer suitable for local freight trains and tank locomotives were preferred for shunting service. Thus, all engines were decommissioned by 1925 and not a single one got the new numbering.

Variant1893 variant1894 variant1901 variant
General
Built1893-1902
ManufacturerMBG Karlsruhe, Maffei, Esslingen
Axle config0-6-0 (Six-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length48 ft 6 7/16 in51 ft 2 1/16 in
Wheelbase11 ft 3 13/16 in
Fixed wheelbase11 ft 3 13/16 in
Empty weight84,437 lbs
Service weight96,562 lbs
Adhesive weight96,562 lbs
Axle load32,187 lbs
Water capacity2,113 us gal3,566 us gal
Fuel capacity8,818 lbs (coal)
Power
Power sourcesteam
Estimated power429 hp (320 kW)469 hp (350 kW)510 hp (380 kW)
Optimal speed14 mph16 mph17 mph
Top speed28 mph
Starting effort19,095 lbf19,092 lbf
with start valve22,914 lbf22,910 lbf
Power Plant
Driver diameter49.7 in
Boiler pressure174 psi
Expansion typecompound
Cylinderstwo, HP: 19 11/16 x 25 in
and LP: 27 9/16 x 25 in
two, HP: 19 5/16 x 25 in
and LP: 28 3/4 x 25 in
Boiler
Grate area15.6 sq ft17.4 sq ft18.5 sq ft
Firebox area80.9 sq ft
Tube heating area1,223.9 sq ft
Evaporative heating area1,304.8 sq ft
Total heating area1,304.8 sq ft
Calculated Values
steam locomotive
freight
last changed: 01/2022
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