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Palatinate Railways T 2I
German Reichsbahn class 8875
Germany | 1865 | 8 produced
Factory photo of one of the Baden machines, still without driver's cab
Factory photo of one of the Baden machines, still without driver's cab

The small tender locomotives of the class T 2I were procured by the Pfalzbahn specifically for use on pontoon bridges. What was special about these bridges was that the locomotives had to be as light as possible, but the sinking of the pontoons meant that an incline of around two percent had to be overcome continuously.

In order to meet these requirements, the machines were designed according to modern aspects. For example, an inside plate frame was installed, which offered high strength at low weight. In addition, the steam was extracted from the dome via a pipe, which led to the front of the boiler crown to the regulator.

The first series consisted of only two locomotives and was delivered in 1865. These operated the pontoon bridge over the Rhine near Maxau on the recently completed route from Winden to Karlsruhe. In contrast to the later variants, these had no driver's cab. These were reinforced with another three locomotives, which were added from 1869. Three more were procured for the bridge in Speyer within the same series. Two of the last three machines were later bought by the Baden State Railways and designated I b2. The latter ordered another machine, which was delivered in 1893.

Badische machine with a driver's cab later added
Badische machine with a driver's cab later added
Die Lokomotive, June 1939

After the Pfalzbahn was taken over by the Bavarian State Railways, the machines were replaced by class D VI in the 1920s. Three still made it into the Reichsbahn's renumbering plan, but they were decommissioned shortly before the renumbering. Only the three units of the Baden State Railways survived until 1926. They were taken over by the Reichsbahn as road numbers 88 7501 to 88 7503.

Variant1865 variant1869 variant1893 variant
General
Built18651869-18741893
ManufacturerMBG Karlsruhe
Axle config0-4-0T (Four-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length22 ft 3 11/16 in22 ft 5 11/16 in22 ft 6 11/16 in
Wheelbase6 ft 10 11/16 in
Fixed wheelbase6 ft 10 11/16 in
Empty weight33,069 lbs36,597 lbs39,926 lbs
Service weight39,683 lbs44,092 lbs48,061 lbs
Adhesive weight39,683 lbs44,092 lbs48,061 lbs
Axle load19,842 lbs24,030 lbs
Water capacity264 us gal528 us gal594 us gal
Fuel capacity551 lbs (coal)1,543 lbs (coal)
Power
Power sourcesteam
Estimated power121 hp (90 kW)161 hp (120 kW)174 hp (130 kW)
Optimal speed15 mph14 mph15 mph
Top speed28 mph
Starting effort5,188 lbf7,330 lbf7,177 lbf
Power Plant
Driver diameter37.4 in37 in37.8 in
Boiler pressure104 psi145 psi
Expansion typesimple
Cylinderstwo, 11 x 18 intwo, 11 x 18 1/8 in
Boiler
Grate area8.1 sq ft7 sq ft8.1 sq ft
Firebox area44.1 sq ft53.3 sq ft
Tube heating area449.9 sq ft484.9 sq ft
Evaporative heating area494.1 sq ft538.2 sq ft
Total heating area494.1 sq ft538.2 sq ft
Calculated Values
steam locomotive
bridge locomotive
switcher
tank locomotive
last changed: 01/2022
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