Prussian State 2-6-2 Locomotives in Germany

Class Details by Steve Llanso of Sweat House Media

Class T6 (Locobase 6347)

Data from Christian Lindecke data from [] (14 Nov 2004).

The only Prussian Prairie tank and overpowered by a wide margin, it seems, even for the duty of quickly accelerating trains on the Berlin Metropolitan line. The outside cylinders drove on the middle coupled axle, while the inside cylinder cranked on the leading coupled axle. The leading guiding axle used Adams radial boxes while the trailing carrying axle rode in a Krauss radial design. Each axle had 40 mm (1 1/2") of lateral play to each side.

According to a table in [] (14 Nove 2004), which displays some of the context of a detailed study of the laenderbahns, the 3-cylinder layout didn't last long. By 1908 the 12 locomotives in the class had been converted to a 2-cylinder design.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID6347
RailroadPrussian State
Number in Class12
Road Numbers6700-6711
Number Built12
BuilderBerliner Maschinenbau
Valve GearHeusinger
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.47 / 3.80
Engine Wheelbase (ft / m)29.53 / 9
Ratio of driving wheelbase to overall engine wheelbase 0.42
Overall Wheelbase (engine & tender) (ft / m)29.53 / 9
Axle Loading (Maximum Weight per Axle) (lbs / kg)36,486 / 16,550
Weight on Drivers (lbs / kg)107,585 / 48,800
Engine Weight (lbs / kg)174,055 / 78,950
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)174,055 / 78,950
Tender Water Capacity (gals / ML)1769 / 6.70
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.80 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)60 / 30
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)59.10 / 1500
Boiler Pressure (psi / kPa)203.10 / 14
High Pressure Cylinders (dia x stroke) (in / mm)19.69" x 24.8" / 500x630 (3)
Tractive Effort (lbs / kg)42,128 / 19108.96
Factor of Adhesion (Weight on Drivers/Tractive Effort) 2.55
Heating Ability
Tubes (number - dia) (in / mm)240 - 2.008" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.78 / 4.20
Firebox Area (sq ft / m2)128.04 / 11.90
Grate Area (sq ft / m2)24.75 / 2.30
Evaporative Heating Surface (sq ft / m2)1667 / 154.95
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1667 / 154.95
Evaporative Heating Surface/Cylinder Volume127.15
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5027
Same as above plus superheater percentage5027
Same as above but substitute firebox area for grate area26,005
Power L13521
Power MT216.46

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