Prussian State 0-6-2 Locomotives in Germany


Class Details by Steve Llanso of Sweat House Media

Class T 9.1 / BR 90 0-2 (Locobase 6365)

Data from Christian Lindecke data from [] (21 Nov 2004), supplemented by Albert Gieseler at [], last accessed on 10 May 2011. See also diagram UG Type 115, Societe Alsacienne de Constructions Mecaniques from locomotive book supplied by Dany Machi up at [] as

Diagrammes des machines SACM construites a GRAFENSTADEN (October 2007).

Designed by Borsig and built to the standard specification (Musterblatt) III0-4f, these radial tanks were essentially an enlargement of the T7 six-coupleds (see Locobase 6364) and were used in the same short-haul heavy freight service. Their boilers and grate were both larger, but their cylinder dimensions and tanks were virtually identical. The trailing axle used an Adams design and the locomotive also supported passenger traffic as well.

In 1925, the DRG grouped 231 in the BauReihe 90 (90 001-231). Lindecke reports a bit of sloppiness in class assignments with some T9 2 2-6-0Ts being given BR 90 designations, while some T9 1s were mistakenly categorized as BR 91s. Whle most of the T9 1s had been retired by 1930, others, especially those in Poland and from private railways later joined the DRG stud and some remained in service until 1953.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassT 9.1 / BR 90 0-2
Locobase ID6365
RailroadPrussian State
CountryPrussia
Whyte0-6-2T
Number in Class420
Road Numbers90 001-90 231
GaugeStd
Number Built420
Builderseveral
Year1892
Valve GearHeusinger
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.14 / 3.70
Engine Wheelbase (ft / m)20.01 / 6.10
Ratio of driving wheelbase to overall engine wheelbase 0.61
Overall Wheelbase (engine & tender) (ft / m)20.01 / 6.10
Axle Loading (Maximum Weight per Axle) (lbs / kg)31,306 / 14,200
Weight on Drivers (lbs / kg)91,492 / 41,500
Engine Weight (lbs / kg)120,152 / 54,500
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)120,152 / 54,500
Tender Water Capacity (gals / ML)1531 / 5.80
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.70 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)51 / 25.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)53.10 / 1350
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)16.93" x 24.8" / 430x630
Tractive Effort (lbs / kg)19,799 / 8980.69
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.62
Heating Ability
Tubes (number - dia) (in / mm)162 - 1.772" / 45
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)14.44 / 4.40
Firebox Area (sq ft / m2)78.15 / 7.26
Grate Area (sq ft / m2)16.47 / 1.53
Evaporative Heating Surface (sq ft / m2)1163 / 108.04
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1163 / 108.04
Evaporative Heating Surface/Cylinder Volume179.99
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2866
Same as above plus superheater percentage2866
Same as above but substitute firebox area for grate area13,598
Power L13703
Power MT267.69

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