Data from [], last accessed 28 September 2008, supplemented by []
These little tanks were delivered in two batches. The first set of orders were produced by two companies. Schwartszkopff delivered a set to the Muldenthal-Eisenbahngesellschaft. At the same time SSchsische Maschinenfabrik (the renamed Hartmann) delivered identical engines to Chemnitz-Aue-Adorfer Eisenbahn-Gesellschaft (ChAA).
All of them had tall steam domes in front of squared-off Belpaire fireboxes and tall inversely tapered stacks. Weight grew steadily with the delivery of each pair of locomotives. The first two weighed in in 1875 at 29,300 kg adhesive weight, 38,700 kg engine weight and had slightly larger firebox heating surfaces of 6.55 sq m.
Soon after these orders, the two railways were absorbed by the state railway system. In late 1880s, the SStE added 20 locomotives to the stud in three separate orders in the 1889-1892 period.
When the DRG stood up in 1925, it retained 9 of the IIIb which it then designated BR 98 72. All of these had been retired by the end of the 1920s, although one served in an industrial setting (RAW Leipzig) until 1934.
Although 9 were taken into the DRG
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | IIIb T / BR 98 72 |
Locobase ID | 9577 |
Railroad | Saechsischen (Saxon) Staats-Eisenbahnen |
Country | Germany |
Whyte | 0-4-2T |
Number in Class | 42 |
Road Numbers | 98 7211-12, 7221-7227 |
Gauge | Std |
Number Built | 42 |
Builder | several |
Year | 1875 |
Valve Gear | Heusinger |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 9.19 / 2.80 |
Engine Wheelbase (ft / m) | 13.21 / 4.03 |
Ratio of driving wheelbase to overall engine wheelbase | 0.70 |
Overall Wheelbase (engine & tender) (ft / m) | 13.21 / 4.03 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 33,510 / 15,200 |
Weight on Drivers (lbs / kg) | 67,241 / 30,500 |
Engine Weight (lbs / kg) | 91,712 / 41,600 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | 91,712 / 41,600 |
Tender Water Capacity (gals / ML) | 950 / 3.60 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.10 / 1 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 56 / 28 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 55.90 / 1420 |
Boiler Pressure (psi / kPa) | 145 / 1000 |
High Pressure Cylinders (dia x stroke) (in / mm) | 22.01" x 16.34" / 559x415 |
Tractive Effort (lbs / kg) | 17,453 / 7916.56 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.85 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 176 - 1.772" / 45 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 10.40 / 3.17 |
Firebox Area (sq ft / m2) | 69.29 / 6.44 |
Grate Area (sq ft / m2) | 13.67 / 1.27 |
Evaporative Heating Surface (sq ft / m2) | 823 / 76.46 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 823 / 76.46 |
Evaporative Heating Surface/Cylinder Volume | 114.38 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 1982 |
Same as above plus superheater percentage | 1982 |
Same as above but substitute firebox area for grate area | 10,047 |
Power L1 | 2196 |
Power MT | 144.00 |