Data from "Some Engines of the German Railway Union," American Engineer and Railroad Journal, Vol LXVIII, No 7 (July 1894), pp. 308, 310.
This class had several unusual features. It used an rare wheel arrangement and could be run either as a 3-cylinder simple engine or, as outlined in the specs, a Smith-type 3-cylinder compound in which the two LP cylinders were each the same size as the one HP cylinder. (Interestingly, Smith's "pioneering" design came out in 1898, 4 years after this class entered service.)
The AERJ article explains that steam from the boiler first entered a steam chest above the middle, inside cylinder. If the train was being run as a simple-expansion engine, the valves let live steam into all 3 cylinders; the tractive effort calculates to 20,589 lb in that configuration. When running compound, a valve in the steam chest limited the steam pressure to the outside valves to 1/2 the MEP of the center cylinder. Valve gear was a mixture of Walschaerts on the center cylinder, Allan on the two outside cylinders.
The profile showed a long, straight boiler, and short stack with a thick cap. The class was rated at 150 trailing tons up a continuous 1% grade (AERJ says 10%, but that's a misunderstanding of the continental mm/metre measurement) at 60 km/h (37 mph).
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | E |
Locobase ID | 5692 |
Railroad | Wurttembergische (Wurttemberg) Staatsbahn |
Country | Germany |
Whyte | 2-4-2 |
Number in Class | 10 |
Road Numbers | 401-410 |
Gauge | Std |
Number Built | 10 |
Builder | Cockerill |
Year | 1892 |
Valve Gear | mixed |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 7 / 2.13 |
Engine Wheelbase (ft / m) | 19.03 / 5.80 |
Ratio of driving wheelbase to overall engine wheelbase | 0.37 |
Overall Wheelbase (engine & tender) (ft / m) | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 30,424 / 13,800 |
Weight on Drivers (lbs / kg) | 60,848 / 27,600 |
Engine Weight (lbs / kg) | 119,490 / 54,200 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 2640 / 10 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 51 / 25.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 65 / 1650 |
Boiler Pressure (psi / kPa) | 174 / 1200 |
High Pressure Cylinders (dia x stroke) (in / mm) | 16.54" x 22.05" / 420x560 (1) |
Low Pressure Cylinders (dia x stroke) (in / mm) | 16.54" x 22.05" / 420x560 |
Tractive Effort (lbs / kg) | 10,294 / 4669.29 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.91 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 250 - 1.625" / 41 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 14.11 / 4.30 |
Firebox Area (sq ft / m2) | 103.30 / 9.60 |
Grate Area (sq ft / m2) | 21.52 / 2 |
Evaporative Heating Surface (sq ft / m2) | 1594 / 148.10 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1594 / 148.10 |
Evaporative Heating Surface/Cylinder Volume | 581.38 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 3744 |
Same as above plus superheater percentage | 3744 |
Same as above but substitute firebox area for grate area | 17,974 |
Power L1 | 7255 |
Power MT | 525.72 |