Data from "Badische VIIIc" in Wikipedia at [], last accessed 29 September 2022.
Bad.St.B acquired two Mallets, the first in Germany, in 1893 because they believed that four driven axles in a rigid wheelbase would be too unwieldy on the curvy Schwarzwald railway. Grafenstaden supplied the first two (works numbers in 4536-7).
The first two (which had 12 bar boiler pressure, and a slightly larger grate of 21.09 sq ft and 111.69 firebox heating surface) arrived in 1893. According to Wikipedia,they were soon found to run "unevenly"and to have slippery drivers. But they must have had redeeming qualities because the railway ordered 30 more.
They had the dimensions shown in the specifications. These arrived as follows:
Year Builder Works numbers
1895 Karlsruhe 1383-94
1899 Esslingen 3057-62
1900 Esslingen 3088-99
[], source of the data, notes that the French railroad Est received 8 locomotives (545, 548, 630, 632, 694, 698, 701, 702 to 4751-4758) after World War I as reparations and the Belgian State system took 546 as B 9900. The rest were surveyed by the new DRG, but were not taken into service.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | VIIIc / 55 61 |
| Locobase ID | 5067 |
| Railroad | Groáherzoglich Badischen Staatseisenbahn (Baden State) |
| Country | Germany |
| Whyte | 0-4-4-0 |
| Number in Class | 32 |
| Road Numbers | 518-519, 538-549, 629-634, 691-702 |
| Gauge | Std |
| Number Built | 32 |
| Builder | several |
| Year | 1893 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.74 / 1.75 |
| Engine Wheelbase (ft / m) | 19.03 / 5.80 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.30 |
| Overall Wheelbase (engine & tender) (ft / m) | 40.35 / 12.30 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 31,967 / 14,500 |
| Weight on Drivers (lbs / kg) | 127,427 / 57,800 |
| Engine Weight (lbs / kg) | 127,427 / 57,800 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 3696 / 14 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 53 / 26.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 49.20 / 1250 |
| Boiler Pressure (psi / kPa) | 188.50 / 1300 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.35" x 23.62" / 390x600 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 23.62" x 23.62" / 600x600 |
| Tractive Effort (lbs / kg) | 25,485 / 11559.82 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.00 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 206 - 2.047" / 52 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 14.11 / 4.30 |
| Firebox Area (sq ft / m2) | 103.94 / 9.66 |
| Grate Area (sq ft / m2) | 20.77 / 1.93 |
| Evaporative Heating Surface (sq ft / m2) | 1451 / 134.85 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1451 / 134.85 |
| Evaporative Heating Surface/Cylinder Volume | 286.81 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3915 |
| Same as above plus superheater percentage | 3915 |
| Same as above but substitute firebox area for grate area | 19,593 |
| Power L1 | 2543 |
| Power MT | 175.99 |