Sachsische 2-4-0 Locomotives in Germany
Class Details by Steve Llanso of Sweat House Media
Class VIb V / BR 34.8 (Locobase 14735)
Data from . See also Wikipedia's entry on the VIb V at [
] and Christian Lindecke's website and [].
These short-coupled express engines resulted from a trial of the Afrika, a prototype the von Borries system of cross-compounding. Like the Prussian S1 of the same period, the Afrika's cylinders were placed behind the lead truck and drove on the rear axle. Unlike the S1s, which used outside Walschaert gear, the VIb was fitted with Allan straight-link motion inside.
When tested against the 735, a simple-expansion duplicate, the Afrika burned 20% less coal.
Twelve more compounds appeared in 1888 (6) and 1890 (6). All were named for African locations (Port Said, Kamerun, etc.). They remained in service until 1922-1925. Only one was given a DRG BauReihe class ID.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | VIb V / BR 34.8 |
| Locobase ID | 14735 |
| Railroad | Sachsische |
| Country | Germany |
| Whyte | 2-4-0 |
| Number in Class | 14 |
| Road Numbers | 161-174/BR 34 8011 |
| Gauge | Std |
| Number Built | 14 |
| Builder | Hartmann |
| Year | 1886 |
| Valve Gear | Allan |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13.12 / 4 |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 32.97 / 10.05 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 29,983 / 14,600 |
| Weight on Drivers (lbs / kg) | 64,375 / 29,200 |
| Engine Weight (lbs / kg) | 93,476 / 42,400 |
| 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) | 6.60 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 54 / 27 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 74.20 / 1885 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17.32" x 22.05" / 440x560 (1) |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 25.59" x 22.05" / 650x560 (1) |
| Tractive Effort (lbs / kg) | 9042 / 4101.39 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 7.12 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 75.35 / 7 |
| Grate Area (sq ft / m2) | 19.59 / 1.82 |
| Evaporative Heating Surface (sq ft / m2) | 1055 / 98 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1055 / 98 |
| Evaporative Heating Surface/Cylinder Volume | 350.92 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3409 |
| Same as above plus superheater percentage | 3409 |
| Same as above but substitute firebox area for grate area | 13,111 |
| Power L1 | 4694 |
| Power MT | 321.51 |