Franzburger Kreisbahnen Articulated Locomotives in Germany
Class Details by Steve Llanso of Sweat House Media
Class 7 / 99.562 (Locobase 8050)
Data from [
], accessed 1 January 2007, supplemented by [], last accessed 12 May 2011. Works numbers were 2008 in 1902 and 2652 in 1910.
The first of these two small Mallets went into service in 1902. Although small, the design proved adequate for the job and a second one was ordered in 1910.
For almost all of the next 40 years the two loks ran on the FKB. In 1949, that railway was absorbed by the newly formed East German Deutsche Reichsbahn and the two engines were renumbered 99 5621-5622. The first was retired in 1967, the latter in 1969.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 7 / 99.562 |
| Locobase ID | 8050 |
| Railroad | Franzburger Kreisbahnen (FKB) |
| Country | Germany |
| Whyte | 0-4-4-0T |
| Number in Class | 2 |
| Road Numbers | 7-8/99 5621-5622 |
| Gauge | Metre |
| Number Built | 2 |
| Builder | Vulkan |
| Year | 1902 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12.80 / 3.90 |
| Engine Wheelbase (ft / m) | 12.80 / 3.90 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 12.80 / 3.90 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 11,023 / 5000 |
| Weight on Drivers (lbs / kg) | 45,415 / 20,600 |
| Engine Weight (lbs / kg) | 45,415 / 20,600 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 45,415 / 20,600 |
| Tender Water Capacity (gals / ML) | 528 / 2 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.70 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 19 / 9.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 29.50 / 750 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 8.86" x 14.17" / 225x360 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 13.39" x 14.17" / 340x360 |
| Tractive Effort (lbs / kg) | 7757 / 3518.52 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.85 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 7.85 / 0.73 |
| Evaporative Heating Surface (sq ft / m2) | 376 / 34.90 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 376 / 34.90 |
| Evaporative Heating Surface/Cylinder Volume | 371.86 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1366 |
| Same as above plus superheater percentage | 1366 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |