Pommern KB Articulated Locomotives in Germany
Class Details by Steve Llanso of Sweat House Media
Class Type ii PKP-Baureihe Tx7 (Locobase 8051)
Data from [
], accessed 1 January 2007.
Hanomag's small Mallets were very similar to an Orenstein & Koppel design (and to the Vulkan's described in Locobase 8050), but they featured the Heusinger radial valve gear.
Over a two-year period, the builder delivered its engines as follows:
Franzburger Kreisbahnen (9) (works number 6997 in 1911)
Greifenberger Kleinbahn (17-18 ) (works numbers 6420 and 6535 in 1912)
Kolberger Kleinbahn (8-9) (works numbers 6100 in 1912 and 6773 in 1913)
Regenwalder Kleinbahnen (11) (works number 7113 in 1913 in 1912)
Saatziger Kleinbahnen (works number 6419 in 1911) which in 1925 became the KKB's 10).
All were "drafted" in 1914-1917 by the German Army's Heeresfeldbahnen, where they remained until retirement. Only the ex-Saatziger engine lasted as long as the Second World War and it endured until 1957.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Type ii PKP-Baureihe Tx7 |
| Locobase ID | 8051 |
| Railroad | Pommern KB |
| Country | Germany |
| Whyte | 0-4-4-0T |
| Number in Class | 7 |
| Road Numbers | |
| Gauge | Metre |
| Number Built | 7 |
| Builder | Hanomag |
| Year | 1911 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 3.61 / 1.10 |
| Engine Wheelbase (ft / m) | 12.96 / 3.95 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.28 |
| Overall Wheelbase (engine & tender) (ft / m) | 12.96 / 3.95 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 12,125 / 5500 |
| Weight on Drivers (lbs / kg) | 48,502 / 22,000 |
| Engine Weight (lbs / kg) | 48,502 / 22,000 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 48,502 / 22,000 |
| Tender Water Capacity (gals / ML) | 660 / 2.50 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 20 / 10 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 29.50 / 720 |
| 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) | 6.25 |
| 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) | 7.53 / 0.70 |
| Evaporative Heating Surface (sq ft / m2) | 384 / 35.70 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 384 / 35.70 |
| Evaporative Heating Surface/Cylinder Volume | 379.77 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1310 |
| Same as above plus superheater percentage | 1310 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |