Prag-Duxer Eisenbahn 0-8-0 Locomotives in Austria
Class Details by Steve Llanso of Sweat House Media
Class Klostergrab / 77 (Locobase 8526)
Data from [
], accessed 24 June 2007.
Locobase is not sure what Google actually means when it translates "Klostergrab" as "Monastery Grave". The name actually refers to the town of Klostergrab (Czech Hrob).
In any case, the 77s were smaller versions of the kKStB's much more numerous class 73s (Locobase 1211) and had very small drivers, although they were every bit as powerful. Clearly intended to negotiate tight curves at low speeds, their all-adhesion wheelbase included lateral play in the last axle that reduced the rigid portion to 2.385 m (7 ft 10"). When the PD was absorbed by the kKStB in 1892, this class became the Type 77.
Never straying from their original area of operations in Silesia, the 77s were successively classified as Class 403.2 by the new Czech State Railway in 1918 and 55 71 by the Deutsche Reichsbahn in 1938 only to regain Class 403.2 after the end of World War Two. The last retiree left service in 1955.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Klostergrab / 77 |
| Locobase ID | 8526 |
| Railroad | Prag-Duxer Eisenbahn (PD) (kKStB) |
| Country | Austria |
| Whyte | 0-8-0 |
| Number in Class | 8 |
| Road Numbers | 77.01-08 |
| Gauge | Std |
| Number Built | 8 |
| Builder | Floridsdorf |
| Year | 1884 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.48 / 3.50 |
| Engine Wheelbase (ft / m) | 11.48 / 3.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 33.23 / 10.13 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 114,640 / 52,000 |
| Engine Weight (lbs / kg) | 114,640 / 52,000 |
| Tender Loaded Weight (lbs / kg) | 39,683 / 18,000 |
| Total Engine and Tender Weight (lbs / kg) | 154,323 / 70,000 |
| Tender Water Capacity (gals / ML) | 2112 / 8 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 48 / 24 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 39.40 / 1000 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.5" x 20.47" / 470x520 |
| Tractive Effort (lbs / kg) | 26,299 / 11929.04 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.36 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 118.36 / 11 |
| Grate Area (sq ft / m2) | 21.52 / 2 |
| Evaporative Heating Surface (sq ft / m2) | 1765 / 164 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1765 / 164 |
| Evaporative Heating Surface/Cylinder Volume | 277.15 |
| 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 | 20,595 |
| Power L1 | 4228 |
| Power MT | 325.23 |