Data from Christian Lindecke's website [] (visited 28 Nov 2003). Additional data from US Military Railway Service Equipment Data Book -- German Locomotives supplied by Allen Stanley from his extensive Rail Data Exchange in March 2004
The dozen tanks were designed to run at 80 km/h (50 mph) in either direction. A Krauss-Helmholz truck linked the carrying axle and the first coupled axle; the second coupled axle was the drive axle.
Before long the class was equipped with the Pielock superheater (see Locobase 13565 for a detailed description of this unit). This design proved unsatisfactory and the class was retrofitted with the Schmidt version in 1925. Locobase 5755 shows the later superheated locomotives which, other than a slightly larger boiler, had very similar dimensions.
Nine were still operational after World War II, most being sold off to private railways. The last DB engine left service on 14 November 1951.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | P5 // BR 77.0 |
Locobase ID | 5754 |
Railroad | Pfalzbahn |
Country | Germany |
Whyte | 2-6-4T |
Number in Class | 12 |
Road Numbers | 310-321 / BR 77 001- BR 77 012 |
Gauge | Std |
Number Built | 12 |
Builder | Krauss |
Year | 1908 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 11.82 / 3.60 |
Engine Wheelbase (ft / m) | 30.85 / 9.40 |
Ratio of driving wheelbase to overall engine wheelbase | 0.38 |
Overall Wheelbase (engine & tender) (ft / m) | 30.85 / 9.40 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 35,715 / 16,200 |
Weight on Drivers (lbs / kg) | 105,822 / 48,000 |
Engine Weight (lbs / kg) | 202,825 / 92,000 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | 202,825 / 92,000 |
Tender Water Capacity (gals / ML) | |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 59 / 29.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 59.10 / 1501 |
Boiler Pressure (psi / kPa) | 203.10 / 1400 |
High Pressure Cylinders (dia x stroke) (in / mm) | 19.69" x 22.05" / 500x560 |
Tractive Effort (lbs / kg) | 24,971 / 11326.67 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.24 |
Heating Ability | |
Tubes (number - dia) (in / mm) | |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 13.12 / 4 |
Firebox Area (sq ft / m2) | 107 / 9.94 |
Grate Area (sq ft / m2) | 25.18 / 2.34 |
Evaporative Heating Surface (sq ft / m2) | 1499 / 139.31 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1499 / 139.31 |
Evaporative Heating Surface/Cylinder Volume | 192.90 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 5114 |
Same as above plus superheater percentage | 5114 |
Same as above but substitute firebox area for grate area | 21,732 |
Power L1 | 5236 |
Power MT | 327.25 |