Data from "Baureihe 50.40 " on Alfred Gieseler's Dampfmaschinen und Lokomotiven at [] , last accessed 1 November 2020.from [], last accessed July 2007. See also
Miska tells us that this little batch of rebuilt BR 50s (see Locobase 1294 for the original) used Franco-Crosti waste gas heaters in new boilers to reduce coal consumption by 15%. Unfortunately, the savings were accompanied by a very rapid onset of corrosion in the preheater flues thanks to sulfuric acid. Although some were rebuilt with new boilers and one, 50 4011, was converted to oil firing with positive results, no other BR 50s were converted.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | BR 50 40 |
| Locobase ID | 9596 |
| Railroad | Deutsche Bundesbahn |
| Country | Germany |
| Whyte | 2-10-0 |
| Number in Class | 31 |
| Road Numbers | 50 4001-50 4031 |
| Gauge | Std |
| Number Built | |
| Builder | DB |
| Year | 1955 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 21.65 / 6.60 |
| Engine Wheelbase (ft / m) | 30.18 / 9.20 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.72 |
| Overall Wheelbase (engine & tender) (ft / m) | 61.98 / 18.89 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 33,951 / 15,400 |
| Weight on Drivers (lbs / kg) | 172,842 / 78,400 |
| Engine Weight (lbs / kg) | 199,739 / 90,600 |
| Tender Loaded Weight (lbs / kg) | 134,041 / 60,800 |
| Total Engine and Tender Weight (lbs / kg) | 333,780 / 151,400 |
| Tender Water Capacity (gals / ML) | 6864 / 26 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 9.70 / 9 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 58 / 29 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 55.10 / 1400 |
| Boiler Pressure (psi / kPa) | 232.10 / 1600 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 23.62" x 25.98" / 600x660 |
| Tractive Effort (lbs / kg) | 51,897 / 23540.11 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.33 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 39 - 2.362" / 60 |
| Flues (number - dia) (in / mm) | 24 - 5.984" / 152 |
| Flue/Tube length (ft / m) | 15.42 / 4.70 |
| Firebox Area (sq ft / m2) | 186.15 / 17.30 |
| Grate Area (sq ft / m2) | 32.82 / 3.05 |
| Evaporative Heating Surface (sq ft / m2) | 2082 / 193.50 |
| Superheating Surface (sq ft / m2) | 525 / 48.80 |
| Combined Heating Surface (sq ft / m2) | 2607 / 242.30 |
| Evaporative Heating Surface/Cylinder Volume | 158.02 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 7618 |
| Same as above plus superheater percentage | 9141 |
| Same as above but substitute firebox area for grate area | 51,846 |
| Power L1 | 12,517 |
| Power MT | 798.28 |