Saxon State 2-4-2 Locomotives in Germany
Class Details by Steve Llanso of Sweat House Media
Class IV T / BR 71.3 (Locobase 11211)
Data from
[
], last accessed 14 April 2010, supplemented by [], last accessed 14 May 2011. (Thanks to Claus Gaertner for his 17 March 2021 email providing the proper transliteration of the builder's name.)
Based on the Prussian T5 (Locobase 2136), this large class of passenger tanks had taller drivers. Given the greater propensity for unsteadiness of a 2-4-2 locomotive, it's likely that the bigger wheels contributed to difficulties in running these IV Ts at high speed. Indeed, their initial use was marred by derailments.
Wikipedia expresses surprise that 1727, involved in a serious wreck on 14 December 1913, was repaired and indeed ran for several decades.
By the time the DRG took over the class, there were 85 left. Attrition of all kinds left the Bundesbahn with 9 in 1945, the last of which was retired in 1955.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | IV T / BR 71.3 |
| Locobase ID | 11211 |
| Railroad | Saxon State |
| Country | Germany |
| Whyte | 2-4-2T |
| Number in Class | 91 |
| Road Numbers | 1701-1791 / 71 301-71 385 |
| Gauge | Std |
| Number Built | 91 |
| Builder | Saechsische Maschinenfabrik |
| Year | 1897 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 22.31 / 6.80 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 22.31 / 6.80 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 33,951 / 15,400 |
| Weight on Drivers (lbs / kg) | 65,918 / 29,900 |
| Engine Weight (lbs / kg) | 124,120 / 56,300 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 124,120 / 56,300 |
| Tender Water Capacity (gals / ML) | 1980 / 7.50 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.20 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 55 / 27.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 62.60 / 1590 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.93" x 23.62" / 430x600 |
| Tractive Effort (lbs / kg) | 15,995 / 7255.22 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.12 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 171 - 1.772" / 45 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.12 / 4 |
| Firebox Area (sq ft / m2) | 86.83 / 8.07 |
| Grate Area (sq ft / m2) | 16.79 / 1.56 |
| Evaporative Heating Surface (sq ft / m2) | 1011 / 93.98 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1011 / 93.98 |
| Evaporative Heating Surface/Cylinder Volume | 164.28 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2921 |
| Same as above plus superheater percentage | 2921 |
| Same as above but substitute firebox area for grate area | 15,108 |
| Power L1 | 4263 |
| Power MT | 285.15 |