Data from "Compound Ten-Coupled Loco, Austrian State Rys," The Locomotive Magazine, Vol XII (14 April 1906), p. 63. See also Dr. R. Sanzin, "Die Lokomotiven auf der Intertionalen Austellung in Mailand 1906, 31. 5/6 gekuppelte zweizylindrige Verbund-Gebirgszuglokomotive der oesterreichischen Staatsbahnen ...", Zeitschrift des Oesterreichischen Ingenieur- und Architeckten-Vereines Nr. 12 (22 March1907), pp. 209-210.
Karl Goldsdorf designed these six-axled helper locomotives to assist passenger trains over the mountain fastnesses. The route had bridges that were relatively fragile and not capable of supporting heavy loads. Hence the need for so many axles. The design had some hefty pulling power, being able to haul 280 tons up a 2.6% grade at 32 km/h. The Sndbahn ordered 2 engines in this class in 1908 and 3 in 1911; these went to the Italian State Railways as war reparations in 1918 and designated Gruppo 478. Unfortunately the Clench superheater was not very effective and the advent of the Schmidt superheater led to the supercession of this small class by other classes.
Data from "kkStB 380", Wikipedia, [], last accessed 23 June 2009.
Principal Dimensions by Steve Llanso of Sweat House Media | ||
---|---|---|
Class | 280 | 380 |
Locobase ID | 10554 | 10555 |
Railroad | kKStB | kKStB |
Country | Austria | Austria |
Whyte | 2-10-0 | 2-10-0 |
Number in Class | 8 | 28 |
Road Numbers | 280.001-280.003 | 380.01-02, 380.100-125 |
Gauge | Std | Std |
Number Built | 8 | 28 |
Builder | StEG | StEG |
Year | 1905 | 1909 |
Valve Gear | Heusinger | Walschaert |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 16.44 / 5.01 | 16.44 / 5.01 |
Engine Wheelbase (ft / m) | 28.44 / 8.67 | 28.44 / 8.67 |
Ratio of driving wheelbase to overall engine wheelbase | 0.58 | 0.58 |
Overall Wheelbase (engine & tender) (ft / m) | ||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 30,424 / 13,800 | 30,865 / 14,000 |
Weight on Drivers (lbs / kg) | 148,591 / 67,400 | 154,323 / 70,000 |
Engine Weight (lbs / kg) | 170,197 / 77,200 | 194,249 / 88,110 |
Tender Loaded Weight (lbs / kg) | 114,640 / 52,000 | |
Total Engine and Tender Weight (lbs / kg) | 308,889 / 140,110 | |
Tender Water Capacity (gals / ML) | 2561 / 9.70 | 7656 / 29 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 | 5.50 / 5 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 50 / 25 | 51 / 25.50 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 57.10 / 1450 | 55.50 / 1410 |
Boiler Pressure (psi / kPa) | 232.10 / 16 | 232.10 / 16 |
High Pressure Cylinders (dia x stroke) (in / mm) | 14.57" x 28.35" / 370x720 | 15.35" x 28.35" / 390x720 |
Low Pressure Cylinders (dia x stroke) (in / mm) | 24.8" x 28.35" / 630x720 | 24.8" x 28.35" / 630x720 |
Tractive Effort (lbs / kg) | 30,916 / 14023.28 | 34,336 / 15574.57 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.81 | 4.49 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 291 - 1.89" / 48 | 164 - 2.008" / 51 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 16.40 / 5 | |
Firebox Area (sq ft / m2) | 166.84 / 15.50 | 166.78 / 15.50 |
Grate Area (sq ft / m2) | 49.51 / 4.60 | 49.50 / 4.60 |
Evaporative Heating Surface (sq ft / m2) | 2100 / 195.10 | 2067 / 192.10 |
Superheating Surface (sq ft / m2) | 678 / 63 | 532 / 49.40 |
Combined Heating Surface (sq ft / m2) | 2778 / 258.10 | 2599 / 241.50 |
Evaporative Heating Surface/Cylinder Volume | 383.86 | 340.40 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 11,491 | 11,489 |
Same as above plus superheater percentage | 14,249 | 13,787 |
Same as above but substitute firebox area for grate area | 48,017 | 46,452 |
Power L1 | 12,593 | 10,415 |
Power MT | 934.20 | 743.93 |