Gotthardbahn 4-4-0 Locomotives in Switzerland
Class Details by Steve Llanso of Sweat House Media
Class B/Eb 2/4 (Locobase 5120)
Data from [
], last accessed 19 January 2017, (First viewed August 2002). See also "Report on Locomotives for the St. Gothard [sic] Railway", The Engineer, Volume 54 (17 November 1882), pp. 368-371. Works numbers were 1007-1012 in 1882.
These Eight-wheeler tanks ran up to the end of steam on the GB, retiring in 1927.
Class Ea 2/4 (Locobase 5121)
Data from [], last accessed 19 January 2017, (First viewed August 2002). Works numbers were 1548-1550 in 1890.
Larger versions of the 1882 tanks described in Locobase 5120, the boilers offered a bit more steam at higher pressure. The big difference, however, was the adoption of much taller drivers.
These engines retired in 1923.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | B/Eb 2/4 | Ea 2/4 |
| Locobase ID | 5120 | 5121 |
| Railroad | Gotthardbahn | Gotthardbahn |
| Country | Switzerland | Switzerland |
| Whyte | 4-4-0T | 4-4-0T |
| Number in Class | 6 | 3 |
| Road Numbers | 25-30 | 31-33 |
| Gauge | Std | Std |
| Number Built | 6 | 3 |
| Builder | Krauss | Maffei |
| Year | 1882 | 1890 |
| Valve Gear | Allan | |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 6.89 / 2.10 | 7.87 / 2.40 |
| Engine Wheelbase (ft / m) | 20.67 / 6.30 | 21.33 / 6.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.33 | 0.37 |
| Overall Wheelbase (engine & tender) (ft / m) | 20.67 / 6.30 | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 61,729 / 28,000 | 68,784 / 31,200 |
| Engine Weight (lbs / kg) | 102,515 / 46,500 | 120,813 / 54,800 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | 102,515 / 46,500 | 120,813 / 54,800 |
| Tender Water Capacity (gals / ML) | 1420 / 5.38 | 1531 / 5.80 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.20 / 2 | 2.50 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 51 / 25.50 | 57 / 28.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 62.20 / 1580 | 73.60 / 1870 |
| Boiler Pressure (psi / kPa) | 145 / 1000 | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.14" x 24.09" / 410x612 | 16.14" x 24.02" / 410x610 |
| Tractive Effort (lbs / kg) | 12,435 / 5640.43 | 12,574 / 5703.48 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.96 | 5.47 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 150 - 2.008" / 51 | 160 - 1.969" / 50 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 13.19 / 4.02 | 12.99 / 3.96 |
| Firebox Area (sq ft / m2) | 78.58 / 7.30 | 83.96 / 7.80 |
| Grate Area (sq ft / m2) | 15.07 / 1.40 | 17.22 / 1.60 |
| Evaporative Heating Surface (sq ft / m2) | 1115 / 103.60 | 1155 / 107.34 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 1115 / 103.60 | 1155 / 107.34 |
| Evaporative Heating Surface/Cylinder Volume | 195.46 | 203.06 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 2185 | 2996 |
| Same as above plus superheater percentage | 2185 | 2996 |
| Same as above but substitute firebox area for grate area | 11,394 | 14,609 |
| Power L1 | 3973 | 5909 |
| Power MT | 283.79 | 378.78 |