Data from Albert H Bone, "Some Recent Designs of Locomotives for Service on Continental Railways", Cassier's Magazine, 1910, pp. 561-609.
This modestly scaled four-cylinder compound design had piston valves on the HP cylinders and Trick or Allen-type slide valves on the LP. The inside, HP cylinders drove on the second axle while the LP cylinders outside drove on the third coupled axle. The valves were all driven from the return crank on the third axle. As the leading truck was radial and the 4th coupled axle had side play, the actual fixed wheelbase was 10 ft 7 15/16" (3.25 m).
The class was rated at 200 tons up 2.6% at 25 km/h (15 mph); their maximum service speed was approximately 40 mph. They worked the Basle-Olten (Hannstein), Domodossola-Iselbe, Lausanne-Vallorbe, and the then-new Simplon routes.
For comparison, see Locobase 2529, which documents the signficantly larger 2-8-0 of the Gotthardbahn.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | C 4/5 |
| Locobase ID | 8948 |
| Railroad | Swiss Federal |
| Country | Switzerland |
| Whyte | 2-8-0 |
| Number in Class | 32 |
| Road Numbers | 2701-2732 |
| Gauge | Std |
| Number Built | 32 |
| Builder | SLM |
| Year | 1906 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 16.57 / 5.05 |
| Engine Wheelbase (ft / m) | 24.61 / 7.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.67 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 32,187 / 14,600 |
| Weight on Drivers (lbs / kg) | 126,986 / 57,600 |
| Engine Weight (lbs / kg) | 146,056 / 66,250 |
| Tender Loaded Weight (lbs / kg) | 86,201 / 39,100 |
| Total Engine and Tender Weight (lbs / kg) | 232,257 / 105,350 |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 53 / 26.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 52.40 / 1330 |
| Boiler Pressure (psi / kPa) | 200.20 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14.57" x 25.2" / 370x640 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 23.62" x 25.2" / 600x640 |
| Tractive Effort (lbs / kg) | 25,169 / 11416.48 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.05 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 242 - 1.969" / 50 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.78 / 4.20 |
| Firebox Area (sq ft / m2) | 161.40 / 15 |
| Grate Area (sq ft / m2) | 27.98 / 2.60 |
| Evaporative Heating Surface (sq ft / m2) | 1883 / 175 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1883 / 175 |
| Evaporative Heating Surface/Cylinder Volume | 387.22 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5602 |
| Same as above plus superheater percentage | 5602 |
| Same as above but substitute firebox area for grate area | 32,312 |
| Power L1 | 3680 |
| Power MT | 255.56 |