Teresópolis Railway No. 21
Brazil 1923 1 produced
On its 40 km line from the port near Rio de Janeiro to Teresópolis, the Estrada de Ferro de Teresópolis had a 10 km section with the Riggenbach rack system and a gradient of up to 15 percent. For this section, the Swiss SLM built a rack locomotive in 1923 that got the running number 21.
It had two carrying axles in the frame with the rack drive between them. The two rack wheels were connected to the cylinders with a gear ratio of 1 to 2.21. At the rear end there was an additional Bissel axle. The boiler was inclined to match the average gradient of the track and to ensure an even water level.
Technical data
General
- Built
- 1923
- Manufacturers
- SLM
- Wheel arrangement
- 4-0-2RT (Riggenbach)
- Gauge
- 1,000 mm (Meter gauge)
Dimensions and weights
- Empty mass
- 21.5 t
- Service mass
- 28.3 t
- Adhesion mass
- 0 t
- Water capacity
- 3,700 l
- Fuel capacity
- 0.8 t (coal)
Boiler
- Grate area
- 1.4 m²
- Firebox surface
- 5.8 m²
- Tube heating surface
- 48.84 m²
- Evaporative heating surface
- 54.64 m²
- Superheater surface
- 16.48 m²
- Total heating surface
- 71.1 m²
Power plant
- Boiler pressure
- 13 bar
- Expansion type
- simple expansion
- Cylinders
- two, 380 x 460 mm
Power
- Power source
- steam
- Estimated power
- 325 kW (442 PS)
- Starting effort
- 117.7 kN
Calculated values
- Power-to-weight ratio
- 11.5 kW/t
- Heating Surface Equivalent
- 116.6 m²
- Cylinder volume/HSE
- 1 : 894.84
- Tractive force/Heating surface
- 1 : 34.56
- Grate area/Heating surface
- 1 : 50.80
- Firebox/Tube surface
- 1 : 8.42
- Total/Superheater
- 1 : 3.32
