São Paulo Railway I 60 to 69
The British-controlled São Paulo Railway procured ten Consolidation freight locomotives in 1909, designed by chief engineer Charles H. Fox and manufactured by the North British Locomotive Company in Glasgow. Originally, they had got non-continuous numbers between 6 and 91. Later they were renumbered I 60 to I 69.
The tracks, which were very good by South American standards, allowed a heavy locomotive with an axle load of 16 and a half tons. Thus, a generously dimensioned boiler with Belpaire firebox is evident at the first glance. A Schmidt-type superheater was used, which was not standard on British locomotives at the time. Likewise, they had a steam reverser and there were special bypass valves between the cylinders, which reduced the back pressure when coasting with the regulator closed.
Technical data
General
- Built
- 1909
- Manufacturers
- North British
- Wheel arrangement
- 2-8-0 (Consolidation)
- Gauge
- 1,600 mm (Irish broad gauge)
Dimensions and weights
- Wheelbase
- 7.32 m
- Total wheelbase
- 14.45 m
- Service mass
- 75.9 t
- Adhesion mass
- 67.2 t
- Total mass
- 111.9 t
- Rigid wheelbase
- 4.95 m
- Axle load
- 16.8 t
- Water capacity
- 13,639 l
- Fuel capacity
- 4.1 t (coal)
Boiler
- Grate area
- 2.648 m²
- Firebox surface
- 14.307 m²
- Tube heating surface
- 130.993 m²
- Evaporative heating surface
- 145.3 m²
- Superheater surface
- 34.699 m²
- Total heating surface
- 180.0 m²
Power plant
- Driver diameter
- 1,372 mm
- Boiler pressure
- 14.1 bar
- Expansion type
- simple expansion
- Cylinders
- two, 546 x 660 mm
Power
- Power source
- steam
- Estimated power
- 858 kW
- Starting effort
- 172.5 kN
Calculated values
- Factor of adhesion
- 1 : 3.82
- Optimal speed
- 31 km/h
- Power-to-weight ratio
- 11.3 kW/t
- Heating Surface Equivalent
- 286.2 m²
- Cylinder volume/HSE
- 1 : 1,080.82
- Adhesive weight/Total
- 1 : 1.13
- Tractive force/Heating surface
- 1 : 20.02
- Grate area/Heating surface
- 1 : 67.98
- Firebox/Tube surface
- 1 : 9.16
- Total/Superheater
- 1 : 4.19
