Uganda Railway class M
Uganda 1912 18 produced
In 1912 and 1913, North British delivered a total of 18 0-6-6-0 Mallets to the Uganda Railway. They were of a standard design also built for other metre gauge operators in India, Burma and Spain. They were not superheated and had cylinders with diameters of 15 1/2 and 24 1/4 inches, respectively. Their power was enough to haul 170 tons up a long four percent incline at 6 mph. At only 2.5 percent, they could haul 200 tons at twice the speed. It did not take long until the KUR introduced Garratts which were more powerful and easier on maintenance. So the Mallets were already withdrawn in 1929 and 1930 and scrapped.
Technical data
General
- Built
- 1912-1913
- Manufacturers
- North British
- Wheel arrangement
- 0-6-6-0 (Erie)
- Gauge
- 1,000 mm (Meter gauge)
Dimensions and weights
- Wheelbase
- 7.39 m
- Total wheelbase
- 14.81 m
- Service mass
- 61.3 t
- Adhesion mass
- 61.3 t
- Total mass
- 93.5 t
- Rigid wheelbase
- 2.52 m
- Water capacity
- 9,093 l
- Fuel capacity
- 4.1 t (coal)
Boiler
- Grate area
- 3.066 m²
- Firebox surface
- 10.684 m²
- Tube heating surface
- 129.879 m²
- Evaporative heating surface
- 140.562 m²
- Total heating surface
- 140.6 m²
Power plant
- Driver diameter
- 991 mm
- Boiler pressure
- 12.4 bar
- Expansion type
- compound
- Cylinders
- four, HP: 394 x 508 mm and LP: 616 x 508 mm
Power
- Power source
- steam
- Estimated power
- 597 kW (812 PS)
- Starting effort
- 119.1 kN
- Starting effort simple
- 142.9 kN
Calculated values
- Factor of adhesion
- 1 : 5.05
- Optimal speed
- 31 km/h
- Power-to-weight ratio
- 9.7 kW/t
- Heating Surface Equivalent
- 194.0 m²
- Cylinder volume/HSE
- 1 : 1,417.94
- Adhesive weight/Total
- 1 : 1.00
- Tractive force/Heating surface
- 1 : 17.69
- Grate area/Heating surface
- 1 : 45.85
- Firebox/Tube surface
- 1 : 12.16
