South Manchurian Railway No. 701 to 712
Manchuria 1918 12 produced
These twelve Mikados were built by Baldwin in 1918 for express freight service. They were classified by Baldwin as type 12-38 ¼ E, what stands for twelve wheels, eight of these powered, trucks in the front and rear, and a cylinder diameter of 22 inches. Designed for rails of 80 pounds per yard, they had an axle load of less than 40,000 pounds, making them some of the smaller standard-gauge Mikados built by Baldwin. For service in express freight service, their drivers measured 57 inches, what was a bit larger than the 54 inches of the other Mikados of the Mantetsu. They shared many similarities with the Pacifics 901 to 912 which were built two years later by the same manufacturer.
Technical data
General
- Built
- 1918
- Manufacturers
- Baldwin
- Wheel arrangement
- 2-8-2 (Mikado)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Wheelbase
- 9.65 m
- Total wheelbase
- 19.22 m
- Service mass
- 89.8 t
- Adhesion mass
- 69.9 t
- Total mass
- 144.2 t
- Rigid wheelbase
- 4.57 m
- Axle load
- 17.5 t
- Water capacity
- 22,712 l
- Fuel capacity
- 12.7 t (coal)
Boiler
- Grate area
- 4.339 m²
- Firebox surface
- 17.466 m²
- Tube heating surface
- 221.76 m²
- Evaporative heating surface
- 239.226 m²
- Superheater surface
- 56.857 m²
- Total heating surface
- 296.1 m²
Power plant
- Driver diameter
- 1,448 mm
- Boiler pressure
- 12.8 bar
- Expansion type
- simple expansion
- Cylinders
- two, 559 x 711 mm
Power
- Power source
- steam
- Starting effort
- 166.3 kN
Calculated values
- Factor of adhesion
- 1 : 4.12
- Heating Surface Equivalent
- 440.3 m²
- Cylinder volume/HSE
- 1 : 792.33
- Adhesive weight/Total
- 1 : 1.29
- Tractive force/Heating surface
- 1 : 11.73
- Grate area/Heating surface
- 1 : 68.24
- Firebox/Tube surface
- 1 : 12.70
- Total/Superheater
- 1 : 4.21