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South African class MJ1
South Africa | 1918
8 produced
No. 1673
No. 1673
collection Frank Holland
Variantas builtrebuilt
General
Built19181939
ManufacturerMontreal Locomotive Works
Axle config2-6-6-0 (Mogul Mallet) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length68 ft 7 1/8 in
Wheelbase32 ft 8 in
Rigid wheelbase8 ft 4 in
Total wheelbase60 ft 8 1/4 in
Service weight198,240 lbs
Adhesive weight181,440 lbs
Total weight312,040 lbs
Axle load31,584 lbs
Water capacity5,104 us gal
Fuel capacity22,400 lbs (coal)
Boiler
Grate area40 sq ft
Firebox area136 sq ft133 sq ft
Tube heating area1,906 sq ft1,780 sq ft
Evaporative heating area2,042 sq ft1,913 sq ft
Superheater area413 sq ft350 sq ft
Total heating area2,455 sq ft2,263 sq ft
Variantas builtrebuilt
Power Plant
Driver diameter42.5 in42.8 in
Boiler pressure200 psi
Expansion typecompound
Cylindersfour, HP: 16 1/2 x 24 in
and LP: 26 x 24 in
Power
Power sourcesteam
Estimated power1,300 hp (969 kW)1,250 hp (932 kW)
Optimal speed22 mph
Starting effort37,264 lbf37,046 lbf
with start valve44,717 lbf44,455 lbf
Calculated Values
steam locomotive
passenger
freight
Mallet
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