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G Lass 4-4-0 ST
CLASS  G    4-4-0 ST

Introduced: 1873 Number in Class: 4

G Class Register

Locomotive Specifications

  Black, Hawthorn & Co., Gateshead-on-Tyne, England

Engine Weight:    
18.2 tons
Tender Weight:     Total Weight:    18.2 tons Adhesive Weight:    
13.2 tons
Length over Buffers:     Total Wheelbase:    15' 0" Engine Wheelbase:    15' 0" Coupled Wheelbase:    
5' 6"
Tender Wheelbase:     Driver Wheel Dia.:    36" Cylinders HP:    
Two - 10" x 18"
Cylinders LP:    
Grate Area:    9.0 sq ft Evaporative Area:    
485 sq ft
Superheated Area:     Working Pressure:    
130 psig
Tractive Effort:    
5733 lbs f
Coal Capacity:    0.6 tons Oil Capacity:     Water Capacity:    
500 gals

Remarks:    The 'G', designed as a passenger version of the 'F' class, shares the same boiler, cylinder and coupled wheel dimensions as the 'F' class. Due to their wheel arrangement, adhesive weight had to be lessened for steadier riding on curves, as a result of which the 'G' could not haul loads anything like those of the 'F' class. Owing to their limited adhesion, they were never very popular, but they could run fast with light loads. For many years they performed reasonably well on the isolated Picton section before being replaced with more powerful locomotives.