Introduced: 1910
Number in Class: 20
Locomotive Specifications
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| Engine Weight: 50.0 tons | Tender Weight: | Total Weight: 50.0 tons | Adhesive Weight: 29.7 tons |
| Length over Buffers: 36' 10¼" |
Total Wheelbase: 29' 7½" | Engine Wheelbase: 29' 7½" | Coupled Wheelbase: 10' 0" |
| Tender Wheelbase: | Driver Wheel Dia.: 45" | Cylinders HP: Two - 14" x 22" |
Cylinders LP: |
| Grate Area: 16.9 sq ft | Evaporative Area: 738 sq ft |
Superheated Area: | Working Pressure: 200 psig |
| Tractive Effort: 15330 lbs f |
Coal Capacity: 2.0 tons | Oil Capacity: | Water Capacity: 1400 gals |
| Remarks: These engines were designed to meet the need for a more powerful locomotive to haul suburban trains at Auckland and Wellington. They had a decided family likeness to the 'Wf' and were indeed an improved version with cylinders of the same dimensions, coupled wheels of the same diameter, and the same working pressure and tractive effort. With greater adhesion weight and larger water tanks, the 'Wg' was a useful engine and the class saw much main-line service as well as suburban work. Fitted with a "Coles" trailing truck. Ten were altered to 'Ww' old style, four rebuilt with high pitched boiler to 'Ww' style, and eight were superheated. |
