Introduced: 1908
Number in Class: 18
Locomotive Specifications
|
Converted NZR Hutt and NZR Hillside (1) |
| Engine Weight: 66.7 tons |
Tender Weight: 27.3 tons | Total Weight: 94.0 tons | Adhesive Weight: 46.7 tons |
| Length over Buffers: 56' 9 3/4" |
Total Wheelbase: 48' 6 3/8" |
Engine Wheelbase: 28' 7" | Coupled Wheelbase: 13' 6" |
| Tender Wheelbase: 12' 9 3/4" |
Driver Wheel Dia.: 45" | Cylinders HP: Two - 13½" x 22" |
Cylinders LP: Two - 22" x 22" |
| Grate Area: 37.1 sq ft | Evaporative Area: 2066 sq ft |
Superheated Area: | Working Pressure: 230 psig |
| Tractive Effort: 26620 lbs f |
Coal Capacity: 4.0 tons | Oil Capacity: | Water Capacity: 2200 gals |
Locomotive Specifications after Rebuild (1943-1949)
| Engine Weight: 66.6 tons | Tender Weight: 28.55 tons |
Total Weight: 95.15 tons | Adhesive Weight: 45.6 tons |
| Length over Buffers: 56' 9 3/4" |
Total Wheelbase: 48' 6 3/8" |
Engine Wheelbase: 28' 7" |
Coupled Wheelbase: 13' 6" |
| Tender Wheelbase: 12' 9 3/4" | Driver Wheel Dia.: 45" | Cylinders HP: Four - 13½" x 22" |
Cylinders LP: |
| Grate Area: 37.5 sq ft | Evaporative Area: 1185 sq ft |
Superheated Area: 168 sq ft |
Working Pressure: 215 psig |
| Tractive Effort: 29500 lbs f |
Coal Capacity: 5.0 tons | Oil Capacity: | Water Capacity: 2200 gals |
| Remarks: One of New Zealand's largest and most powerful locomotives, the 'X' class was designed for use on the heavy North Island Main Trunk gradients. It was probably also the first 4-8-2 or "Mountain" type in the world. Conceived as a four cylinder de Glehn compound, eleven were rebuilt as four-cylinder simple engines in 1945-1951. The boiler pressure of 250 lb sq in. was the highest ever carried in New Zealand by a locomotive with an orthodox boiler. Starting tractive effort of 31,150 lb f. |
|
|
