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Introduced: 1946
Number in Class: 51
Photo : Mainline Steam
Locomotive Specifications
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2. North British Locomotive Works, Glasgow, Scotland (16) |
| Engine Weight: 69.1 tons | Tender Weight: 40.35 tons |
Total Weight: 109.45 tons |
Adhesive Weight: 44.75 tons |
| Length over Buffers: 66' 11½" |
Total Wheelbase: 58' 0" | Engine Wheelbase: 33' 1½" |
Coupled Wheelbase: 14' 3" |
| Tender Wheelbase: 15' 10½" |
Driver Wheel Dia.: 54" | Cylinders HP: Two - 18" x 26" |
Cylinders LP: |
| Grate Area: 39.0 sq ft | Evaporative Area: 1469 sq ft |
Superheated Area: 283 sq ft |
Working Pressure: 200 psig |
| Tractive Effort: 24960 lbs f |
Coal Capacity: 6.0 tons | Oil Capacity: | Water Capacity: 4000 gals |
| Remarks: Unlike the 'J's, the 'Ja's were built without streamlining. At the outset they were fitted with cross-compound air compressors, and most were equipped with roller bearings on all excpet one pair of crank pins. These locomotives became the mainstay of South Island operations and were rated to haul 1000 ton freight and 400 ton passenger trains on easy grades. Sixteen North British 'Ja's were built as oil-burners, and 35 built by NZR Hillside 1946-56 with similar data to 'J' class. 'Ja's were originally classified as a NZ built 'J' but an additional 16 were ordered from and supplied by North British. Both 'J' and 'Ja' classes were very successful engines fitting in between the 'Ab' and the 'K'. |
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Glenbrook Vintage Railway, Auckland - Ja 1250, Dubs #656 Operating Plains railway, Tinwald - Ja 1260, Dubs #656 Waikato Railway Museum, Te Awamutu - Ja 1267, Dubs #656 Stored Steam Incorporated, Paekakariki - Ja 1271, Dubs #656 Operating Otago Settlers Museum, Dunedin - Ja 1274, Dubs #656 Display Mainline Steam, Auckland - Ja 1275, Dubs #656 |
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