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Jb Class
CLASS  Jb    4-8-2


Introduced:  Number in Class: 12

Jb Class Register




Locomotive Specifications

Builder:
  North British, converted to oil burners by NZR

Engine Weight:    68.55 tons Tender Weight:    
40.35 tons
Total Weight:    
108.9 tons
Adhesive Weight:    
44.45 tons
Length over Buffers:    
66' 11"
Total Wheelbase:    58' 0" Engine Wheelbase:    
33' 1"
Coupled Wheelbase:    
14' 3"
Tender Wheelbase:    
15' 10"
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:     Oil Capacity:    1350 gals Water Capacity:    
4000 gals

Remarks:     Twelve 'J' class locomotives were comverted to oilburing and reclassified as Class 'Jb'.
Refer to 'J' class Remarks for details.

Preserved Locomotive
  Mainline Steam Trust,    Wellington -     Jb 1236,     North British #24559/1939