Jb Class

Jb Class CLASS Jb 4-8-2

Introduced: Number in Class: 12

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' 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:     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

Engine Weight: 68.55 tons	Tender Weight: 40.35 tons	Total Weight: 108.9 tons	Adhesive Weight: 44.45 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:	Oil Capacity: 1350 gals	Water Capacity: 4000 gals