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N Class
CLASS  N    2-6-2


Introduced: 1885 Number in Class: 12

N Class Register





Locomotive Specifications

Builder:
  Baldwin Locomotive Works, Philadelphia, USA

Engine Weight:    
29.2 tons
Tender Weight:    
16.0 tons
Total Weight:    45.2 tons Adhesive Weight:    
21.0 tons
Length over Buffers:    
49' 2"
Total Wheelbase:    42' 4" Engine Wheelbase:    23' 2" Coupled Wheelbase:    
9' 6"
Tender Wheelbase:    
12' 8"
Driver Wheel Dia.:    49" Cylinders HP:    
Two - 15" x 20"
Cylinders LP:    
Grate Area:    16.0 sq ft Evaporative Area:    
853 sq ft
Superheated Area:     Working Pressure:    
130 psig
Tractive Effort:    
9551 lbs f
Coal Capacity:    1.8 tons Oil Capacity:     Water Capacity:    
1300 gals

Remarks:    Placed into service in 1885, these locomotives were assigned to express trains running between Christchurch and Dunedin. At the time they were the largest and finest passenger engines in the country. An interesting feature was the fitting of Westinghouse air-brakes on the engine, even though this was not adopted on the NZR until the turn of the century. N27 was rebuilt in 1895 at Addington with a Belpaire firebox and Vauclain cylinders, HP 9" x 20", LP 16" x 20". Boiler pressure was 180 psig and tractive effort 8,720 lbs f. Baldwin (6) in 1885, (4) in 1901 these were 200 psi, 16.3 grate, 907 heating, 54.2 tons total, 23.0 adhesive, 14,6500 TE. WMRC (#'s 9, 10) taken over by NZR 1908; 140 psi, 16.3 grate, 907 heating, 50.7 total tons, 21.9 adhesive, 10,260 TE