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Na Class
CLASS  Na    2-6-2


Introduced:    1894 Number in Class:    2


Na Class Register






Locomotive Specifications

Builder:
  Baldwin Locomotive Works, Philadelphia, USA

Engine Weight:    
35.4 tons
Tender Weight:    
19.1 tons
Total Weight:    54.5 tons Adhesive Weight:    
25.2 tons
Length over Buffers:    
50' 10"
Total Wheelbase:    42' 10" Engine Wheelbase:    23' 2" Coupled Wheelbase:    
10' 1"
Tender Wheelbase:    
12' 9"
Driver Wheel Dia.:    49" Cylinders HP:    
Two - 10" x 20"
Cylinders LP:    
Two - 17" x 20"
Grate Area:    16.7 sq ft Evaporative Area:    
957 sq ft
Superheated Area:     Working Pressure:    
180 psig
Tractive Effort:    
9700 lbs f
Coal Capacity:    3.0 tons Oil Capacity:     Water Capacity:    
1500 gals

Remarks:     The Wellington and Manawatu Railway Company, in 1894, ordered a 2-6-2 "Prairie" locomotive fitted with Vauclain compound cylinders. Having a larger boiler than its 'N' cousin, it was also a heavier locomotive. operated over the Paekakariki-Longburn section, the engine proved a good performer and showed a "marked saving in steam" when compared with a simple locomotive. W&MRC orded a further similar engine in 1897, but this locomotive was slightly heavier tha the earlier machine. The Government took them over in 1908 and by 1929 they were worn out.
Ex Wellington & Manawatu Railway Co. #'s 14, 15

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