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Clayton Class D
CLASS  D    0-4-0 T : (Clayton)

Introduced: 1929 Number in Class: 1

D Class Register

Locomotive Specifications

Clayton Wagons Ltd., Lincoln, England

Engine Weight:    25.7 tons Tender Weight:     Total Weight:    25.7 tons Adhesive Weight:    

25.7 tons
Length over Buffers:    
22' 3"
Total Wheelbase:    9' 0" Engine Wheelbase:    9' 0" Coupled Wheelbase:    
9' 0"
Tender Wheelbase:     Driver Wheel Dia.:    42" Cylinders HP:    
Four - 7" x 10"
Cylinders LP:    
Grate Area:    12.5 sq ft Evaporative Area:    
320 sq ft
Superheated Area:    65 sq ft Working Pressure:    
300 psig
Tractive Effort:    5600 lbs f Coal Capacity:    0.5 tons Oil Capacity:     Water Capacity:    
700 gals

Remarks:     Originally purchased for railcar type service it was not successful. It had a White-Forster type boiler designed for a working pressure of 300 psig, had four vertical cylinders housed in the rear of the cab and was high geared. At a normal engine speed of 400 rpm, the unit was calculated to develop 200 horsepower. The engine drove a central transverse jackshaft through reduction gearing, the drive from the jackshaft being transmitted to the wheels through conventional side rods. On arrival in New Zealand, it was found to be more than 25 percent heavier than the specified maximum of 20 tons and after trials in Wellington was allocated for use as a shunting engine at the Otahuhu workshops. However it never proved satisfactory and it was written off in 1936.