Wellington Gas 0-4-0 Locomotives in New_Zealand

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 14041)

Data from Stephen Cook's [], last accessed 2012; see in particular the reprint of "Wellington Gas Works Railway," New Zealand Railway Observer (August 1963), pp. 13-. Works numbers were 1265 in 1911 and 1752 in 1921.

For 606 pounds, the Gas Works bought a conventional steam locomotive to pull their trains of Newcastle (New South Wales) coal from the Gas Works to the Miramar Wharf . In addition, the company ordered 10 hopper cars to carry 5 long tons of coal each on the 95-lb/yard (47.5-kg/metre) rail. Because New Zealand and Barclay's works lay half a world apart, it wasn't until late the next year that the 1 was ready for testing on 7 December 1912.

The 1 had a copper firebox and brass tubes, but its 1921 duplicate had a steel firebox and steel tubes. The tandem ran until 1939, when the gas company resorted to locally mined coal that was delivered by trucks. They were scrapped in 1954.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID14041
RailroadWellington Gas
CountryNew Zealand
Number in Class2
Road Numbers1-2
Number Built2
BuilderAndrew Barclay
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)4 / 1.22
Engine Wheelbase (ft / m)4 / 1.22
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)4 / 1.22
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)22,400 / 10,160
Engine Weight (lbs / kg)22,400 / 10,160
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)22,400 / 10,160
Tender Water Capacity (gals / ML)120 / 0.45
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)19 / 9.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)25 / 635
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)7.5" x 12" / 191x305
Tractive Effort (lbs / kg)3672 / 1665.59
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.10
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)21.50 / 2
Grate Area (sq ft / m2) 3.60 / 0.33
Evaporative Heating Surface (sq ft / m2)132 / 12.26
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)132 / 12.26
Evaporative Heating Surface/Cylinder Volume215.13
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation576
Same as above plus superheater percentage576
Same as above but substitute firebox area for grate area3440
Power L12602
Power MT512.18

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