Data from John Forsythe (Archive Officer, Transport House), Steam Locomotive Data, Public Transport Commission of NSW [New South Wales], July 1974, p. 75, archived at [], last accessed 12 March 2015. (Many thanks to Brett Fitzpatrick for his 11 March 2015 email supplying the link to the CoalsToNewcastle website.) See also [
] (16 May 2003) for full description.
Used for banking (i.e., as a helper engine on a steep grade) and shunting (yard switching). Dimensions very similar to earlier 2-6-0s, but this class had a saddle tank for the water, which concentrated weight on the drivers.
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | I-17/Z26 |
Locobase ID | 2407 |
Railroad | New South Wales |
Country | Australia |
Whyte | 2-6-2ST |
Number in Class | 20 |
Road Numbers | 2601-2620 |
Gauge | Std |
Number Built | 20 |
Builder | Dubs & Co |
Year | 1892 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 11 / 3.35 |
Engine Wheelbase (ft / m) | 27.50 / 8.38 |
Ratio of driving wheelbase to overall engine wheelbase | 0.40 |
Overall Wheelbase (engine & tender) (ft / m) | 27.50 / 8.38 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 32,256 / 14,631 |
Weight on Drivers (lbs / kg) | 92,260 / 41,848 |
Engine Weight (lbs / kg) | 147,644 / 66,970 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 2106 / 7.98 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.48 / 2 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 51 / 25.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 48 / 1219 |
Boiler Pressure (psi / kPa) | 150 / 1030 |
High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 26" / 457x660 |
Tractive Effort (lbs / kg) | 22,376 / 10149.59 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.12 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 234 - 1.75" / 44 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 11.58 / 3.53 |
Firebox Area (sq ft / m2) | 100 / 9.29 |
Grate Area (sq ft / m2) | 21 / 1.95 |
Evaporative Heating Surface (sq ft / m2) | 1345 / 124.95 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1345 / 124.95 |
Evaporative Heating Surface/Cylinder Volume | 175.64 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 3150 |
Same as above plus superheater percentage | 3150 |
Same as above but substitute firebox area for grate area | 15,000 |
Power L1 | 2891 |
Power MT | 207.25 |