Otago 0-6-0 Locomotives in New_Zealand
Class Details by Steve Llanso of Sweat House Media
Class M (Locobase 5178)
Data from John Garner's comprehensive site at [
] (October 2002)
Starting out as these six-coupled tanks in the 1870s operating on the Bluff-Invercargill-Winton section, these engines, Garner says, were probably the first New Zealand locomotives to use a cowcatcher. Photos show them to have equally spaced axles, short tanks over the last two axles, and slightly inclined outside cylinders. Soon after they entered service with the Otago, the NZGR took them over and reassigned them to Christchurch.
A later rebuilding is covered in Locobase entry 5179.
Class P (Locobase 5180)
Data from John Garner's comprehensive site at [] ... (October 2002). Tiny engines built by a local foundry out of mostly imported parts. (The axles, cylinders, fireboxes, frames, valve motion, and wheels all came from England.) In Otago service they had the names Weka and Kiwa, but were soon taken into NZGR service.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | M | P |
| Locobase ID | 5178 | 5180 |
| Railroad | Otago | Otago |
| Country | New Zealand | New Zealand |
| Whyte | 0-6-0T | 0-6-0ST |
| Number in Class | 4 | 2 |
| Road Numbers | ||
| Gauge | 3'6" | 3'6" |
| Number Built | 4 | 2 |
| Builder | Hunslet Engine Co | James Davidson |
| Year | 1877 | 1876 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 12 / 3.66 | |
| Engine Wheelbase (ft / m) | 12 / 3.66 | |
| Ratio of driving wheelbase to overall engine wheelbase | 1 | |
| Overall Wheelbase (engine & tender) (ft / m) | 12 / 3.66 | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 62,048 / 28,145 | 26,880 / 12,193 |
| Engine Weight (lbs / kg) | 62,048 / 28,145 | 26,880 / 12,193 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | 62,048 / 28,145 | 26,880 / 12,193 |
| Tender Water Capacity (gals / ML) | 720 / 2.73 | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.50 / 1 | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 34 / 17 | 15 / 7.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 42 / 1067 | 28 / 711 |
| Boiler Pressure (psi / kPa) | 130 / 900 | 120 / 830 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 20" / 330x508 | 8" x 15" / 203x381 |
| Tractive Effort (lbs / kg) | 8893 / 4033.80 | 3497 / 1586.21 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.98 | 7.69 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | ||
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | ||
| Firebox Area (sq ft / m2) | ||
| Grate Area (sq ft / m2) | 8.60 / 0.80 | 3.50 / 0.33 |
| Evaporative Heating Surface (sq ft / m2) | 583 / 54.18 | 161 / 14.96 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 583 / 54.18 | 161 / 14.96 |
| Evaporative Heating Surface/Cylinder Volume | 189.75 | 184.49 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 1118 | 420 |
| Same as above plus superheater percentage | 1118 | 420 |
| Same as above but substitute firebox area for grate area | ||
| Power L1 | ||
| Power MT | ||