Cairns Mulgrave Tramway 4-6-0 Locomotives in Australia
Class Details by Steve Llanso of Sweat House Media
Class 5 (Locobase 13266)
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 31, p.187. See also Dave Elsmore, "Queensland. Cairns Mulgrave Tramway" archived at [
], last accessed 15 October 2011. Works number was 32678 in February 1908.
Elsmore tells us that this railway was an example of a common carrier that was built by the district board (a predecessor to the shire council) instead of the state authorities. Lightly (Elsmore says "cheaply") built, the 31-mile line had "low-level bridges and a minimum of earthworks."It was a demand-stop line "...only stopping on signal to taken on passengers or parcels, with the passengers wishing to alight giving notice to the guard at the previous station."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 5 |
| Locobase ID | 13266 |
| Railroad | Cairns Mulgrave Tramway |
| Country | Australia |
| Whyte | 4-6-0 |
| Number in Class | 1 |
| Road Numbers | 5 |
| Gauge | Metre |
| Number Built | 1 |
| Builder | Burnham, Williams & Co |
| Year | 1908 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9.50 / 2.90 |
| Engine Wheelbase (ft / m) | 17.67 / 5.39 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.54 |
| Overall Wheelbase (engine & tender) (ft / m) | 17.67 / 5.39 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 80,000 / 36,287 |
| Engine Weight (lbs / kg) | 90,000 / 40,823 |
| Tender Loaded Weight (lbs / kg) | 33,600 / 15,241 |
| Total Engine and Tender Weight (lbs / kg) | 123,600 / 56,064 |
| Tender Water Capacity (gals / ML) | 1680 / 6.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.50 / 4 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 40 / 1016 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 20" / 330x508 |
| Tractive Effort (lbs / kg) | 11,492 / 5212.69 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.96 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 176 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.52 / 3.21 |
| Firebox Area (sq ft / m2) | 99 / 9.20 |
| Grate Area (sq ft / m2) | 15.80 / 1.47 |
| Evaporative Heating Surface (sq ft / m2) | 1061 / 98.57 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1061 / 98.57 |
| Evaporative Heating Surface/Cylinder Volume | 345.32 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2528 |
| Same as above plus superheater percentage | 2528 |
| Same as above but substitute firebox area for grate area | 15,840 |
| Power L1 | 5402 |
| Power MT | 446.60 |