Rakaia & Ashburton Forks 2-4-4 Locomotives in New_Zealand
Class Details by Steve Llanso of Sweat House Media
Class Livingston/Q (Locobase 5181)
Data from John Garner's comprehensive site at [
] ... (October 2002). See also Charles Rous-Marten, "New Zealand Railways: Their History, Engines and Work", The Railway Magazine (December 1899), pp. 567+. Works numbers were 2510, 2512 in January 1879.
Lightweight passenger tanks that resembled the tender-engine Ks delivered in the same period. They were patriotically named for the famous 1872 pairing of the journalist Henry Stanley and the "missing" Dr David Livingston.
Photos show them to have been pocket editions of a standard American design with cabbage stack, long cowcatcher, ornate dome covers, and large cab. Rous-Marten noted that the pair had been taken into the New Zealand Government Railways soon after they arrived, stating "On being taken over by the State they proved very useful on light fast trains, and I have known them run at 48 miles an hour on the Timaru-Oamaru stage of the Christchurch-Dunedin express."
"But," he added,"the type was not powerful enough to be worth multiplication or perpetuation."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Livingston/Q |
| Locobase ID | 5181 |
| Railroad | Rakaia & Ashburton Forks |
| Country | New Zealand |
| Whyte | 2-4-4T |
| Number in Class | 2 |
| Road Numbers | Q51, Q17 |
| Gauge | 3'6" |
| Number Built | 2 |
| Builder | Rogers |
| Year | 1878 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 6 / 1.83 |
| Engine Wheelbase (ft / m) | 27.59 / 8.41 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.22 |
| Overall Wheelbase (engine & tender) (ft / m) | 27.59 / 8.41 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 32,928 / 14,936 |
| Engine Weight (lbs / kg) | 64,960 / 29,465 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 64,960 / 29,465 |
| Tender Water Capacity (gals / ML) | 2040 / 7.73 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 27 / 13.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 18" / 279x457 |
| Tractive Effort (lbs / kg) | 5014 / 2274.31 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.57 |
| 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 / 0.74 |
| Evaporative Heating Surface (sq ft / m2) | 424 / 39.41 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 424 / 39.41 |
| Evaporative Heating Surface/Cylinder Volume | 214.16 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1040 |
| Same as above plus superheater percentage | 1040 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |