New South Wales 4-6-4 Locomotives in Australia
Class Details by Steve Llanso of Sweat House Media
Class S-636/C30 (Locobase 2409)
Data from 2 Jan 1961 publicity handout from the NSW reproduced at [
] . This source notes that some of the C30s on the North Shore line had 19" cylinders and 175-psi settings for more tractive power. See also "'Double-Ender' Tank Locomotive, New South Wales Government Railways", The Locomotive Magazine, Vol X (15 September 1904), p. 153.
95 were built by Beyer, Peacock & Co., 50 at NSW's Everleigh shops. Like many of the NSW engines of this era, these had Belpaire fireboxes.
Note the high weight and low drivers suitable for good traction and rapid acceleration in suburban commuter service, which they served beginning in 1903. 77 of these were converted to C30T 4-6-0 tender engines from 1928-1933. As late as 1961, the system still had 67 left in service.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | S-636/C30 |
| Locobase ID | 2409 |
| Railroad | New South Wales |
| Country | Australia |
| Whyte | 4-6-4T |
| Number in Class | 145 |
| Road Numbers | 3001-3145 |
| Gauge | Std |
| Number Built | 145 |
| Builder | several |
| Year | 1903 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10.75 / 3.28 |
| Engine Wheelbase (ft / m) | 32.25 / 9.83 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.33 |
| Overall Wheelbase (engine & tender) (ft / m) | 32.25 / 9.83 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 33,236 / 15,076 |
| Weight on Drivers (lbs / kg) | 95,900 / 43,500 |
| Engine Weight (lbs / kg) | 161,644 / 73,321 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 161,644 / 73,321 |
| Tender Water Capacity (gals / ML) | 1896 / 7.18 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.30 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 53 / 26.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 55 / 1397 |
| Boiler Pressure (psi / kPa) | 162.40 / 1120 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.5" x 26" / 470x660 |
| Tractive Effort (lbs / kg) | 22,334 / 10130.54 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.29 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 219 - 1.875" / 48 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.41 / 3.78 |
| Firebox Area (sq ft / m2) | 118.60 / 11.02 |
| Grate Area (sq ft / m2) | 24 / 2.23 |
| Evaporative Heating Surface (sq ft / m2) | 1453 / 135.04 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1453 / 135.04 |
| Evaporative Heating Surface/Cylinder Volume | 179.63 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3898 |
| Same as above plus superheater percentage | 3898 |
| Same as above but substitute firebox area for grate area | 19,261 |
| Power L1 | 3765 |
| Power MT | 259.66 |