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Queensland Railways class C17 and Commonwealth Railways class NM
As a development of the C16, C.F. Pemberton developed the class C17. While the letter C stood for four coupled axles , the 17 indicated the cylinder diameter in inches. Production took place on a large scale in QR's o...
| Queensland Railways class C17 and Commonwealth Railways class NMRemove | |
|---|---|
| Variant | as built |
| Built | 1920-1953 |
| Manufacturers | North Ipswich;Armstrong Whitworth;Clyde Engineering;Walkers;Evans, Anderson, Phelan & Co. |
| Wheel arrangement | 2D |
| Gauge | 1067 mm |
| Length | 16294 mm |
| Service mass | 46738 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Queensland Railways class C17 and Commonwealth Railways class NMas built |
|---|---|
| Built | 1920-1953 |
| Manufacturers | North Ipswich, Armstrong Whitworth, Clyde Engineering, Walkers, Evans, Anderson, Phelan & Co. |
| Wheel arrangement | 4-8-0 (Twelve-wheeler) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | Queensland Railways class C17 and Commonwealth Railways class NMas built |
|---|---|
| Length | 16.29 m |
| Service mass | 46.7 t |
| Adhesion mass | 36.2 t |
| Total mass | 79.5 t |
| Rigid wheelbase | 3.81 m |
| Axle load | 9.1 t |
| Water capacity | 13,866 l |
| Fuel capacity | 8.4 t (coal) |
Boiler
| Property | Queensland Railways class C17 and Commonwealth Railways class NMas built |
|---|---|
| Grate area | 1.719 m² |
| Firebox surface | 10.777 m² |
| Tube heating surface | 82.126 m² |
| Evaporative heating surface | 92.903 m² |
| Superheater surface | 16.444 m² |
| Total heating surface | 109.3 m² |
Power plant
| Property | Queensland Railways class C17 and Commonwealth Railways class NMas built |
|---|---|
| Driver diameter | 1,143 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 432 x 559 mm |
Power
| Property | Queensland Railways class C17 and Commonwealth Railways class NMas built |
|---|---|
| Power source | steam |
| Estimated power | 597 kW (812 PS) |
| Starting effort | 85.5 kN |
Calculated values
| Property | Queensland Railways class C17 and Commonwealth Railways class NMas built |
|---|---|
| Factor of adhesion | 1 : 4.16 |
| Optimal speed | 43 km/h |
| Power-to-weight ratio | 12.8 kW/t |
| Heating Surface Equivalent | 179.7 m² |
| Cylinder volume/HSE | 1 : 910.86 |
| Adhesive weight/Total | 1 : 1.29 |
| Tractive force/Heating surface | 1 : 16.33 |
| Grate area/Heating surface | 1 : 63.61 |
| Firebox/Tube surface | 1 : 7.62 |
| Total/Superheater | 1 : 5.65 |
