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Natal Government Railways class B (1909) “Hendrie D”
The class B of 1909, also called “Hendrie D” after its designer, was the first 4-8-2 “Mountain” locomotive with a firebox behind all driving axles . It was intended for heavy coal traffic on the upper Natal mainline a...
| Natal Government Railways class B (1909) “Hendrie D”Remove | |
|---|---|
| Variant | rebuilt 3R |
| Built | ab 1935 |
| Manufacturers | SAR |
| Wheel arrangement | 2D1 |
| Gauge | 1067 mm |
| Length | 19266 mm |
| Service mass | 94492 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Natal Government Railways class B (1909) “Hendrie D”rebuilt 3R |
|---|---|
| Built | ab 1935 |
| Manufacturers | SAR |
| Wheel arrangement | 4-8-2 (Mountain) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | Natal Government Railways class B (1909) “Hendrie D”rebuilt 3R |
|---|---|
| Length | 19.27 m |
| Wheelbase | 9.37 m |
| Total wheelbase | 16.96 m |
| Service mass | 94.5 t |
| Adhesion mass | 61.5 t |
| Total mass | 130.1 t |
| Rigid wheelbase | 3.89 m |
| Axle load | 15.8 t |
| Water capacity | 18,185 l |
| Fuel capacity | 8.4 t (coal) |
Boiler
| Property | Natal Government Railways class B (1909) “Hendrie D”rebuilt 3R |
|---|---|
| Grate area | 3.437 m² |
| Firebox surface | 13.192 m² |
| Tube heating surface | 178.56 m² |
| Evaporative heating surface | 191.752 m² |
| Superheater surface | 40.32 m² |
| Total heating surface | 232.1 m² |
Power plant
| Property | Natal Government Railways class B (1909) “Hendrie D”rebuilt 3R |
|---|---|
| Driver diameter | 1,156 mm |
| Boiler pressure | 13.1 bar |
| Expansion type | simple expansion |
| Cylinders | two, 533 x 610 mm |
Power
| Property | Natal Government Railways class B (1909) “Hendrie D”rebuilt 3R |
|---|---|
| Power source | steam |
| Estimated power | 895 kW (1,217 PS) |
| Starting effort | 167.1 kN |
Calculated values
| Property | Natal Government Railways class B (1909) “Hendrie D”rebuilt 3R |
|---|---|
| Factor of adhesion | 1 : 3.61 |
| Optimal speed | 32 km/h |
| Power-to-weight ratio | 9.5 kW/t |
| Heating Surface Equivalent | 338.4 m² |
| Cylinder volume/HSE | 1 : 805.20 |
| Adhesive weight/Total | 1 : 1.54 |
| Tractive force/Heating surface | 1 : 15.04 |
| Grate area/Heating surface | 1 : 67.52 |
| Firebox/Tube surface | 1 : 13.54 |
| Total/Superheater | 1 : 4.76 |
