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Western Pacific class M-80
The Western Pacific class M-80 was an oil-fired 2-6-6-2 Mallet introduced in 1917. It had drivers of 57 inches and cylinders with diameters of 23.5 and 37 inches, at a stroke of 32 inches. Five were built in 1917 by A...
| Western Pacific class M-80Remove | |
|---|---|
| Variant | Standard |
| Built | 1917, 1924 |
| Manufacturers | ALCO |
| Wheel arrangement | (1C)C1 ma |
| Gauge | 1435 mm |
| Length | |
| Service mass | 194818 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Western Pacific class M-80 Standard Remove |
|---|---|
| Built | 1917, 1924 |
| Manufacturers | ALCO |
| Wheel arrangement | 2-6-6-2 (Mallet Mogul) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Western Pacific class M-80 Standard Remove |
|---|---|
| Wheelbase | 15.19 m |
| Total wheelbase | 26.37 m |
| Service mass | 194.8 t |
| Adhesion mass | 161.7 t |
| Total mass | 291.3 t |
| Rigid wheelbase | 3.12 m |
| Axle load | 26.9 t |
| Water capacity | 45,425 l |
| Fuel capacity | 15,142 l (oil) |
Boiler
| Property | Western Pacific class M-80 Standard Remove |
|---|---|
| Grate area | 6.708 m² |
| Firebox surface | 41.249 m² |
| Tube heating surface | 417.321 m² |
| Evaporative heating surface | 458.57 m² |
| Superheater surface | 97.641 m² |
| Total heating surface | 556.2 m² |
Power plant
| Property | Western Pacific class M-80 Standard Remove |
|---|---|
| Driver diameter | 1,448 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | compound |
| Cylinders | four, HP: 597 x 813 mm and LP: 940 x 813 mm |
Power
| Property | Western Pacific class M-80 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 2,610 kW (3,549 PS) |
| Starting effort | 334.1 kN |
| Starting effort simple | 400.9 kN |
Calculated values
| Property | Western Pacific class M-80 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.75 |
| Optimal speed | 48 km/h |
| Power-to-weight ratio | 13.4 kW/t |
| Heating Surface Equivalent | 860.1 m² |
| Cylinder volume/HSE | 1 : 1,184.42 |
| Adhesive weight/Total | 1 : 1.20 |
| Tractive force/Heating surface | 1 : 12.55 |
| Grate area/Heating surface | 1 : 82.92 |
| Firebox/Tube surface | 1 : 10.12 |
| Total/Superheater | 1 : 4.70 |
