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East Broad Top No. 12
The East Broad Top operated six Mikados, all of which survive to this day. The oldest of these is No. 12, which was christened “Millie”. Like her newer sisters, she had 48-inch diameter drivers, but was lighter and ha...
General
| Property | East Broad Top No. 12Remove |
|---|---|
| Built | 1911 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2-8-2 (Mikado) |
| Gauge | 914 mm (Three feet) |
Dimensions and weights
| Property | East Broad Top No. 12Remove |
|---|---|
| Wheelbase | 7.98 m |
| Rigid wheelbase | 3.96 m |
| Total wheelbase | 14.90 m |
| Service weight | 50.8 t |
| Adhesive weight | 39.9 t |
| Axle load | 10 t |
| Total weight | 78 t |
| Water capacity | 11,356 l |
| Fuel capacity | 5.4 t (coal) |
Boiler
| Property | East Broad Top No. 12Remove |
|---|---|
| Grate area | 2.991 m² |
| Firebox surface | 10.219 m² |
| Tube heating surface | 146.415 m² |
| Evaporative heating surface | 156.635 m² |
| Total heating surface | 156.6 m² |
Power plant
| Property | East Broad Top No. 12Remove |
|---|---|
| Driver diameter | 1,219 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 432 x 610 mm |
Power
| Property | East Broad Top No. 12Remove |
|---|---|
| Power source | steam |
| Estimated power | 597 kW (812 PS) |
| Starting effort | 98.3 kN |
Calculated values
| Property | East Broad Top No. 12Remove |
|---|---|
| Factor of adhesion | 1 : 3.98 |
| Optimal speed | 37 km/h |
| Power-to-weight ratio | 11.8 kW/t |
| Heating Surface Equivalent | 207.7 m² |
| Cylinder volume/HSE | 1 : 859.47 |
| Adhesive weight/Total | 1 : 1.27 |
| Tractive force/Heating surface | 1 : 13.11 |
| Grate area/Heating surface | 1 : 52.37 |
| Firebox/Tube surface | 1 : 14.33 |
