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Denver, North Western & Pacific No. 200 to 216
Numbers 200 to 209 were built by Schenectady in 1909 and 1910 as 0-6-6-0 all-adhesion Mallets . Their special task was to haul rotary snow plows at speeds as low as 4 mph without stalling. Railway Gazette once wrote t...
General
| Property | Denver, North Western & Pacific No. 200 to 216 Remove |
|---|---|
| Built | 1936 |
| Manufacturers | DNW&P |
| Wheel arrangement | 2-6-6-0 |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Denver, North Western & Pacific No. 200 to 216 Remove |
|---|---|
| Length | 25.30 m |
| Wheelbase | 11.94 m |
| Rigid wheelbase | 3.05 m |
| Total wheelbase | 22.25 m |
| Service weight | 164.2 t |
| Adhesive weight | 150.6 t |
| Axle load | 25.1 t |
| Total weight | 244 t |
| Water capacity | 34,069 l |
| Fuel capacity | 15.4 t (coal) |
Boiler
| Property | Denver, North Western & Pacific No. 200 to 216 Remove |
|---|---|
| Grate area | 6.708 m² |
| Firebox surface | 21.275 m² |
| Tube heating surface | 361.3 m² |
| Evaporative heating surface | 382.575 m² |
| Superheater surface | 116.036 m² |
| Total heating surface | 498.6 m² |
Power plant
| Property | Denver, North Western & Pacific No. 200 to 216 Remove |
|---|---|
| Driver diameter | 1,397 mm |
| Boiler pressure | 15.5 bar |
| Expansion type | compound |
| Cylinders | four, HP: 533 x 813 mm and LP: 851 x 813 mm |
Power
| Property | Denver, North Western & Pacific No. 200 to 216 Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,976 kW (2,687 PS) |
| Starting effort | 313.4 kN |
| Starting effort simple | 376.1 kN |
Calculated values
| Property | Denver, North Western & Pacific No. 200 to 216 Remove |
|---|---|
| Factor of adhesion | 1 : 4.71 |
| Optimal speed | 39 km/h |
| Power-to-weight ratio | 12.0 kW/t |
| Heating Surface Equivalent | 721.0 m² |
| Cylinder volume/HSE | 1 : 1,144.84 |
| Adhesive weight/Total | 1 : 1.09 |
| Tractive force/Heating surface | 1 : 13.13 |
| Grate area/Heating surface | 1 : 74.33 |
| Firebox/Tube surface | 1 : 16.98 |
| Total/Superheater | 1 : 3.30 |
