Shevlin-Hixon Co. Baldwin 2-8-2
In 1916, the Shevlin-Hixon Lumber Co. built one of the world's largest sawmills in Bend, Oregon. It was connected to a standard gauge rail network with 60 pounds per yard rails, five percent grades and 25-degree curves, what corresponds to a radius of 70 meters. The most significant part of their locomotive roster were five Mikados built by Baldwin between 1916 and 1924. All burned oil for better fire protection while working in the forest.
The first one was No. 2 with drivers of 44 inches and cylinders of 18 by 24 inches. No. 4, built three years later, had a boiler that was around 50 percent larger. Also the drivers were larger at 48 inches, while the cylinders measured 20.5 by 28 inches. Numbers 5 and 6, built in 1922, had basically the same smaller dimensions as No. 2, but were superheated. No. 8, the last one, again had basically the same larger dimensions as No. 4, but was also superheated.
Also the first two were fitted with superheaters and piston valves in the thirties. At the same time, Shevlin-Hixon obtained trackage rights for 60 miles of the Great Northern main line. Now the tenders were enlarged of replaced by bigger ones to provide sufficient range. After the company had been bought by Brooks-Scanlon in 1950, the sawmill was closed and all locomotives scrapped.
Technical data
General
| Property | 2 | 4 | 5, 6 | 8 |
|---|---|---|---|---|
| Built | 1916 | 1919 | 1922 | 1924 |
| Manufacturers | Baldwin | |||
| Wheel arrangement | 2-8-2 (Mikado) | |||
| Gauge | 1,435 mm (Standard gauge) | |||
Dimensions and weights
| Property | 2 | 4 | 5, 6 | 8 |
|---|---|---|---|---|
| Wheelbase | 8.31 m | 8.23 m | 8.26 m | |
| Total wheelbase | 15.23 m | 16.64 m | 15.55 m | 16.62 m |
| Service mass | 63 t | 79.6 t | 64.9 t | 82.1 t |
| Adhesion mass | 50.3 t | 61.9 t | 52.6 t | 64.9 t |
| Total mass | 94.8 t | 115.9 t | 105.9 t | 118.4 t |
| Rigid wheelbase | 3.68 m | 3.99 m | 3.66 m | 3.99 m |
| Water capacity | 13,249 l | 15,142 l | ||
| Fuel capacity | 0.7 t (oil) | 0.9 t (oil) | ||
Boiler
| Property | 2 | 4 | 5, 6 | 8 |
|---|---|---|---|---|
| Grate area | 2.369 m² | 3.837 m² | 2.369 m² | 3.837 m² |
| Firebox surface | 13.006 m² | 13.843 m² | 13.099 m² | 14.307 m² |
| Tube heating surface | 182.833 m² | 279.453 m² | 133.316 m² | 215.721 m² |
| Evaporative heating surface | 195.84 m² | 293.295 m² | 146.415 m² | 230.028 m² |
| Total heating surface | 195.8 m² | 293.3 m² | 176.9 m² | 281.4 m² |
| Superheater surface | 30.472 m² | 51.375 m² |
Power plant
| Property | 2 | 4 | 5, 6 | 8 |
|---|---|---|---|---|
| Driver diameter | 1,118 mm | 1,219 mm | 1,118 mm | 1,219 mm |
| Boiler pressure | 12.4 bar | 11.7 bar | 12.8 bar | 11.7 bar |
| Expansion type | simple expansion | |||
| Cylinders | two, 457 x 610 mm | two, 521 x 711 mm | two, 457 x 610 mm | two, 521 x 711 mm |
Power
| Property | 2 | 4 | 5, 6 | 8 |
|---|---|---|---|---|
| Power source | steam | |||
| Estimated power | 708 kW (963 PS) | 969 kW (1,317 PS) | 783 kW (1,065 PS) | 1,081 kW (1,470 PS) |
| Starting effort | 120.3 kN | 157.6 kN | 123.6 kN | 157.6 kN |
Calculated values
| Property | 2 | 4 | 5, 6 | 8 |
|---|---|---|---|---|
| Factor of adhesion | 1 : 4.11 | 1 : 3.85 | 1 : 4.18 | 1 : 4.04 |
| Optimal speed | 35 km/h | 37 km/h | 39 km/h | 42 km/h |
| Power-to-weight ratio | 11.2 kW/t | 12.2 kW/t | 12.1 kW/t | 13.2 kW/t |
| Heating Surface Equivalent | 260.9 m² | 362.5 m² | 272.9 m² | 404.3 m² |
| Cylinder volume/HSE | 1 : 767.28 | 1 : 835.54 | 1 : 733.58 | 1 : 749.15 |
| Adhesive weight/Total | 1 : 1.25 | 1 : 1.29 | 1 : 1.23 | 1 : 1.27 |
| Tractive force/Heating surface | 1 : 12.83 | 1 : 11.22 | 1 : 14.60 | 1 : 11.69 |
| Grate area/Heating surface | 1 : 82.67 | 1 : 76.44 | 1 : 74.67 | 1 : 73.34 |
| Firebox/Tube surface | 1 : 14.06 | 1 : 20.19 | 1 : 10.18 | 1 : 15.08 |
| Total/Superheater | 1 : 4.80 | 1 : 4.48 |