This Bend, Ore lumber company operated the oil-burning #2 on 60 lb/yard (30 kg/metre) rail, up 5% grades, and around 25-degree curves. Loggerhogger points out the 1930s upgrade with piston valves and a superheater. (See Locobase 14713 for the #6, which arrived superheated and used many of the same dimensions.) Its "most subtle and well done conversion" added five feet (1.524 metres) to the tender gave it the range it needed to travel the 60 miles (96.6 km) on the Great Northern's section running from Bend to Summit Station and later to Chemult.
When S-H was taken into the Brooks-Scanlon empire, both the 2 and the 4 remained in service " just long enough," says LoggerHogger, "to clean out the operations at the Timber Camp north of Gilchrist, OR so as to comply with the GN trackage agreement."
Shevlin-Hixon's first logging Mikado from Baldwin arrived in 1916 (Locobase 14311). Three years later the Bend, Ore lumber company returned for a larger version. It had taller drivers, 50% more heating surface and grate area (although a proportionately smaller firebox, which arguably mattered more in an oil-burner). Like the 2, the 4 rolled on 60 lb/yard (30 kg/metre) rail, confronted 5% grades, and bent around 25 degree curves.
LoggerHogger points out that by the 1930s, S-H use of the Great Northern main line extended from Bend through Summit Station all the way to Chemult, 60 miles (96.6 km ) away. He notes that, like the 2, "S-H #4 received the same valve and superheater conversion and she got a tender from one of the 2 McCloud River RR 2-8-2 engines recently received from Alaska at the McCloud. This bigger tender gave #4 the additional range she needed for the longer runs to Chemult."
When S-H was taken into the Brooks-Scanlon empire, both the 2 and the 4 remained in service " just long enough," says LoggerHogger, "to clean out the operations at the Timber Camp north of Gilchrist, OR so as to comply with the GN trackage agreement." They were then scrapped.
Shevlin-Hixon added four logging Mikados to its roster after the 2 arrived in 1916 (Locobase 14311) The first one to be delivered as a superheated engine was 5, which repeated many of the dimensions of the 2. The 6 followed shortly thereafter. Their outside radial gear operated 8" (203 mm) piston valves.
As with all S-H engines, when Brooks-Scanlon took over the S-H stud in 1950 as part of its acquisition of the Bend, Ore company, it scrapped the 6 in short order.
As with the 5 and 6 (Locobase 14713), the 8 was a superheated version of an earlier S-H logging Mikado. Baldwin's update of the saturated boiler was limited to the removal of 151 small tubes and their replacement by 28 flues. The engine also used outside radial gear to actuate the 12" (305 mm) piston valves.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Shevlin-Hixon Company||Shevlin-Hixon Company||Shevlin-Hixon Company||Shevlin-Hixon Company|
|Number in Class||1||1||2||1|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||12.08 / 3.68||13.08 / 3.99||12 / 3.66||13.08 / 3.99|
|Engine Wheelbase (ft / m)||27.25 / 8.31||27 / 8.23||27.58 / 8.41||27.08 / 8.25|
|Ratio of driving wheelbase to overall engine wheebase||0.44||0.48||0.44||0.48|
|Overall Wheelbase (engine & tender) (ft / m)||49.96 / 15.23||53.58 / 16.33||51.02 / 15.55||54.52 / 16.62|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||111,000 / 50,349||136,500 / 61,915||116,000 / 52,617||143,000 / 64,864|
|Engine Weight (lbs / kg)||139,000 / 63,049||175,500 / 79,606||143,000 / 64,864||181,000 / 82,100|
|Tender Loaded Weight (lbs / kg)||70,000 / 31,752||80,000 / 36,287||90,500 / 41,050||80,000 / 36,287|
|Total Engine and Tender Weight (lbs / kg)||209,000 / 94,801||255,500 / 115,893||233,500 / 105,914||261,000 / 118,387|
|Tender Water Capacity (gals / ML)||3500 / 13.26||4000 / 15.15||4000 / 15.15||4000 / 15.15|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||1600 / 6.10||2000 / 7.60||2000 / 7.60||2000 / 7.60|
|Minimum weight of rail (calculated) (lb/yd)||46||57||48||60|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||44 / 1118||48 / 1219||44 / 1118||48 / 1219|
|Boiler Pressure (psi / kPa)||180 / 12.40||170 / 11.70||185 / 12.80||170 / 11.70|
|High Pressure Cylinders (dia x stroke) (in / mm)||18" x 24" / 457x610||20.5" x 28" / 521x711||18" x 24" / 457x610||20.5" x 28" / 521x711|
|Tractive Effort (lbs / kg)||27,039 / 12264.70||35,424 / 16068.08||27,790 / 12605.35||35,424 / 16068.08|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.11||3.85||4.17||4.04|
|Firebox Area (sq ft / m2)||140 / 13.01||149 / 13.84||141 / 13.10||154 / 14.31|
|Grate Area (sq ft / m2)||25.50 / 2.37||41.30 / 3.84||25.50 / 2.37||41.30 / 3.84|
|Evaporative Heating Surface (sq ft / m2)||2108 / 195.84||3157 / 293.29||1576 / 146.41||2476 / 230.03|
|Superheating Surface (sq ft / m2)||328 / 30.47||553 / 51.37|
|Combined Heating Surface (sq ft / m2)||2108 / 195.84||3157 / 293.29||1904 / 176.88||3029 / 281.40|
|Evaporative Heating Surface/Cylinder Volume||298.22||295.14||222.96||231.48|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||4590||7021||4718||7021|
|Same as above plus superheater percentage||4590||7021||5519||8285|
|Same as above but substitute firebox area for grate area||25,200||25,330||30,519||30,892|