Baldwin's logging Mikados burned almost anything to keep going. Some used oil and others, like this BH&N locomotive, burned wood; the latter's tender capacity was three cords. And while some of the type used Walschaert's outside radial valve gear, this one supplied steam to the cylinders with a Stephenson link motion.
The BH&N featured 6% grades and 20 degree curves (radii of 288 feet/87.8 metres).
In 1916, the 12-mile (19.3 km) subsidiary BH&N was merged with its owner, Mason County Logging Company. Both locomotives served MCLC for a long time. 6's subsequent career is unknown to Locobase.
Locobase 13291 describes the earlier wood-burning logging engine supplied to the BH&N in 1910. When Baldwin built the second of the two Mikados four years later, they delivered a similar engine with higher boiler pressure and an oil-burner.
9 was sold to the Carlton & Coast in early 1945 as their #11, but that road closed very shortl. See http://www.brian894x4.com/CarltonandCoastRailroad.html, last accessed 25 October 2011, for an account of this road.
Mike #9 went on in April 1945 to the Tonopah & Goldfield in Nevada. Alas for the now aged 11, the T & G was abandoned in October 1947 and the engine was scrapped in 1948.
|Principal Dimensions by Steve Llanso of Sweat House Media|
|Railroad||Black Hills & Northwestern||Black Hills & Northwestern|
|Number in Class||1||1|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||13.08 / 3.99||13.08 / 3.99|
|Engine Wheelbase (ft / m)||27 / 8.23||27 / 8.23|
|Ratio of driving wheelbase to overall engine wheebase||0.48||0.48|
|Overall Wheelbase (engine & tender) (ft / m)||53.17 / 16.21||53.67 / 16.21|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||134,000 / 60,781||137,000 / 60,781|
|Engine Weight (lbs / kg)||173,000 / 78,472||175,000 / 78,472|
|Tender Loaded Weight (lbs / kg)||80,000 / 36,287||80,000 / 36,287|
|Total Engine and Tender Weight (lbs / kg)||253,000 / 114,759||255,000 / 114,759|
|Tender Water Capacity (gals / ML)||4000 / 15.15||4000 / 15.15|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||2000 / 7.60||2000 / 7.60|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||56 / 28||57 / 28.50|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||48 / 1219||48 / 1219|
|Boiler Pressure (psi / kPa)||160 / 11||175 / 11|
|High Pressure Cylinders (dia x stroke) (in / mm)||20.5" x 28" / 521x711||20.5" x 28" / 521x711|
|Tractive Effort (lbs / kg)||33,340 / 15122.79||36,465 / 16540.27|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.02||3.76|
|Firebox Area (sq ft / m2)||158 / 14.68||158 / 14.68|
|Grate Area (sq ft / m2)||41.30 / 3.84||41.30 / 3.84|
|Evaporative Heating Surface (sq ft / m2)||3166 / 294.13||3166 / 294.13|
|Superheating Surface (sq ft / m2)|
|Combined Heating Surface (sq ft / m2)||3166 / 294.13||3166 / 294.13|
|Evaporative Heating Surface/Cylinder Volume||295.98||295.98|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||6608||7228|
|Same as above plus superheater percentage||6608||7228|
|Same as above but substitute firebox area for grate area||25,280||27,650|