Baldwin's specs showed some of the conditions under which the engine would operated. . The fuel was described as coal of "poor quality that clinkers and cakes". Rail weight was limited to 45 lb/yd (22.5 kg/m), maximum grade amounted to 4%, and curves could bend to 35 degrees.
The 4 had only a short career on the KMR because the road closed nine months after it was delivered. Apparently stored unused for three decades (yes, 30 years!), the 4 entered a new life on the White Pass & Yukon and operated for 10 years before it was retired. Years later, the 4 was renamed "Hooterville Cannonball".
For some time, the HC rested in storage in Adair, Okla.
Colorado Zephyr updated Wes Barris' steamlocomotive.com and Locobase in February 2017 as follows: "Purchased by Dr. Charles O. Brantigan MD on behalf of South Park Rail Society, Como, Colorado.
"He [Dr Brantigan] moved #4 from Georgetown Loop RR at Silver Plume, CO, to Wasatch Railroad Contractors, Cheyenne, WY, February 21, 2017. Number 4 will receive maintenance early 2017. Plan is to move summer 2017 number 4 to Como, Colorado, for limited operation on rebuilt Denver, South Park & Pacific RR right of way and Como roundhouse."
The email referred readers to the southparkrail.com, which offered links to several Facebook pages for updates.
|Principal Dimensions by Steve Llanso of Sweat House Media|
|Number in Class||1|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||8 / 2.44|
|Engine Wheelbase (ft / m)||22.67 / 6.91|
|Ratio of driving wheelbase to overall engine wheebase||0.35|
|Overall Wheelbase (engine & tender) (ft / m)||42.12 / 12.84|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||56,000 / 25,401|
|Engine Weight (lbs / kg)||77,000 / 34,927|
|Tender Loaded Weight (lbs / kg)||38,000|
|Total Engine and Tender Weight (lbs / kg)||115,000|
|Tender Water Capacity (gals / ML)|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||31 / 15.50|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||37 / 940|
|Boiler Pressure (psi / kPa)||145 / 10|
|High Pressure Cylinders (dia x stroke) (in / mm)||15" x 20" / 381x508|
|Tractive Effort (lbs / kg)||14,990 / 6799.36|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.74|
|Firebox Area (sq ft / m2)||70 / 6.51|
|Grate Area (sq ft / m2)||15.70 / 1.46|
|Evaporative Heating Surface (sq ft / m2)||906 / 84.20|
|Superheating Surface (sq ft / m2)|
|Combined Heating Surface (sq ft / m2)||906 / 84.20|
|Evaporative Heating Surface/Cylinder Volume||221.48|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||2277|
|Same as above plus superheater percentage||2277|
|Same as above but substitute firebox area for grate area||10,150|