Data from NC&StL 1 - 1921 Locomotive Diagrams and Cranes supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.
The Butte, Anaconda & Pacific bought three cross-compound Mastodons from Schenectady in 1897; see Locobase 14417. After the BA&P's electrification was completed in 1914, the class was idled until it was sold in 1917 to the as their class I1-44; they were renumbered 850-852.
In 1920, all three engines were slightly modified in a significant way when the LP cylinder was removed and a second 23" HP cylinder was fitted instead. In an effort to encourage adhesion, the altering railroad (either the BA&P or the Nashville, Chattanooga & St Louis) also reduced the boiler pressure by 40 psi (2.75 bar). Even so, a look at the data shows that these engines were still likely to be slippery.
The NC&StL operated the engines in transfer service or as heavy switchers for a decade or more. In 1924, the NC&StL installed a superheater in 850; see Locobase 14419. Two years later, the railroad retired the 852 in September 1926. The 850 followed in November 1927 and the 851 in May 1932.
Data from NC&StL 1 - 1921 Locomotive Diagrams and Cranes supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.
The Dixie Line must have wondered after they converted their three adopted cross-compound Mastodons to simple expansion (Locobase 14418) whether this big switcher/transfer engine trio could have extended lives if they were fitted with a modest degree of superheat. So they installed a small Schmidt-type unit in the 850 in 1924. When the engine was superheated, it lost some heating surface area as often happened, but gained 26 sq ft of arch tubes as part of its firebox heating surface
Results must have disappointed as the 850 was scrapped November 1927, after the 852 and five years before the 851..
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | I1-44 | I1-44 - superheated |
Locobase ID | 14418 | 14419 |
Railroad | Nashville, Chattanooga & St. Louis (NC&StL) | Nashville, Chattanooga & St. Louis (NC&StL) |
Country | USA | USA |
Whyte | 4-8-0 | 4-8-0 |
Number in Class | 3 | 1 |
Road Numbers | 850-852 | 850 |
Gauge | Std | Std |
Number Built | ||
Builder | Alco-Schenectady | Alco-Schenectady |
Year | 1914 | 1924 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 15.75 / 4.80 | 15.75 / 4.80 |
Engine Wheelbase (ft / m) | 26.75 / 8.15 | 26.75 / 8.15 |
Ratio of driving wheelbase to overall engine wheelbase | 0.59 | 0.59 |
Overall Wheelbase (engine & tender) (ft / m) | 53.83 / 16.41 | 53.83 / 16.41 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 154,000 / 69,853 | 154,000 / 69,853 |
Engine Weight (lbs / kg) | 193,000 / 87,543 | 193,000 / 87,543 |
Tender Loaded Weight (lbs / kg) | 112,000 / 50,802 | 108,000 / 48,988 |
Total Engine and Tender Weight (lbs / kg) | 305,000 / 138,345 | 301,000 / 136,531 |
Tender Water Capacity (gals / ML) | 4500 / 17.05 | 4500 / 17.05 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 9.50 / 9 | 9.50 / 9 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 64 / 32 | 64 / 32 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 56 / 1422 | 56 / 1422 |
Boiler Pressure (psi / kPa) | 170 / 1170 | 170 / 1170 |
High Pressure Cylinders (dia x stroke) (in / mm) | 23" x 32" / 584x813 | 23" x 32" / 584x813 |
Tractive Effort (lbs / kg) | 43,680 / 19812.94 | 43,680 / 19812.94 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.53 | 3.53 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 328 - 2.25" / 57 | 216 - 2.25" / 57 |
Flues (number - dia) (in / mm) | 20 - 5.5" / 140 | |
Flue/Tube length (ft / m) | 14 / 4.27 | 13.62 / 4.15 |
Firebox Area (sq ft / m2) | 206.51 / 19.19 | 232.50 / 21.60 |
Grate Area (sq ft / m2) | 35 / 3.25 | 35 / 3.25 |
Evaporative Heating Surface (sq ft / m2) | 2928 / 272.02 | 2358 / 219.06 |
Superheating Surface (sq ft / m2) | 320 / 29.73 | |
Combined Heating Surface (sq ft / m2) | 2928 / 272.02 | 2678 / 248.79 |
Evaporative Heating Surface/Cylinder Volume | 190.25 | 153.22 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 5950 | 5950 |
Same as above plus superheater percentage | 5950 | 6664 |
Same as above but substitute firebox area for grate area | 35,107 | 44,268 |
Power L1 | 4083 | 6599 |
Power MT | 233.80 | 377.88 |