Amos Pillsbury's specifications were met most satisfactorily by the Schenectady Works, according to American Engineer and Railroad Journal (AERJ) of March 1896. "[The design] has a large grate and ample heating surface," noted the author, "and is proving to be an excellent steamer." They were also "light on fuel."
AERJ later commented on the cylinder size and the relatively tall drivers for the time. The piston rods came through the end of the cylinder, a notable practice that had contributed to a "considerable" savings in wear. About the drivers, the journal commented that "the use of comparatively large drivers on freight engines is a move in the right direction."
| Specifications | |
|---|---|
| Class | M |
| Locobase ID | 5868 |
| Railroad | Maine Central |
| Whyte | 2-6-0 |
| Road Numbers | 244-245 |
| Gauge | Std |
| Builder | Alco-Schenectady |
| Year | 1894 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 14.67' |
| Engine Wheelbase | 22.25' |
| Ratio of driving wheelbase to overall engine wheebase | 0.66 |
| Overall Wheelbase (engine & tender) | 47.61' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 117600 lbs |
| Engine Weight | 136600 lbs |
| Tender Light Weight | 156000 lbs |
| Total Engine and Tender Weight | 292600 lbs |
| Tender Water Capacity | 4000 gals |
| Tender Fuel Capacity (oil/coal) | 8 tons |
| Minimum weight per yard of rail on which locomotive could run | 65.33 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 63" |
| Boiler Pressure | 160 psi |
| Cylinders (dia x stroke) | 19" x 26" |
| Tractive Effort | 20262 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.80 |
| Heating Ability | |
| Firebox Area | 175.54 sq. ft |
| Grate Area | 25.96 sq. ft |
| Evaporative Heating Surface | 2172 |
| Superheating Surface | |
| Combined Heating Surface | 2172 |
| Evaporative Heating Surface/Cylinder Volume | 254.57 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4153.60 |
| Same as above plus superheater percentage | 4153.60 |
| Same as above but substitute firebox area for grate area | 28086.40 |
| Power L1 | 6004.95 |
| Power MT | 337.72 |
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