Passed along to the C&O after the 1947 merger and renumbered 2975-2989. Among the lightest Santa Fes in service in any US railroad with the smallest boiler and relatively modest cylinder dimensions. Firebox heating surface was generous and included 89 sq ft of thermic syphons and 19.5 sq ft of arch tubes.
The Pere Marquette Historical Society website page http://www.pmhistsoc.org/cgi-bin/gallery.pl?f=locos-1108-110737, last accessed 8 March 2008, shows a William R Dewey photo of 1108 and makes the following observation: "Most notable when looking at them broadside were the 33-inch pilot and trailing wheels, which were a good ten inches smaller than most 2-10-2s' of the day." Another feature of note was the sand dome over the first axle, which was tall and drum-like.
| Specifications | |
|---|---|
| Class | SF |
| Locobase ID | 478 |
| Railroad | Pere Marquette (PM) |
| Whyte | 2-10-2 |
| Road Numbers | 1101-1115 |
| Gauge | Std |
| Builder | Alco-Brooks |
| Year | 1918 |
| Valve Gear | Baker |
| Locomotive Length and Weight | |
| Driver Wheelbase | 20.50' |
| Engine Wheelbase | 47.58' |
| Ratio of driving wheelbase to overall engine wheebase | 0.43 |
| Overall Wheelbase (engine & tender) | 90.33' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 264930 lbs |
| Engine Weight | 324000 lbs |
| Tender Light Weight | 224100 lbs |
| Total Engine and Tender Weight | 548100 lbs |
| Tender Water Capacity | 16000 gals |
| Tender Fuel Capacity (oil/coal) | 20 tons |
| Minimum weight per yard of rail on which locomotive could run | 88 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 57" |
| Boiler Pressure | 200 psi |
| Cylinders (dia x stroke) | 26" x 32" |
| Tractive Effort | 64516 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.11 |
| Heating Ability | |
| Firebox Area | 394.50 sq. ft |
| Grate Area | 66.70 sq. ft |
| Evaporative Heating Surface | 3504 |
| Superheating Surface | 835 |
| Combined Heating Surface | 4339 |
| Evaporative Heating Surface/Cylinder Volume | 178.19 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 13340 |
| Same as above plus superheater percentage | 16008 |
| Same as above but substitute firebox area for grate area | 94680 |
| Power L1 | 12553 |
| Power MT | 522.30 |
| This page last modified: . | [Contact] | All material © 1999-2008 SteamLocomotive.com |