These were enormous compound articulateds intended for pusher and hump yard service ; they were designed to work on grades up to 5% and on curves with radii up to 18 deg. So small were the drivers that the leading LP cylinders showed a perceptible rake (1 in 35) to ensure that they'd clear the rail as the front engine traversed in curves. All 4 cylinders were supplied by 14" piston valves
Baldwin produced them as singles over a 5-month period from April to September (works numbers were 51716, 51867, 51904, 51938, 51973, 51994, 52054, 52227, 52291, 52372).
Although deprived of the usual Belpaire boiler, the giant switchers proved quite satisfactory and remained in service until the late 1940s. The first was sold for scrap in October 1947, the last in April 1949.
| Specifications | |
|---|---|
| Class | CC2s |
| Locobase ID | 9498 |
| Railroad | Pennsylvania (PRR) |
| Whyte | 0-8-8-0 |
| Road Numbers | 3700 |
| Gauge | Std |
| Builder | Baldwin |
| Year | 1919 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase | 14.75' |
| Engine Wheelbase | 40.12' |
| Ratio of driving wheelbase to overall engine wheebase | 0.37 |
| Overall Wheelbase (engine & tender) | 78.71' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 458140 lbs |
| Engine Weight | 458140 lbs |
| Tender Light Weight | 191860 lbs |
| Total Engine and Tender Weight | 650000 lbs |
| Tender Water Capacity | 10000 gals |
| Tender Fuel Capacity (oil/coal) | 20 tons |
| Minimum weight per yard of rail on which locomotive could run | 95 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 51" |
| Boiler Pressure | 225 psi |
| Cylinders (dia x stroke) | 26" x 28" |
| Low Pressure Cylinders (dia x stroke) | 40" x 28" |
| Tractive Effort | 99796 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.59 |
| Heating Ability | |
| Firebox Area | 391 sq. ft |
| Grate Area | 96.30 sq. ft |
| Evaporative Heating Surface | 5030 |
| Superheating Surface | 1406 |
| Combined Heating Surface | 6436 |
| Evaporative Heating Surface/Cylinder Volume | 292.34 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 21668 |
| Same as above plus superheater percentage | 26434 |
| Same as above but substitute firebox area for grate area | 107330 |
| Power L1 | 9223 |
| Power MT | 355.06 |
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