Had slightly more tractive effort than the L-2s, which were USRA designs. Operated until 1948-1950.
Standard USRA design based on N&W Y-2 Mallet compound locomotive and delivered to the Clinchfield in 1919. Unlike the light articulateds, the "heavy" was considered a great success. These had 14" piston valves on all cylinders.
Ten more entered service in 1923 as L-3 (Locobase 1321). This class operated until 1950-1952.
Follow-ups to the earlier 10 built to the USRA heavy articulated design (Locobase 1320). These were essentially similar, but came from Brooks rather than Baldwin. Operated until 1951-1952.
| Specifications | |||
|---|---|---|---|
| Class | L-1 | L-2 | L-3 |
| Locobase ID | 1318 | 1320 | 1321 |
| Railroad | Carolina, Clinchfield & Ohio | Carolina, Clinchfield & Ohio | Carolina, Clinchfield & Ohio |
| Whyte | 2-8-8-2 | 2-8-8-2 | 2-8-8-2 |
| Road Numbers | 700-706 | 725-734 | 735-744 |
| Gauge | Std | Std | Std |
| Builder | Baldwin | Baldwin | Brooks |
| Year | 1919 | 1919 | 1923 |
| Valve Gear | Baker | Baker | Walschaert |
| Locomotive Length and Weight | |||
| Driver Wheelbase | 18.50' | 15.50' | 15.50' |
| Engine Wheelbase | 57.33' | 57.33' | 57.33' |
| Ratio of driving wheelbase to overall engine wheebase | 0.32 | 0.27 | 0.27 |
| Overall Wheelbase (engine & tender) | 95.92' | 93.25' | 93.25' |
| Axle Loading (Maximum Weight per Axle) | 60700 lbs | 62000 lbs | |
| Weight on Drivers | 467000 lbs | 478000 lbs | 486500 lbs |
| Engine Weight | 523600 lbs | 531000 lbs | 541000 lbs |
| Tender Light Weight | 314000 lbs | 214000 lbs | 209000 lbs |
| Total Engine and Tender Weight | 837600 lbs | 745000 lbs | 750000 lbs |
| Tender Water Capacity | 12000 gals | 12000 gals | 12000 gals |
| Tender Fuel Capacity (oil/coal) | 23 tons | 16 tons | 16 tons |
| Minimum weight per yard of rail on which locomotive could run | 97.29 lb rail | 99.58 lb rail | 101.35 lb rail |
| Geometry Relating to Tractive Effort | |||
| Driver Diameter | 57" | 57" | 57" |
| Boiler Pressure | 200 psi | 240 psi | 240 psi |
| Cylinders (dia x stroke) | 28" x 32" | 25" x 32" | 25" x 32" |
| Low Pressure Cylinders (dia x stroke) | 42" x 32" | 39" x 32" | 39" x 32" |
| Tractive Effort | 103602 lbs | 101465 lbs | 101465 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.51 | 4.71 | 4.79 |
| Heating Ability | |||
| Firebox Area | 435 sq. ft | 435 sq. ft | |
| Grate Area | 96 sq. ft | 96 sq. ft | 96 sq. ft |
| Evaporative Heating Surface | 6120 | 6120 | |
| Superheating Surface | 1475 | 1475 | |
| Combined Heating Surface | 0 | 7595 | 7595 |
| Evaporative Heating Surface/Cylinder Volume | 336.62 | 336.62 | |
| Computations Relating to Power Output (More Information) | |||
| Robert LeMassena's Power Computation | 19200 | 23040 | 23040 |
| Same as above plus superheater percentage | 19200 | 27514.52 | 27514.52 |
| Same as above but substitute firebox area for grate area | 0 | 124675.18 | 124675.18 |
| Power L1 | 0 | 11115.52 | 11115.52 |
| Power MT | 0 | 410.13 | 402.97 |
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