Chesapeake and Ohio classes L-2 and L-2-A
      C&O L-2| 
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| Specifications | 
|---|
 | Configuration | 
4-6-4 | 
|---|
 | UIC class | 
2′C2′ h2 | 
|---|
 | Gauge | 
4 ft 8 1⁄2 in (1,435 mm) standard gauge | 
|---|
 | Driver diameter | 
78 in (1.981 m) | 
|---|
 | Length | 
108 ft 0 in (32.92 m) | 
|---|
 | Adhesive weight | 
219,500 lb (99,600 kg; 99.6 t) | 
|---|
 | Loco & tender weight | 
893,000 lb (405,000 kg; 405 t) | 
|---|
 | Fuel type | 
Coal | 
|---|
 | Fuel capacity | 
60,000 lb (27,000 kg; 27 t) | 
|---|
 | Water cap | 
21,000 US gallons (79,000 l; 17,000 imp gal) | 
|---|
 Firebox:  • Firegrate area | 
90 sq ft (8.4 m2) | 
|---|
 | Boiler pressure | 
255 psi (1.76 MPa) | 
|---|
 | Heating surface | 
4,233 sq ft (393.3 m2) | 
|---|
 Superheater:  • Heating area | 
1,810 sq ft (168.2 m2) | 
|---|
 | Cylinders | 
Two | 
|---|
 | Cylinder size | 
25 in × 30 in (635 mm × 762 mm) | 
|---|
 
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C&O L-2-A
| Type and origin | 
|---|
 | 
Only differences from L-2 above are shown |  | Power type | 
Steam | 
|---|
 | Builder | 
Baldwin Locomotive Works | 
|---|
 | Build date | 
1947 | 
|---|
 | Total produced | 
5 | 
|---|
 
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The Chesapeake and Ohio Railway's class L-2 comprised eight coal-fired 4-6-4 "Hudson" type steam locomotives numbered #300–307 and built by the Baldwin Locomotive Works of Philadelphia, Pennsylvania in 1941.  They had roller bearings on all axles, and the first-built, #300, had roller bearings on its side and main rods too.  #300 also bore "Elephant ear" smoke deflectors from 1948.
In 1947, the C&O ordered five additional and very similar locomotives, numbering them #310–314; these were class L-2-A and differed mostly in using Franklin RC poppet valves instead of the Baker valve gear of the L-2s.  These were the last express passenger steam locomotives ordered by a United States railroad, and some of the most expensive at $353,346 each, 80% more than the cost of the 8 earlier L-2 locomotives.
Both classes were among the largest 4-6-4s ever built.  They were intended to work the C&O's top-flight express trains on level ground; the railroad purchased 4-8-4 "Greenbrier" types for mountain service.
By 1953, C&O passenger services were wholly dieselized, and there was no more work for these locomotives to do.  Hudsons were very unsuited to freight work, with such a comparatively small proportion of their weight on the drivers.  All were quickly scrapped.
Notes
-  ^  Huddleston, Eugene L. (Jan–Feb 2002). "The outstanding features and many lives of C&O 614". Chesapeake and Ohio Historical Magazine.