Class of 90 American 2-8-4 locomotives
Chesapeake & Ohio K-4 |
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Type and origin |
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Power type | Steam |
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Designer | Advisory Mechanical Committee |
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Builder | |
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Build date | 1943–1947 |
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Total produced | 90 |
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Specifications |
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Configuration:
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• Whyte | 2-8-4 |
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• UIC | 1′D2 h2 |
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Gauge | 4 ft 8+1⁄2 in (1,435 mm) |
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Leading dia. | 33 in (83.820 cm) |
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Driver dia. | 69 in (1.753 m) |
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Trailing dia. | 36 in (91.440 cm) (Lead) 43 in (109.220 cm) (Trail) |
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Tender wheels | 36 in (91.440 cm) |
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Minimum curve | 288 ft (88 m) radius / 20° |
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Wheelbase | 93 ft 2 in (28.40 m) |
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Length | 105 ft 1+7⁄8 in (32.05 m) |
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Width | 10 ft 10 in (3.30 m) |
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Height | 15 ft 7+1⁄2 in (4.76 m) |
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Axle load | 73,000 lb (37 short tons) to 73,600 lb (36.8 short tons) |
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Adhesive weight | 292,000 lb (146 short tons) to 293,100 lb (146.6 short tons) |
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Loco weight | 460,000 lb (230 short tons) to 469,680 lb (234.84 short tons) |
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Tender weight | 388,030 lb (194.02 short tons) to 394,100 lb (197.1 short tons) |
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Total weight | 850,000 lb (420 short tons) to 863,780 lb (431.89 short tons) |
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Tender type | 21-RG |
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Fuel type | Coal |
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Fuel capacity | 30 short tons (27 t) |
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Water cap. | 21,000 US gal (79,000 L; 17,000 imp gal) |
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Firebox: | |
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• Grate area | 90 sq ft (8.4 m2) |
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Boiler:
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• Model | Fire Tube |
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• Diameter | 98 in (2,489 mm) |
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• Tube plates | 19 ft (6 m) |
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Boiler pressure | 245 lbf (1.09 kN) |
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Feedwater heater | Worthington 5 1/2 SA 10,200 US gallon / hr capacity |
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Heating surface: | |
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• Firebox | 465 sq ft (43.2 m2) |
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• Tubes and flues | 4,308 sq ft (400.2 m2) |
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• Total surface | 4,773 sq ft (443.4 m2) |
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Superheater:
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• Type | Type E |
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• Heating area | 1,932 sq ft (179.5 m2) |
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Cylinders | Two, outside |
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Cylinder size | 26 in × 34 in (660 mm × 864 mm) |
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Valve gear | Baker |
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Valve type | Piston valves |
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Valve travel | 8 in (203 mm) |
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Valve lap | 1+11⁄16 in (43 mm) |
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Valve lead | 3⁄16 in (5 mm) |
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Train heating | Steam heat |
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Loco brake | Pneumatic, Schedule 8-ET |
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Train brakes | Pneumatic |
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Performance figures |
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Maximum speed | 80 mph (129 km/h) |
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Tractive effort | 69,350 lbf (308.48 kN) (Engine) 14,000 lbf (62.28 kN) (Booster) 83,350 lbf (370.76 kN) (Total) |
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Factor of adh. | 4.21-4.23 (Engine) 4.6 (Booster) |
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Career |
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Operators | Chesapeake and Ohio Railway |
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Numbers | 2700–2789 |
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Nicknames | Kanawha Big Mike |
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Retired | 1952–1957 |
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Preserved | Twelve (Nos. 2700, 2705, 2707, 2716, 2727, 2732, 2736, 2755, 2756, 2760, 2776, 2789) preserved; remainder scrapped |
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Restored | Ongoing with No. 2716 |
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Disposition | No. 2716 undergoing restoration, 11 on display, remainder scrapped |
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10 preserved built by ALCO and 2 preserved built by Lima |
The Chesapeake and Ohio Railway's K-4 class were a group of ninety 2-8-4 steam locomotives purchased during and shortly after World War II.[1] Unlike many other railroads in the United States, the C&O chose to nickname this class "Kanawha", after the river in West Virginia, rather than "Berkshire", after the region in New England.
Several examples survive today, including at the National Railroad Museum, Science Museum of Virginia, Chief Logan State Park, and B&O Railroad Museum.