Pennsylvania Railroad 1737 was a 4-6-2 Pacific type K4 class steam locomotive built in 1914 as the first of its class and would haul heavier passenger trains that the smaller E class 4-4-2 Atlantics could not handle such as the PRR's flagship passenger train, the Broadway Limited. In the 1930s, as the PRR had increased passenger service time tables, the trains became longer and heavier than a single K4s could handle, necessitating double-heading with a second engine. The "Standard Railroad Of The World" made attempts to replace the 1737 and its sisters with larger, more powerful classes including: K5, S1, and the T1, none of which were successful; thus, the K4s continued hauling passenger trains until the Pennsylvania Railroad replaced steam locomotives with the increasingly-popular and less-costly diesel-electric locomotives in 1957.
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Quick Facts Type and origin, Power type ...
Pennsylvania Railroad 1737 |
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PRR 1737 builder's photo. |
Type and origin |
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Power type | Steam |
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Builder | Altoona Works |
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Serial number | 2825 |
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Build date | May 1914 |
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Specifications |
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Configuration:
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• Whyte | 4-6-2 |
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Gauge | 4 ft 8+1⁄2 in (1,435 mm) |
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Leading dia. | 36 in (914 mm) |
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Driver dia. | 80 in (2,032 mm) |
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Trailing dia. | 50 in (1,270 mm) |
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Wheelbase | 13 ft 10 in (4.2 m) between driving axles |
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Length | 83 ft 6 in (25.5 m) |
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Axle load | 66,500 lb (30,200 kg; 30.2 t) |
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Adhesive weight | 199,500 lb (90,500 kg; 90.5 t) |
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Loco weight | 304,500 lb (138,100 kg; 138.1 t) |
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Tender weight | 212,725 lb (96,490 kg; 96.490 t) |
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Total weight | 517,225 lb (234,609 kg; 234.609 t) |
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Fuel type | Coal |
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Fuel capacity | 22 short tons (20 t) |
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Water cap. | 11,300 US gallons (43,000 L) |
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Firebox: | |
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• Grate area | 69.89 sq ft (6.49 m2) |
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Boiler pressure | 205 psi (1,413 kPa) |
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Heating surface | 4,041 square feet (375 m2) |
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Cylinder size | 27 in × 28 in (686 mm × 711 mm) |
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Valve gear | Walschaert |
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Valve type | Piston valves |
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