| Great Northern 2507 |
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| Type and origin |
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| Power type | Steam |
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| Builder | Baldwin Locomotive Works |
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| Serial number | 57184 |
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| Model | Baldwin 14-52-1⁄4-E, (#8) |
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| Build date | October 1923 |
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| Specifications |
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Configuration:
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| • Whyte | 4-8-2 |
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| • UIC | 2′D2′ h1 |
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| Gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
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| Leading dia. | 33 in (838 mm) |
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| Driver dia. | 73 in (1,854 mm) |
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| Trailing dia. | 45 in (1,143 mm) |
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| Tender wheels | 33 in (838 mm) |
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| Wheelbase | 83.04 ft (25,311 mm) |
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| Axle load | 66,250 lb (30,050 kilograms; 30.05 metric tons) |
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| Adhesive weight | 265,000 lb (120,000 kilograms; 120 metric tons) |
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| Loco weight | 388,700 lb (176,300 kilograms; 176.3 metric tons) |
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| Tender weight | 305,950 lb (138,780 kilograms; 138.78 metric tons) |
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| Total weight | 694,650 lb (315,090 kilograms; 315.09 metric tons) |
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| Tender type | Vanderbilt |
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| Fuel type | Fuel oil |
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| Fuel capacity | 5,800 US gal (22,000 L; 4,800 imp gal) oil |
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| Water cap. | 15,000 US gal (57,000 L; 12,000 imp gal) |
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| Firebox: | |
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| • Grate area | 88 sq ft (8.2 m2) |
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| Boiler | 84 in (2,100 mm) |
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| Boiler pressure | 210 lbf/in2 (1.45 MPa) (as built 200 lbf/in2 (1.38 MPa)) |
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| Heating surface: | |
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| • Firebox | 400 sq ft (37 m2) |
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| Cylinders | Two |
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| Cylinder size | 29 in × 28 in (737 mm × 711 mm) |
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| Valve gear | Walschaert |
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| Performance figures |
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| Maximum speed | 50 mph (80 km/h) (limited) |
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| Tractive effort | 57,580 lbf (256.13 kN) (as built 54,838 lbf (243.9 kN)) |
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| Factor of adh. | 4.13 (as built 4.34) |
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Great Northern 2507 (GN 2507) is a 4-8-2 "Mountain" type steam locomotive, a member of the P-2 class.[1] Built for passenger service, the locomotive was assigned to pull the Great Northern's mainline passenger trains such as the Empire Builder and Oriental Limited, until being retired in December 1957 and sold to Spokane, Portland and Seattle Railway.[1] GN 2507 is one of only two surviving examples of a P-2 class locomotive[1] and, since 2003, has been on display at Wishram station in Wishram, Washington.[2][3]
