| Pennsylvania Railroad J1 |
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| Type and origin |
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| Power type | Steam |
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| Builder | PRR Altoona Works |
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| Build date | 1942–1944 |
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| Total produced | 125 |
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| Specifications |
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Configuration:
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| • Whyte | 2-10-4 |
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| • UIC | 1′E2′ h |
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| Gauge | 4 ft 8+1⁄2 in (1,435 mm) |
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| Driver dia. | 69 in (1.753 m), later 70 in (1.778 m) |
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| Length | 117 ft 8 in (35.86 m) |
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| Width | 11 ft 3 in (3.43 m) |
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| Height | 16 ft 5.5 in (5.02 m) |
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| Adhesive weight | 377,800 lb (171.4 t) |
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| Loco weight | J-1 class: 589,975 lb (267.6 t)
J-1a class: 579,975 lb (263.1 t) |
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| Tender weight | 411,500 lb (186.7 t) |
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| Total weight | J-1 class: 1,001,475 lb (454.3 t)
J-1a class: 991,475 lb (449.7 t) |
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| Tender type | Coast-to-Coast |
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| Fuel type | Coal |
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| Fuel capacity | 60,000 lb (27.2 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 | 122 sq ft (11.3 m2) |
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| Boiler | 106 in (2,692 mm) |
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| Boiler pressure | 270 psi (1.86 MPa) |
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| Cylinders | Two |
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| Cylinder size | 29 in × 34 in (737 mm × 864 mm) |
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| Valve gear | Baker |
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| Performance figures |
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| Maximum speed | 50 mph |
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| Power output | 5,644 hp (4,209 kW) |
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| Tractive effort | 95,100 lbf (423.0 kN)
Booster: 15,000 lb (6.8 t)
Loco w/Booster: 110,100 lb (49.9 t) |
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| Career |
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| Numbers | 6150–6174, 6401–6500 |
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| Nicknames | War Babies |
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| Locale | Pennsylvania Railroad |
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| Retired | 1958-1959 |
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| Scrapped | 1958-1959 |
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| Disposition | All scrapped
- Number 6435 rumored to be buried
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The PRR J1 was a class of 2-10-4 "Texas" type steam locomotives built between 1942 and 1944. The J1 had over 95,000 pounds-force (422.6 kN) of tractive effort, plus an additional 15,000 lbf (66.7 kN) if the booster engine was used.
