| Mastodon |
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 CPR #229, Mastodon, as she would have appeared in about 1885 |
| Type and origin |
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| Power type | Steam |
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| Builder | Central Pacific's Sacramento, California, shops |
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| Serial number | 20 |
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| Build date | April 1882 |
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| Specifications |
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Configuration:
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| • Whyte | 4-8-0 |
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| Gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
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| Driver dia. | 55 in (1,397 mm) |
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| Adhesive weight | 81,000 lb (37,000 kg) |
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| Loco weight | 105,850 lb (48,010 kg) |
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| Fuel capacity | 10,700 lb (4,900 kg) |
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| Water cap. | 2,500 US gal (9,500 L; 2,100 imp gal) |
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| Boiler pressure | 135 psi (930 kPa) |
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| Heating surface | 1,355.3 sq ft (125.91 m2) |
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| Cylinder size | 19 in × 30 in (483 mm × 762 mm) dia × stroke |
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Mastodon was the unofficial name of the Central Pacific Railroad's number 229, the world's first successful 4-8-0 steam locomotive.
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