| Russian locomotive class У [U] |
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Russian locomotive class U, number 127 (preserved) |
| Type and origin |
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| Power type | Steam |
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| Builder | Putilov factory |
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| Build date | 1906–1912 |
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| Total produced | 62 |
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| Specifications |
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Configuration:
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| • Whyte | 4-6-0 |
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| • UIC | 2'C n4v |
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| Gauge | 1,524 mm (5 ft) |
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| Leading dia. | 950 mm (3 ft 1+3⁄8 in) |
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| Driver dia. | 1,730 mm (5 ft 8+1⁄8 in) |
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| Length | - U: 11.032 m (36 ft 2+1⁄4 in)
- Uu: 11.369 m (37 ft 3.6 in)
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| Height | 5,080 mm (16 ft 8 in) |
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| Axle load | 15.2 tonnes (15.0 long tons; 16.8 short tons) |
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| Adhesive weight | - U: 45.4 tonnes (44.7 long tons; 50.0 short tons)
- Uu: 48.9 tonnes (48.1 long tons; 53.9 short tons)
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| Loco weight | - U: 72.1 tonnes (71.0 long tons; 79.5 short tons)
- Uu: 76.1 tonnes (74.9 long tons; 83.9 short tons)
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| Fuel type | Fuel oil or coal |
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| Firebox: | |
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| • Grate area | 2.72 m2 (29.3 sq ft) |
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| Boiler pressure | 14.0 kg/cm2 (1.37 MPa; 199 psi) |
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| Heating surface | - U: 182 m2 (1,960 sq ft)
- Uu: 151.9 m2 (1,635 sq ft)
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| Cylinders | Four, compound |
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| High-pressure cylinder | - U: 370 mm × 650 mm (14+9⁄16 in × 25+9⁄16 in)
- Uu: 410 mm × 650 mm (16+1⁄8 in × 25+9⁄16 in)
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| Low-pressure cylinder | 580 mm × 650 mm (22+13⁄16 in × 25+9⁄16 in) |
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| Performance figures |
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| Maximum speed | 115 km/h (71 mph) |
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The Russian locomotive class U (Russian: У) was a Russian express passenger steam locomotive type. The class U was a 4-6-0 four-cylinder compound locomotive which used de Glehn compound system.
One unit, Locomotive U-127 was preserved as part of a memorial to Vladimir Lenin, at the Museum of the Moscow Railway
