Russian locomotive class U

Russian locomotive class У [U]
Russian locomotive class U, number 127 (preserved)
Type and origin Power type Steam Builder Putilov factory Build date 1906–1912 Total produced 62
Specifications Configuration: ​  • Whyte 4-6-0  • UIC 2'C n4v Gauge 1,524 mm (5 ft) Leading dia. 950 mm (3 ft 1+3⁄8 in) Driver dia. 1,730 mm (5 ft 8+1⁄8 in) Length U: 11.032 m (36 ft 2+1⁄4 in) Uu: 11.369 m (37 ft 3.6 in) Height 5,080 mm (16 ft 8 in) Axle load 15.2 tonnes (15.0 long tons; 16.8 short tons) 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) 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) Fuel type Fuel oil or coal Firebox: ​  • Grate area 2.72 m2 (29.3 sq ft) Boiler pressure 14.0 kg/cm2 (1.37 MPa; 199 psi) Heating surface U: 182 m2 (1,960 sq ft) Uu: 151.9 m2 (1,635 sq ft) Cylinders Four, compound 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) Low-pressure cylinder 580 mm × 650 mm (22+13⁄16 in × 25+9⁄16 in)
Performance figures Maximum speed 115 km/h (71 mph)
Career Disposition U-127 preserved at the Museum of the Moscow Railway

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