Russian locomotive class U

Russian locomotive class У [U]
Russian locomotive class U, number 127 (preserved)
Type and origin
Power typeSteam
BuilderPutilov factory
Build date1906–1912
Total produced62
Specifications
Configuration:
 • Whyte4-6-0
 • UIC2'C n4v
Gauge1,524 mm (5 ft)
Leading dia.950 mm (3 ft 1+38 in)
Driver dia.1,730 mm (5 ft 8+18 in)
Length
  • U: 11.032 m (36 ft 2+14 in)
  • Uu: 11.369 m (37 ft 3.6 in)
Height5,080 mm (16 ft 8 in)
Axle load15.2 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 typeFuel oil or coal
Firebox:
 • Grate area2.72 m2 (29.3 sq ft)
Boiler pressure14.0 kg/cm2 (1.37 MPa; 199 psi)
Heating surface
  • U: 182 m2 (1,960 sq ft)
  • Uu: 151.9 m2 (1,635 sq ft)
CylindersFour, compound
High-pressure cylinder
  • U: 370 mm × 650 mm (14+916 in × 25+916 in)
  • Uu: 410 mm × 650 mm (16+18 in × 25+916 in)
Low-pressure cylinder580 mm × 650 mm (22+1316 in × 25+916 in)
Performance figures
Maximum speed115 km/h (71 mph)
Career
DispositionU-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