BR Standard Class 7 70000 Britannia

BR 70000 Britannia
Britannia approaching Bath, while on the Cathedrals Express railtour in 2012
Type and origin
Power typeSteam
BuilderBritish Railways Crewe works
Build date2 January 1951
Specifications
Configuration:
​
 • Whyte4-6-2
 • UIC2′C1′h2
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.6 ft 2 in (1.880 m)
Trailing dia.3 ft 3+1⁄2 in (1.003 m)
Length68 ft 9 in (20.96 m)
Width8 ft 8+3⁄4 in (2.66 m)
Height13 ft 0+1⁄2 in (3.98 m)7004
Axle load20.50 long tons (20.83 t; 22.96 short tons)
Adhesive weight61.50 long tons (62.49 t; 68.88 short tons)
Loco weight94.00 long tons (95.51 t; 105.28 short tons)
Tender weight49.15 long tons (49.94 t; 55.05 short tons)
Tender typeBR1
Fuel typecoal
Fuel capacity7.0 long tons (7.1 t; 7.8 short tons)
Water cap.4,250 imp gal (19,300 L; 5,100 US gal)
Firebox:​
 • Grate area42 sq ft (3.9 m2)
BoilerBR1
Boiler pressure250 psi (1.72 MPa)
Heating surface:​
 • Firebox210 sq ft (20 m2)
 • Tubes and flues2,264 sq ft (210.3 m2)
Superheater:
​
 • Heating area718 sq ft (66.7 m2)
CylindersTwo, outside
Cylinder size20 in × 28 in (508 mm × 711 mm)
Performance figures
Tractive effort32,150 lbf (143.0 kN)
Factor of adh.4.23
Career
OperatorsBritish Railways
ClassStandard Class 7
Power class7MT
Number in class1st of 55
Numbers70000
Official nameBritannia
RetiredMay 1966
Current ownerRoyal Scot Locomotive and General Trust
DispositionPreserved
Official Website - Britannia on Icons Of Steam

British Railways Standard Class 7 'Britannia Class' No. 70000 Britannia is a preserved steam locomotive, owned by the Royal Scot Locomotive and General Trust.

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