British Rail Classes 101 and 102

British Rail Classes 101 and 102
British Rail Classes 101 and 102
	A Class 101 at Reading in 1989
	Interior of 101654
In service	1956–2003
Manufacturer	Metropolitan Cammell
Order no.	30467 (DMBS, 51174-51253); 30500 (DMBS, 51425-51470); 30501 (DMCL, 51495-51540); 30587 (DMCL, 51795-51801); 30588 (DMCL, 51802-51808); 30249 (DMCL, 53138-53150); 30252 (DMBS, 53153-53157); 30253 (DMCL, 53158-53163); 30254 (DMBS, 53164-53166); 30255 (DMCL, 53168-53171); 30256 (DMCL, 53172-53197); 30259 (DMBS, 53198-53208); 30261 (DMBS, 53211-53233); 30263 (DMCL, 53234-53245); 30339 (DMBS, 53247-53248); 30266 (DMBS, 53250-53259); 30267 (DMCL, 53260-53269); 30270 (DMBS, 53290-53296); 39275 (DMBS, 53303-53320); 30276 (DMCL, 53321-53338); 30271 (DMCL, 53746-53751); 30260 (DTCL, 54050-54092); 30340 (DTCL, 54218-54220); 30468 (DTCL, 54332-54409); 30250 (TSL, 59042-59048); 30251 (TBSL, 59049-59055); 30257 (TSL, 59060-59072); 30258 (TBSL, 59073-59085); 30264 (TSL, 59086-59091); 30265 (TBSL, 59092-59097); 30269 (TSL, 59101-59107); 30274 (TBSL, 59112-59113); 30277 (TCL, 59114-59130); 30273 (TSL, 59302-59306); 30502 (TCL, 59525-59568); 30510 (TSL, 59569-59571); 30589 (TCL, 59686-59692);
Family name	First generation
Replaced	Steam locomotives and carriages
Constructed	1956–1960
Entered service	1956
Number built	Class 101: 527 (DMCL: 97, DMBS: 217, DTCL: 120, TSL: 41, TSLRB: 6, TCL: 18, TBSL: 28); Class 102: 106 (DMCL: 53, TCL: 53)
Number preserved	41 cars
Formation	2-, 3-, or 4-car sets
Operators	British Rail; Network SouthEast; ScotRail; First North Western
Depots	Ayr; Bristol Bath Road; Buxton; Cambridge; Cardiff Canton; Chester; Crown Point; Derby Etches Park; Eastfield; Haymarket; Heaton; Hull Botanic Gardens; Longsight; Landore; Neville Hill; Old Oak Common; Reading; Tyseley;
Specifications
Car length	57 ft 0 in (17.37 m)
Width	9 ft 3 in (2.82 m)
Height	3.77 m (12 ft 4 in)
Maximum speed	70 mph (113 km/h)
Weight	32.5 tonnes (32.0 long tons; 35.8 short tons) (powered),; 25 tonnes (25 long tons; 28 short tons) (unpowered)
Prime mover(s)	Two BUT (AEC or Leyland) 6-cylinder diesels
Power output	150 bhp (112 kW) each engine
Transmission	Mechanical: 4-speed epicyclic gearbox
Braking system(s)	Vacuum
Coupling system	Screw-link couplings, British Standard gangways
Multiple working	■ Blue Square
Track gauge	4 ft 8+1⁄2 in (1,435 mm)

The British Rail Classes 101 and 102 diesel-mechanical multiple units were built by Metro-Cammell at Washwood Heath in Birmingham, England from 1956 to 1959, following construction of a series of prototype units. These classes proved to be some of the most successful and longest-lived of BR's First Generation DMUs, second in longevity only to the Class 121, with the final five units being withdrawn on 24 December 2003. The oldest set was, by then, just over 47 years old.

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