Brake Standard Open

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British Rail Brake Standard Open
BR Mk1 BSO.jpg
In service1955–
ManufacturerMark 1: BR Doncaster, Wolverton and Gloucester RCW
Mark 2: BR Derby
Family name British Railways Mark 1,
British Rail Mark 2
ConstructedMark 1: 1955–1963
Mark 2: 1966–1974
Number built340
Fleet numbers9200–9539
CapacityMark 1: 39
Mark 2/A–D: 31
Mark 2E/F: 32
Operator(s) British Rail
Specifications
Car length66 ft 0 in (20.12 m)
Width9 ft 3 in (2.82 m)
Height12 ft 9+12 in (3.90 m)
Maximum speed90–100 mph (145–161 km/h)
Weight33 long tons (34 t; 37 short tons)
Train ventilation Steam, Electric or both
Bogies BR1, Commonwealth, or B4
Braking system(s) Vacuum, Air, or both
Coupling system Drop-head knuckle coupler on draw-hook
Track gauge 4 ft 8+12 in (1,435 mm) standard gauge

A Brake Standard Open or BSO, is a type of railway carriage used by British Rail. Both Mark 1 and Mark 2 types were built. Each consists of a standard class open passenger saloon with a centre aisle, a guard's compartment with hand brake and a lockable luggage compartment.

Contents

A number of Mark 1 and Mark 2 BSOs were converted to Brake Standard Open (Micro-Buffet) (BSOT), and fourteen Mark 2 BSOs were converted to Driving Brake Standard Open (DBSO). A number of BSO and BSOT coaches have been preserved, and some are still in use on main line charters. One significant survivor is No. 9267, the last surviving coach in the final excursion train on the Somerset & Dorset line on 6 March 1966, which is appropriately located at Midsomer Norton. [1]

Orders

Lot No.DiagramMarkBuiltBuilderQtyFleet numbersNotes
3017018311955–1956Doncaster779200–9276BR1 bogies
3024418311956Doncaster459277–9321BR1 bogies
3044318311959 Gloucester 419322–9362BR1 bogies
3069818411963Wolverton189363–9380Commonwealth bogies, fluorescent lighting
3075718521966 Derby 369381–9416B4 bogies
307771802A1967 Derby 99417–9425B4 bogies
307881802A1968 Derby 139426–9438B4 bogies
307981862C1970 Derby 109439–9448B4 bogies
308201862C1970 Derby 309449–9478B4 bogies
308241872D1971 Derby 179479–9495B4 bogies
303831882E1972 Derby 149496–9509B4 bogies
308611892F1974 Derby 309510–9539B4 bogies

See also

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References

  1. "BR 9267 Mk 1 Brake Second Open built 1956".