British Rail Class 170

The British Rail Class 170 Turbostar is a British diesel multiple unit (DMU) passenger train designed and built by Adtranz, and later by Bombardier Transportation, at Derby Litchurch Lane Works.

British Rail Class 170
Turbostar
A ScotRail Class 170 at Edinburgh
The interior of a ScotRail refurbished Class 170
In service30 May 1999  present
Manufacturer
Built atDerby Litchurch Lane Works
Family nameTurbostar
Replaced
Constructed1998–2005
Number built139
Number in service
Formation2 or 3 cars per unit
Owners
Operators
Specifications
Car body constructionWelded aluminium, with steel body ends
Car length
  • DM vehs.: 23.62 m (77 ft 6 in)
  • MS vehs.: 23.61 m (77 ft 6 in)
Width2.69 m (8 ft 10 in)
Height3.77 m (12 ft 4 in)
DoorsDouble-leaf sliding plug (2 per side per car)
Maximum speed100 mph (160 km/h)
Prime mover(s)2 or 3 × MTU 6R183TD13H (one per car)
Engine typeInline-6 4-stroke turbo-diesel
Power output315 kW (422 hp) per engine
TransmissionVoith T211rzze hydrokinetic (one per vehicle)
Accelerationmax. 0.5 m/s2 (1.6 ft/s2)
Bogies
  • Adtranz/Bombardier
  • Powered: P3-23
  • Unpowered: T3-23
Braking system(s)Electro-pneumatic (disc)
Safety system(s)
Coupling systemBSI
Multiple workingWithin class, plus Classes 14x and 15x
Track gauge1,435 mm (4 ft 8+12 in) standard gauge

The Class 170 was derived from the British Rail Class 165 and 166 DMUs, known as the Networker Turbos, of the 1990s. The first units were introduced to service in 1999, shortly after the privatisation of British Rail; they have been commonly used to operate regional as well as long-distance services, and to a lesser extent suburban services. A total of 139 units were built, but some were later converted to Class 168 and Class 171 units. These trains are currently in use with CrossCountry, East Midlands Railway, ScotRail and Northern Trains.

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