British Rail Class 171
| British Rail Class 171 Turbostar | |
|---|---|
Southern Class 171/8 No. 171804 arrives at London Bridge
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The interior of Standard Class accommodation aboard a Southern Railway Class 171
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| In service | 2003 - Present |
| Manufacturer | Bombardier Transportation, Derby, UK |
| Family name | Turbostar |
| Replaced | |
| Constructed | 2003 - 2004 |
| Number built | 20 trainsets |
| Formation | 2/4 cars per trainset |
| Fleet numbers |
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| Capacity |
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| Operator(s) | GTR Southern |
| Specifications | |
| Car length | 23.62 m (77 ft 6 in) |
| Width | 2.69 m (8 ft 10 in) |
| Height | 3.77 m (12 ft 4 in) |
| Maximum speed | 100 mph (160 km/h) |
| Weight |
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| Prime mover(s) | One MTU 6R 183TD diesel per car |
| Power output | 422 hp (315 kW) |
| Transmission | Voith Hydraulic T211rzze 2 axles driven per car |
| Braking system(s) | Air |
| Safety system(s) | AWS, TPWS, GSM-R |
| Coupling system | BSI coupling replaced by Dellner coupling |
| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) standard gauge |
The Class 171 Turbostar is a type of diesel multiple unit (DMU) train built by Bombardier Transportation (previously ADtranz) at its Litchurch Lane Works in Derby, England, which is identical to the Class 170, except for the replacement of the BSI (Bergische Stahl Industrie) coupler with a Dellner coupling. This provision was made to allow emergency joining with Class 377 DC third-rail electric units. The vehicles work on the southern regions of the British railway system, operating services from London Bridge to Uckfield and from Brighton to Ashford International, these routes being unelectrified between Hurst Green and Uckfield and Ore and Ashford International, respectively.
The fleet are operated by Govia Thameslink Railway (GTR) for Southern services.
The Southern fleet is fitted with coupling devices (Dellner) different from other Turbostars, and is classified as Class 171 for this reason. The four-car units were built with the new couplers, but Class 170 two-car units were fitted at a later date, and reclassified as Class 171/7 after the modification. Three more two-car units were later acquired, but these were built from new with the new couplers.
Southern gained 170 392 from South West Trains. The coupler on this unit has also been changed to the Dellner type. The unit has been reclassified and renumbered from 170 392 to 171 730. This unit was first delivered carrying Southern livery and the number 170 727 (because SWT needed another 170 and it was cheaper to place another unit on the Southern order than place a new order). It never operated in this form and was transferred to South West Trains where it became 170 392.
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