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British Rail Class 172
The British Rail Class 172 is a British diesel multiple unit (DMU) passenger train from the Turbostar family, built by Bombardier Transportation's Derby Litchurch Lane Works for use on inner-suburban passenger services. The entire class is currently operated by West Midlands Trains.
The Class 172 is part of the Turbostar range, similar to the Class 168, Class 170 and Class 171.
There are four sub-classes, all with West Midlands Trains for use on the Snow Hill Lines and Leamington Spa - Nuneaton:
The 172/0s and 172/1s resemble the existing Turbostar trains in not having end gangways. These trains have a maximum speed of 100 mph (160 km/h).
The Class 172/2s and 172/3s used by West Midlands Trains resemble the Class 375, Class 377, Class 379 and Class 387 Electrostars by having end gangways to allow access between units. These also resemble the Class 378 by having more of a 'Capitalstar' style front design rather than the typical 'Electrostar' front design. These trains have a maximum speed of 100 mph (160 km/h).
The 172/0s were built without any onboard toilets, in common with other London Overground stock. Toilets were retrofitted when transferred to WMT.
The Class 172s feature BSI (Bergische Stahl Industrie - Autocoupler) couplers which allow them to work in multiple with Class 168, Class 170 units and most other units with the same coupler.
The Class 172 trains are lighter than other Turbostars, due to use of the Bombardier FLEXX-ECO bogies - a development of the B5000 bogies used on the Class 220 Voyager DEMU trains, rather than the previous 'Series 3' bogies. Another difference is that they have half-height airdams as opposed to the more standard full height airdams. They also differ from earlier Turbostars in having mechanical transmission rather than hydraulic - gear changes can be distinctly heard as the trains accelerate and decelerate.
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British Rail Class 172
The British Rail Class 172 is a British diesel multiple unit (DMU) passenger train from the Turbostar family, built by Bombardier Transportation's Derby Litchurch Lane Works for use on inner-suburban passenger services. The entire class is currently operated by West Midlands Trains.
The Class 172 is part of the Turbostar range, similar to the Class 168, Class 170 and Class 171.
There are four sub-classes, all with West Midlands Trains for use on the Snow Hill Lines and Leamington Spa - Nuneaton:
The 172/0s and 172/1s resemble the existing Turbostar trains in not having end gangways. These trains have a maximum speed of 100 mph (160 km/h).
The Class 172/2s and 172/3s used by West Midlands Trains resemble the Class 375, Class 377, Class 379 and Class 387 Electrostars by having end gangways to allow access between units. These also resemble the Class 378 by having more of a 'Capitalstar' style front design rather than the typical 'Electrostar' front design. These trains have a maximum speed of 100 mph (160 km/h).
The 172/0s were built without any onboard toilets, in common with other London Overground stock. Toilets were retrofitted when transferred to WMT.
The Class 172s feature BSI (Bergische Stahl Industrie - Autocoupler) couplers which allow them to work in multiple with Class 168, Class 170 units and most other units with the same coupler.
The Class 172 trains are lighter than other Turbostars, due to use of the Bombardier FLEXX-ECO bogies - a development of the B5000 bogies used on the Class 220 Voyager DEMU trains, rather than the previous 'Series 3' bogies. Another difference is that they have half-height airdams as opposed to the more standard full height airdams. They also differ from earlier Turbostars in having mechanical transmission rather than hydraulic - gear changes can be distinctly heard as the trains accelerate and decelerate.