Technical Details
All coaches are equipped with a Cummins QSK19 diesel engine of 750 hp (560 kW) at 1800rpm. These power a generator which supplies current to motors driving two axles per coach, with one axle per bogie powered.
Voyagers have both air and rheostatic brakes. They are fitted with Dellner couplers, like the Class 390 Pendolino electric trains used by Virgin West Coast meaning they can be coupled in rescue/recovery mode (air brake only) in the event of a failure. 220s and 221s can also be easily assisted by Dellner fitted Class 57s (Thunderbirds) in the event of a failure. By use of adaptive couplings a failed 220 or 221 can also be assisted by any air braked locomotive such as a Class 37, 47 or 66 or even an HST.
The Class 220s and closely related Class 222s have B5005 bogies which are distinctive as they are of inside frame design and hence the axles are supported by bearings behind the wheels, meaning the outside face of the wheel is visible. The related Class 221 Super Voyager has outside frame bogies and hence have a more conventional appearance.
The Class 220s operate in four coach sets with a carriage mass of between 45 and 48 tonnes and a total train weight of 185.6 tonnes, a top speed of 125 mph (200 km/h) and a maximum range of approximately 1,350 miles (2,170 km) between each refuelling. Their route availability is very good being RA 2 - in part due to the lightweight bogie design.
All Voyagers are maintained at the dedicated Central Rivers TMD near Burton-on-Trent.
Read more about this topic: British Rail Class 220
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