Design
The class is a development of the design used in the British Rail Class 165, 166 and 168 DMUs known as the Networker Turbos which were built by BREL and later ABB Transportation Ltd before that company became part of Bombardier.
Notable features shared are the aluminium alloy frame and Voith transmission as well as the general body shape (the cab ends are similar to those of the Class 168, but not Class 165/166), interior design and door fittings. The final drive is sourced from ZF instead of Gmeinder and the diesel-engine supplier changed to MTU.
The engine and transmission are under the body; one bogie per coach is powered, the other unpowered. All coaches in the set are powered (there are no unpowered trailers). The units can work in multiple with trains in the 15X series, i.e. Sprinters, and with other units of the same class. They are unable to operate in multiple with units in the 16X series due to different wiring arrangements.
Seating arrangements are of both 2+1 (first class) and 2+2 (standard class) formation, and give a seated passenger capacity of between ~100 and ~200 per three-car set (depending on the specifications of the operator). 2-car sets are also operated.
Read more about this topic: British Rail Class 170
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