It is a high-powered, light-weight vehicle with high acceleration for short- and medium-distance services with frequent stops. The
aluminium superstructure was built as flat as possible, both to minimize drag and to ease automated cleaning. The acceleration is achieved by distributing
traction motors among eight of the train's ten axles. The Class 425 are similar to
Deutsche Bahn's
Class 424 and
Class 423 trainsets. A Class 425 unit consists of four cars that share three
jacobs bogies and can only be separated at maintenance facilities. The inner two cars are designated as
Class 435. A 425 unit typically consists of the following cars, where
x is the unit's number: • 425 x • 435 x • 435 (x+500) • 425 (x+500) e.g. 425 153 + 435 153 + 435 653 + 425 653. Different consists usually occur when the remains of partially destroyed units are combined to form one intact EMU. ==See also==