On London Underground tube trains, what is the difference between a driving motor and a non driving motor?

Question

On London Underground tube trains, what is the difference between a driving motor and a non driving motor?

In: Technology

Answer 1

A driving motor (DM), also called a motor car, has a cab for the train’s operator and is equipped with brakes and other controls. A non-driving motor (NDM), also called a trailer car, has no cab and no controls, but still has the same traction motors as a DM to provide for acceleration. Stock DMs have 42 passenger seats and are most often found at the front and rear of a train. Stock NDMs have 40 seats.