Bo-Bo

plural Bo-Bos · alternative B-B

1. rail transportA wheel arrangement for diesel and electric locomotives signifying that a locomotive has four axles, each powered by a motor, on two bogies.

   1 more example

   The Lötschberg had always been in the forefront of electric locomotive development and their 4,000 h.p. Bo-Bo design, introduced in 1944, was the first of its particular type in Europe, if not in the world. Shortly afterwards in 1946, the very successful Swiss Federal Bo-Bo type was introduced and for many years undertook the working of the high speed lightweight trains over the Geneva-Zurich, Geneva-Basle and other main lines.

   1961 March, “Talking of trains”, in Trains Illustrated, page 136