A B-unit, in railroad terminology, is a locomotive unit which does not have a control cab or crew compartment and therefore must be operated in tandem with another coupled locomotive with a cab. The t
BNSF GP60B #346, a rare example of a B-unit of a hood-styled locomotive still in service as of 2016
B-unit of the Russian 3TE10MK diesel locomotive with a cab-styled body
Russian OPE1A [ru; uk] industrial electro-diesel locomotive for quarry railways with primary electric locomotive and two diesel-electric B units
B-unit converted from an EMD F9AM locomotive. The cabin shape was preserved, but its windows were blanked out and the front door was added.
The EMC EA/EB is an early passenger train-hauling diesel locomotive built from May 16, 1937, to 1938 by Electro-Motive Corporation of La Grange, Illinois for the Baltimore and Ohio Railroad. They were
B&O EA 51 on the Capitol Limited sitting next to the Tom Thumb locomotive replica, in 1937.
Baltimore and Ohio 51 at the Baltimore and Ohio Railroad Museum.