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B unit
Sign in to saveAlso known as Booster unit, B-unit
thumb|BNSF GP60B #346, a rare example of a B-unit of a hood-styled locomotive still in service as of 2016 thumb|B-unit of the Russian TE10|3TE10MK diesel locomotive with a cab-styled body thumb|Russian industrial electro-diesel locomotive for quarry railways with primary electric locomotive and two diesel-electric B units
~15 min read
Article
15 sectionsContents
- Controls
- Reasons for use
- The B-unit era
- Conversions
- Unusual consists
- List of B-unit locomotive models
- United States
- USSR, Russia, Ukraine and other post-Soviet countries
- Australia
- Italy
- United Kingdom
- Sweden
- Belgium
- China
- References
thumb|BNSF GP60B #346, a rare example of a B-unit of a hood-styled locomotive still in service as of 2016 thumb|B-unit of the Russian TE10|3TE10MK diesel locomotive with a cab-styled body thumb|Russian industrial electro-diesel locomotive for quarry railways with primary electric locomotive and two diesel-electric B units
A B-unit, in railroad terminology, is a locomotive unit (generally a diesel locomotive) which does not have a control cab or crew compartment and therefore must be operated in tandem with another coupled locomotive with a cab (an A-unit). The terms booster unit and cabless are also used. The concept is largely confined to North America and post-Soviet countries. Elsewhere, locomotives without driving cabs are rare.