London Underground departmental stock

what is it?

Departmental locomotives on the London Underground consist of vehicles of a number of types which are used for engineering purposes. These include battery locomotives, diesel locomotives, electric locomotives, sleet locomotives, pilot motor cars and ballast motor cars. Details of the first four types are covered elsewhere.

spec sheet

built

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number built

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kind

Deep-level tube

traction

electric

builders

Unknown builder

top speed

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power

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From the Wikipedia infobox and Wikidata. Blank means the sources don't say.