The turntable, from Petosky, Michigan, enables a locomotive to be turned in a circle so that
it can run in the opposite direction. Such turntables were usually located outside a
"roundhouse" used for housing and repairing locomotives. On arrival, a locomotive was
detached from its train, turned to its desired direction and headed either for a new destination
or to the roundhouse for repair. Turntables are balanced so precisely that only two people are
needed to turn the biggest and heaviest locomotives.
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