English

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Noun

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big end (plural big ends)

  1. In a piston engine, the larger end (crankshaft end) of the connecting rod that connects a piston to the crankshaft.
    From the sound of that motor, I'd say yer big end's gone, mate.
    • 1951 July, “British Standard Locomotives”, in Railway Magazine, page 441:
      Except in the case of the largest 4-6-2, not yet in contemplation, use of two [outside] cylinders only was decided on for the following reasons:— [] 2. The split inside big end is a source of trouble at high speeds and powers unless exceptional integrity of maintenance can be guaranteed.

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