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fly block

noun, Machinery, Nautical.
(in a Spanish burton or the like) a block, supported by a runner, through which the hauling part of the fall is rove.
any block that shifts with the movement of its tackle.
Origin of fly block
1835-45 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for fly-block
Historical Examples
  • The block secured to the lower end of the tye is the fly-block.

    The Sailor's Word-Book William Henry Smyth
  • Luck is like a fly-block and its yard: when one goes up, the other comes down.

    The Red Rover James Fenimore Cooper
  • Have the fly-block of the topsail halyards above the top, and rack the runner to the topmast backstay or after shroud.

    The Seaman's Friend Richard Henry Dana
  • Then make fast your hook to the bight of the rope, and reeve the other end through the fly-block for a fall.

    The Seaman's Friend Richard Henry Dana
  • Reeve the end of your rope through the upper block, and make it fast to the strap of the fly-block.

    The Seaman's Friend Richard Henry Dana
  • The halyards should be a luff purchase, the fly-block being the double block, and the single block being hooked in the channels.

    The Seaman's Friend Richard Henry Dana

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