In a jib head rig, the forestay does not attach to the masthead, but at a point lower on the mast where the top of the jib meets the mast.
Related Terms |
CROWN
The top of the piston in an internal combustion engine above the fire ring, exposed to direct flame impingement.
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HEADLAND
A comparatively high promontory having a steep face. Usually called HEAD when coupled with a specific name. Also called FORELAND.
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OIL RING
A loose ring, the inner surface of which rides a shaft or journal and dips into a reservoir of lubricant from which it carries the lubricant to the top of a bearing by its rotation with the shaft.
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CLEARANCE SPACE
Space between top of piston and the valve plate.
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DYNAMIC SUCTION HEAD
Positive static suction head minus friction head and minus velocity head.
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SUCTION LIFT
The combination of static suction lift and friction head in the suction piping when the source of liquid is below the pump centerline.
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HEAD
The measure of the pressure expressed in feet of height of water: 1 psi = 2.31 feet of water.
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UP FLOW
The operation of an ion-exchange unit in which solutions are passed in at the bottom and out at the top of the container.
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HEADSTICK
The spar laced to the head of the topsail.
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BIT HEAD
The top of two massive timbers that support the windlass on a sailing barge.
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