A tackle attaching the fore end of the boom to the heel of the mast, to prevent the boom rising. Sometimes used as a vang, it facilitates bending the boom to control the flatness of the sail, particularly when the sheets are eased.
Related Terms |
ADJUSTABLE DIFFERENTIAL
A means of changing the difference between the control cut-in and cut-out points.
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ACTION
Refers to the action of a controller. It defines what is done to regulate the final control element to effect control.
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SHED MODE
A method of demand control that reduces kW demand through shedding and restoring loads.
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CATALYST
A substance which speeds a chemical action without undergoing a chemical change itself during the process. Now used in catalytic converters to control amount of unburned hydrocarbons and CO in automobile exhaust.
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AUTOMATIC FROST CONTROL
Control which automatically cycles refrigerating system to remove frost formation on evaporator.
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CATALYTIC CONVERTER
An integral part of vehicle emission control systems since 1975. Oxidizing converters remove hydrocarbons and carbon monoxide (CO) from exhaust gases, while reducing converters control nitrogen oxide (NOx) emissions. Both use noble metal (platinum, palladium or rhodium) catalysts that can be 'poisoned' by lead compounds in the fuel or lubricant.
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AUTOMATION
The employment of devices, which automatically control one or more functions.
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CHIP CONTROL FILTER
A filter intended to prevent only large particles from entering a component immediately downstream. Also known as Grit control filter, Last-chance filter
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GYROPILOT
An automatic device for steering a vessel by means of control signals received from a gyrocompass. Also called AUTOPILOT
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PARTICLE DENSITY
An important parameter in establishing an entrained particle's potential to impinge on control surfaces and cause erosion.
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