The tendency of a sailboat to turn to windward in a strong wind when there is no change in the rudder's position. This is the opposite of lee helm and is the result of a dynamically unbalanced condition.

Related Terms

COPPER STRIP CORROSION

A qualitative measure of the tendency of a petroleum product to corrode pure copper.

TO HAUL

To change the course of a sailing vessel to bring the wind farther forward, usually used with up, such as haul up.

HEAD WIND

Wind from ahead of the vessel

CAPILLARITY

A property of a solid-liquid system manifested by the tendency of the liquid in contact with the solid to rise above or fall below the level of the surrounding liquid; this phenomenon is seen in a small bore (capillary) tube.

HARMATTAN

The dry, dusty trade wind blowing off the Sahara Desert across the Gulf of Guinea and the Cape Verde Islands. Sometimes called the DOCTOR, because of its supposed healthful properties.

GUST

1. A sudden brief increase in the speed of the wind of more transient character than a squall, and followed by a lull or slackening of the wind. 2. The violet wind or squall that accompanies a thunder- storm.

CHILL FACTOR

Calculated number based on temperature and wind velocity.

OBLITERATION

A synergistic phenomenon of both particle silting and polar adhesion. When water and silt particles co-exist in a fluid containing long-chain molecules, the tendency for valves to undergo obliteration increases.

TRUNNION BEARING

A bearing used as a pivot to swivel or turn an assembly.

VISCOSITY MODIFIER

Lubricant additive, usually a high molecular weight polymer, that reduces the tendency of an oil's viscosity to change with temperature.

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