fin keel
Noun: A fin keel is a fixed, vertical, fin-like structure projecting downward from the hull of a sailboat. It is typically made of metal (like lead or iron) and is attached to the boat's keel. Its primary function is to provide lateral resistance against the force of the wind on the sails, preventing the boat from sliding sideways (making leeway) and improving its ability to sail upwind. It also houses ballast to increase the boat's stability.
The term "fin keel" is used specifically in the context of sailing and yacht design to describe a common type of underwater hull appendage. * Modern cruising sailboats often feature a fin keel for good upwind performance. * The designer chose a deep fin keel to maximize stability for the ocean race. * Compared to a full keel, a fin keel generally allows for better maneuverability.
- Fin keel with bulb: A common variation where the bottom of the fin keel has a teardrop-shaped mass (the bulb) to concentrate weight lower, further enhancing stability.
- The performance of a fin keel is often discussed in contrast to other keel types, such as "full keels," "winged keels," or "bilge keels."
- Keel (noun): The central structural base or backbone of a ship or boat, running along the bottom from bow to stern. A fin keel is one type of keel.
- Centerboard (noun): A retractable fin used on smaller boats for lateral resistance, unlike a fixed fin keel.
- Daggerboard (noun): Similar to a centerboard but lifted vertically rather than pivoting.
- Bilge keel (noun): A pair of fixed fins on either side of the hull, allowing the boat to sit upright on tidal mud.
- Underwater fin
- Sailboat keel (in a specific context)
- Keel design: The engineering and shape of the keel, which includes fin keels as a category.
- Lateral resistance: The force countering sideways drift, which a fin keel provides.
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a metal plate projecting from the keel of a shallow vessel to give it greater lateral stability
