The keel for sailing vessel

For sailing vessels the keel meets two additional functions:

First It serves to increase the Lateralplans which reduces the lateral drift of the vehicle. This allows for sailing vessels to sail to the wind (at an angle to move forward against the wind).

Second It provides weight stability, which protects the vehicle from capsizing (fall) in high heel (lean).

Keel designs

Keel beam

Sailing vessels, small vessels and tugs have a bar keel, which protects the skin from touching the ground and increases the rate stability. A stretching down to the stern keel (keel case) reduces the drift.

Ballast keel

Ballast keels are severe, consisting of cast iron or lead keel fins that provide stability when sailing for weight. Ballast keels make up about one-third to one half of the total weight of boat.

Ballast sword

The company "Gade boats" used for the products of their Jollenkreuzer since the 1960s with a sword einlaminerten lead ballast. These swords make a transition to the Hubkielen.

Flat keel

Most ships have a steel, inserted into the outer shell, flat keel, the thickness of the adjacent floor panels outperforms.

Fin keel

As the fin keel is called a heavy keel fin (see also the ballast keel), which is angebolzt on sailing boats (keelboats or yachts), usually on the "actual" keel. It differs from these boats between short-and long-Kiel band. Older types of yachts are often long keel, modern yachts almost invariably short-Kiel.

Wing keel

The wing keel for the first time in 1983 in the America's Cup at the yacht "Australia II", which also won the race used. The wing itself is a special form of the keel bulb and may bring hydrodynamic advantages. These benefits occur mainly at higher boat speeds. On slow boat speeds (low wind) affects the winged keel - because of the relative to conventional keel larger wetted surface, which causes a greater water resistance - rather than brake. Because of the low draft with wing keel yachts can also be operated in shallow waters.

Hubkiel

Under Hubkielen means keel fins, which can be moved inside the vessel by means of suitable lifting equipment such as winches. Hubkiele be used primarily where keel boats must often be transported, such as to allow eg racing boats, or vessels with deep draft tarnishing shallow harbors.

An alternative is to Hubkielen swing keels.

Keel

A keel is the combination of a fin keel with a sword aufholbaren. The fin keel member is downwardly shorter (stub keel) than in normal fin keel. He largely ensured the stability of the body weight. The sword can be extended through a slot in the keel, thereby extending the lateral plane. This construction has the advantage that can be sailed with raised sword in shallow water.

Kimmkiel

A Kimmkiel consists of two short fin keels which are used on both sides of the hull (in the horizon). They allow in waters with strong tidal problems, the drying up because the boat can easily stand on the Kimmkiel. Through optimal positioning and specific profiles of the keel fin, is generated such as the Fighter in the wind forward or half wind course, a hydrodynamic lift to windward.

There is also the version with an additional keel in the middle of the ship, giving a total of three short fin keels.

Kippkiel, canting keel, canting-keel

Kippkiele (also swing keels and canting keels) are movable keel carrying bombs, long and narrow tail fins, which are used mostly for Ragattasegelyachten. They can be pivoted laterally (towards starboard or port side in the direction) in order to influence the heeling of the yacht active. Kippkiele permit, in relation to similar yachts with fixed keel, reducing the overall weight.

Short keel

The short keel, the keel on sailboats in use today. One advantage over the long keel is that short keel yachts with agile and are thus easier to maneuver. Disadvantages are that yachts are less directionally stable with short keel and have a greater depth.

Long keel

Long keels extending over a large area of ​​the underwater hull of a sailing yacht. Today they are built any more, because they offer more benefits short keels.

Hull with bilge keel

Bilge keels on both sides of boat or ship-mounted rails or ridges that serve to reduce yaw and roll movements. They are usually found on cargo ships or motor boats.

Schwenkkiel

Swing keels are movable tail fins, which can be pivoted fore and aft or athwartships. The latter are also suspended or Kippkiel.