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A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, airship, or other vehicle that moves through a fluid medium (usually air or water). On an airplane, the rudder is used primarily to counter adverse yaw and p-factor and is not the primary control used to turn
1. A position half way along the length of a ship or boat. [13] 2. A position half way between the port and starboard sides of a ship or boat, as in "helm amidships", when the rudder is in line with the keel. [13] ammunition ship A naval auxiliary ship specifically configured to carry ammunition, usually for combatant ships and aircraft.
In mythology the rudder, which the goddess can steer, represents control of the changeable fortunes of life. Plato used the metaphor of turning the Ship of State with a rudder. In the Biblical book of James, the author compares the tongue with a ship's rudder which, though physically small, makes great boasts.
A rudder command dictates changing the angle of the rudder, which is a single-event action, whereas steering a heading is a comparatively long event and will require ongoing or continuous rudder adjustments. The following are helm orders used in the United States Navy and United States Coast Guard: [2] Rudder. Midships (Bring rudder angle to 0 ...
Also ship's magazine. The ammunition storage area aboard a warship. magnetic bearing An absolute bearing using magnetic north. magnetic north The direction towards the North Magnetic Pole. Varies slowly over time. maiden voyage The first voyage of a ship in its intended role, i.e. excluding trial trips. Maierform bow A V-shaped bow introduced in the late 1920s which allowed a ship to maintain ...
2.5 to 7 millimetres (0.1 to 0.3 in) lettering guides for technical drawings Lettering pens for lettering guide template. A lettering guide template is a special type of template used to write uniform characters. It consists of a sheet of plastic or other material with cut-outs of letters, numbers, and other shapes used especially for creating ...
The Schilling profile is designed to improve the effective lift generated by the rudder and hence improve the maneuverability of the craft, especially at slow speeds. The rudder is effective in both forward and reverse. It has been claimed that a Schilling rudder "combines the highest lateral forces with the best course stability. [2]
The flap rudder is designed to improve the effective lift generated by the rudder and hence improve the manoeuvrability of the craft. The rudder consists of two or more sections which move relative to each other as helm is applied and the angle of the main or driven section moves, thus the shape of the rudder changes dynamically as the angle of helm is changed.