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Rudder quadrant
| Морской словарь |
A frame fixed to the head of a ship’s rudder shank, to which the steering mechanism is attached.
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Quadrant, английский
- Квадрант
- Cuadrante
- One of four sectors of the body thought of as being divided by the sagittal plane and the intertubercular plane tenderness in the right lower quadrant
- A reflecting instrument used to take the altitude above the horizon of the sun, moon, or stars at sea, and thereby to determine the latitude and longitude of the place, &c. &c. it was invented by hadley. also, in speaking of double stars, or of two objects near each other, the position of one component in reference to the other is indicated by the terms, north following, north preceding, south following, or south preceding, the word quadrant being understood.—a gunner`s quadrant, for determining the gun`s angle of elevation. the long arm is inserted into the bore, while the short one remains outside, with a graduated arc and plummet, showing the inclination. for depression, on the contrary, the long arm must be applied to the face of the piece. also, a graduated arc on the carriage showing, by an index on the trunnion, the gun`s elevation above the plane of its platform; first applied by the gallant captain broke.—the mural quadrant, was framed and fitted with telescope, divisions, and plumb-line, firmly attached to the side of a wall built in the plane of the meridian; only used in large observatories.—senical quadrant, consists of several concentric quadratic arcs, divided into eight equal parts by radii, with parallel right lines crossing each other at right angles. it was made of brass, or wood, with lines drawn from each side intersecting one another, and an index divided by sines also, with 90° on the limb, and two sights on the edge, to take the altitude of the sun. sometimes, instead of sines, they were divided into equal parts. it was in great use among the french navigators, from its solving the problems of plane sailing.
- A former navigational instrument, con- punt 252 sisting of a flat piece of metal cut like a quarter-circle, with a 90° angle at the top and a curved side marked with a scale of degrees at the bottom. a weighted thread hung from the top. the navigator lined up one straight edge with the sun or a star and noted where the thread crossed the scale. since a celestial body is directly overhead (90°) at the pole and lies on the horizon (0°) at the equator, the angle indicated the ship’s latitude.
- Квадрант; четверть круга
- One-fourth part of the perimeter of the face of a bit crown; the quarter of a circle; an arc of 90°. quadruple a. see aaaa.
Quadrant analysis, английский
A way of presenting information to highlight and explain trends.
Quadrant arch ring, английский
A quarter-circle brace that carries thrusts from a vault to external buttresses.
Quadrant cutter, английский
Quadrant molding, английский
A convex molding, the profile of which is one-quarter of a circle. also called a quad molding.
Quadrant search, английский
Quadrantal bearing, английский
Quadrantal deviation, английский
Deflection of a magnetic compass due to the induced magnetism of a ship’s hull.
Quadrantal spheres, английский
Hollow balls of soft iron placed on either side of a magnetic compass in order to compensate for quadrantal deviation by neutralizing induced magnetism. sometimes known colloquially as navigator’s balls (cf. flinders bars).
Quadrantanopia, английский
Blindness in a quarter of the field of vision
Rudder, английский
- A vertical plate or board for steering a boat.
- Руль `направления
- A steering device which can be placed aft, externally relative to the keel or compounded into the keel either independently or as part of the bulb/centerboard.
- Руль
- Перо руля
- A vertical blade attached to the bottom of the hull which is used to steer the boat.
- Руль, перо руля
- The appendage attached by pintles and braces to the stern-post of a vessel, by which its course through the water is governed. it is formed of several pieces of timber, of which the main one is generally of oak, extending the whole length. tiphys is said to have been its inventor. the anglo-saxon name was steor-roper.
- A vertical underwater plate or blade with a long shank, forming part of the steering mechanism of a boat or ship. it is usually fastened outside the hull at or near the stern, hinged at its forward edge to the rudder post. the device operates on the principle of unequal pressures, forcing the stern to turn or yaw in one direction by diverting the flow of water in the opposite direction. research in the early 1980s showed it feasible to use rudder(s) for roll damping, while simultaneously controlling the ship’s heading. the voith-schneider drive eliminates the need for a rudder by combining propulsion and steering systems. (from the anglo-saxon roth or = turning oar.)
- On an aeroplane, the rudder is a control surface usually on the trailing edge of the vertical stabilizer or fin. the rudder is used to control yaw.
- Avertical plate for steering a boat.
Rudder, английский
Underwater part of a boat used for steering.
Rudder, английский
The movable part of a vertical airfoil which controls the yaw of an aircraft; the fixed part being the fin.
Rudder, английский
Rudder angle receiving eelsyn, английский
Rudder bands or braces, английский
The iron or composition hinges on which a rudder turns.
Rudder blade, английский
Перо руля
Rudder chains, английский
Copper chains, formerly attached to the after side of the rudder at one end and to the stern at the other, with enough slack to allow free movement of the rudder. they served to save the rudder if it was unshipped by striking a reef or shoal.
Rudder pedal, английский
Rudder pedals adjustment, английский
Регулировка педалей путевого управления
Rudder position recorder, английский
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Ruin your day, английский
This commonly-used phrase probably originated with 5th century bce. greek historian thucydides who wrote “a collision at sea can ruin your entire day.”
Rudder post, английский
- The element of the stern frame on which the rudder is hung. see also sternpost.
- The post that the rudder is attached to. the wheel or tiller is connected to the rudder post.
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