時間：2011-03-11 23:18來源：藍天飛行翻譯 作者：航空 點擊：次
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ridge (meteorology). An elongated area of relatively high atmospheric pressure. Ridges are usually associated with, and most clearly identified as, areas of maximum anticyclonic curvature of the wind flow. riffle file. A hand file with its teeth formed on the outside of a curved surface that resembles the bowl of a spoon. rigging (aircraft maintenance). Adjustment of the wings and tail surfaces of an aircraft to give it the proper flight characteristics. rigging pins (aircraft maintenance devices). Special pins installed in holes in an aircraft control system to hold the components in a specified position when the controls are being rigged and the control cable tension adjusted. right angle. An angle of ninety degrees (90°). right-hand rule for electric generators. The rule for determining the direction of current flow in a wire passing through a magnetic field. Hold the right hand with the thumb, first finger, and second finger extended so they are at right angles to each other. When the first finger points in the direction of the lines of magnetic flux (from the north pole to the south pole), and the thumb points in the direction the wire is moving through the field, the second finger will point in the direction of current flow (from positive to negative). This is also known as Fleming’s rule for electric generators. right-hand rule for the direction of magnetic flux. Place the fingers of the right hand around a current-carrying conductor in such a way that the thumb points in the direction of conventional current flow (from positive to negative). The fingers will encircle the wire in the same direction as the lines of flux. This rule is also known as Fleming’s rule for the direction of magnetic flux. right-hand threads. Threads that cause a screw or threaded component to advance, or screw in, when it is turned in a clockwise direction. Most aircraft threaded components have right-hand threads. right triangle. A triangle that contains one right (90°) angle. rigid airship. A form of lighter-than-air flying machine. A rigid airship has a framework of aluminum alloy covered with fabric. The lifting gas is held inside the rigid framework in separate ballonets. The German Zeppelins of World War I, the British R-100 and R-101, as well as the U.S. Navy’s Los Angeles, Shenandoah, Akron and Macon and the German Graf Zeppelin and Hindenburg, are examples of rigid airships. rigid conduit. Aluminum alloy tubing used to house electrical wires in areas where they are subject to mechanical damage. rigidity in space. The characteristic of a gyroscope that prevents its axis of rotation tilting as the earth rotates. This characteristic is used for attitude gyro instruments. rigid rotor (helicopter rotor). A helicopter rotor attached in its hub so its only freedom of movement is that of changing the blade pitch angle. The blades of a rigid rotor have no hinges that allow them to flap or drag. rigid tubing (fluid power systems component). Thin-wall tubing made of stainless steel, aluminum alloy, or copper, used in aircraft plumbing. Rigid tubing can be used to join components only where there is no relative movement. If there is relative movement, flexible hose must be used. |
