時(shí)間：2011-03-11 23:13來源：藍(lán)天飛行翻譯 作者：admin 點(diǎn)擊：次
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mare’s tail (meteorology). A cirrus cloud with a curve on one end and a long flowing tail on the other. marine grommet (aircraft fabric covering component). A small plastic or metal reinforcing ring attached to the fabric covering at low points in the structure and at the trailing edges of the wing and tail surfaces. Grommets are used to reinforce the drain or vent holes cut in the fabric at these locations. A marine grommet, also called a seaplane grommet, differs from ordinary grommets because of a shield placed over the hole. This shield keeps the spray during takeoff and landing from getting into the structure. marker beacon (radio navigation equipment). A low-powered, 75-MHz, fixed-frequency radio transmitter that directs its signal vertically upward in a small, fan-shaped pattern. Marker beacons are located along the flight path used when approaching an airport for landing, and are identified by their modulation frequency and keying code. When received by compatible airborne equipment, marker beacons indicate to the pilot, both aurally and visually, when the aircraft is directly over the facility. When the aircraft is directly above the outer marker the pilot hears a series of 400-hertz dashes and the blue light illuminates in the series of dashes. Over the middle marker, the amber light illuminates in a series of alternate dots and dashes and the aural tone is a series of 1,300-hertz dots and dashes. The inner marker is identified by the white light illuminating in a series of dots and a series of 3,000-hertz dots is heard by the pilot. married needles (helicopter operation). The needles (pointers) of a dual tachometer indicator installed in a helicopter are said to “married” when one needle is exactly on top of the other. masking tape. Paper tape with a pressure-sensitive adhesive on one side. Masking tape has a wrinkled texture so it will lie smoothly around a curve, and the adhesive is easily removed from a properly prepared surface. Masking tape is used to fasten paper to parts of a surface being painted, to prevent the paint from reaching certain areas. |
