NEUTRAL SHIFT SENSOR, A sensor used for             中立變換探測(cè)器，

detecting the elevator and stabilizer trim condition. 用于探測(cè)升降舵和安定面配平狀況的傳感器。

NET PERFORMANCE, Aircraft gross performance         凈性能，

degraded by an amount determined by the local          以飛機(jī)總性能減去由當(dāng)?shù)赜嘘P(guān)單位為了使性能計(jì)算

governing agency for conservative calculation       較為保守所定的一個(gè)量后所得的性能。

purposes.

NICKEL-CADMIUM BATTERY, An electrical device for   鎳鎘電瓶，

changing stored chemical energy into direct current. 將儲(chǔ)存的化學(xué)能變?yōu)橹绷麟姷碾娖髟�件。它使用氫氧�?/p>

Uses nickel hydroxide, cadmium hydroxide and       鎳、氫氧化鎘和氫氧化鉀。

potassium hydroxide.

NOBLE, A term used to explain the properties of some 惰性，

elements that are chemically inert or inactive.      用于解釋有些元素不易起化學(xué)作用的特性的名詞。

NOISE ABATEMENT PROCEDURE, A flight path and        降低噪聲程序，

climb profile designed to limit noise in the airport area. 一種為降低機(jī)場(chǎng)地區(qū)噪聲而設(shè)計(jì)的飛行航跡和爬升剖

                                                    面。

NOMEX, Material similar to paper for honeycomb      NOMEX，

construction. (Nomex is a trade name.)               是一種類似紙的材料，用以制作蜂窩結(jié)構(gòu)。（NOMEX

                                                    是商品名）。

NON-RETURN VALVE, A valve allowing flow in only     單向活門，

one direction.                                       只允許向一個(gè)方向流動(dòng)的活門。

                                    TECHNICAL DICTIONARY                                105

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英漢對(duì)照民用航空詞典                                     BOEING

NONDIRECTIONAL BEACON (NDB), A radio beacon           無(wú)方向信標(biāo)（NDB），

which transmits nondirectional signals whereby the pilot 發(fā)射無(wú)方向信號(hào)的無(wú)線電信標(biāo)臺(tái)。據(jù)此飛行員能夠用自

can use the ADF to determine his bearing to or from the 動(dòng)定向儀 （ADF ）確定他的背臺(tái)或向臺(tái)方位。