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115volt ac , 28 volt ac, and 28 volt dc supply to using systems .
2. The alternating current power is supplied by two engine driven generators
for normal inflight operation.
3. A complete generator assembly consists of an exciter generator, a rotating
rectifier and a main generator .
4. The exciter magnetic field is supplied with dc power from the voltage
regulator.
5. The electrical power for the ground operation of all electrical loads on the
airplane is supplied by an external ac system .
LESSON 12
FUEL
VOCABULARY
1. fuel [fjul ] n. v. 燃油(加油)
2. store [ st : ] vt. 存貯
3. deliver [di 'liv ] vt. 運送; 供給; 交付(貨)
4. subdivide [ sbdivaid ] v. 細分
5. storage [st :rid ] n. 貯藏
6. fueling 是動詞fuel 的現(xiàn)在分詞,意為加(供給)燃油
7. tank [ tæk] n. 油箱
8. vent [vent ] n. 通氣裝置vt . 給…開孔;通氣
9. vent surge tank 通氣均(穩(wěn))壓油箱
10. temporary [ 'temprri ] a. 暫時的;臨時的
11. fuel tight [ tait ] 燃油密封的; 不漏燃油的
12. metal-to- metal [ metl ] 金屬和金屬的
13. fit [fit] n. 裝配;配合close fit 緊密配合
14. compound [ 'k mpaund ] n. 劑; 化合物
15. sealing compounds 密封劑
16. fastener [fa:sn ]n. 緊固件
17. joint [d int ] n. 接口; 接點; 接頭
18. rib [rib ] n. 肋wing rib 翼肋
19. baffle [bæfl] n. 緩沖隔板
20. check valve 單向活門; 止回閥
21. boost pumps [ bu:st ] [ pmp ] 增壓泵
22. away from … 離開…
23. fueling station 加油站(口)
24. fill [fil ] v. 填充; 灌; 加注
25. partially [ 'pa:li ] ad. 部分地; 局部地
26. completely [ km pli: tli ] ad. 完全地
27. alternately [ :l t:nitli ] ad. 另一方面
28. port [p :t ] n. 入口; 孔
29. transfer [trænsf: ] v. 轉(zhuǎn)移; 傳送( 輸)
30. float [flut ] n. 浮子
31. overfill [ uv fil ] n. ; v. 過滿
32. prevent M from + ing … 使M 不致…; 防止M 做…
33. defueling [ difjuli ] n. 放油; 從油箱排出燃油
34. utilize [ ju:tilaiz ] vt. 利用; 應(yīng)用
35. pump [pmp ] n. 泵; v. 用泵抽
36. feed [fi:d ] v. 供油
37. respective [ rispektiv ] a. 各自的; 有關(guān)的
38. crossfeed [ kr sfi:d ] n. 交輸; 交叉供油
39. usable [ ju:zbl ] a. 可使用的; 有用的
40. weight [ weit ] n. 重量
41. capacitance [ kpæsitns ] n. 容量; 電容
42. stick [stik ] n. 桿; 棍; 棒
43. chip [tip ] n. 芯片; 集成電路片
44. microcomputer 微型電子計算機
45. LCD = Liquid Crystal Display 液晶顯示
[ likwid ][ kristl ][ displei ]
46. resistive current [ rizistiv ][ krnt] 電阻的電流
47. leakage [ 'li:kid ] n. 泄漏, 放泄
48. unacceptable [ k'septbl ] a. 不能接受的
49. error [er ] n. 錯誤; 誤差
50. code [ kud ] n. 碼; 代碼; v. 編碼
51. graduate [grædjueit ] v. 刻度; 分度
52. tape [ teip ] n. 帶
53. height [ hait ] n. 高度
TEXT
[1] The purpose of the fuel system is to store and deliver fuel to the engine and APU.
The fuel system is subdivided into, storage, fueling, distribution and indicating
systems.
[2] There are 3 tanks for fuel storage and 2 vent surge tanks for temporary fuel
storage. Tank No.1 is located in the left wing, tank No.2 is located in the right wing
and center tank is located in the fuselage under the passenger cabin. The 2 vent
surge tanks are located outboard of the main tanks. All fuel tanks are fuel tight.
Close metal -to - metal fit of all parts forms the basic seal. Sealing compounds and
sealed fasteners are used on all joints to complete the fluid tight seal . Two of the
wing ribs contain a series of baffle check valves to prevent fuel flow away from the
boost pumps.
Fig. 12-1 storage
[3] The fueling system provides a means of filling the fuel tanks on the airplane.
Fueling can be accomplished by the use of a single pressure fueling station through
which all tanks can be filled partially or completely. Alternately, the main tanks
(No.1 and No.2 )can be filled through the overwing ports. The center tank can be
filled by transferring fuel from the main tanks using the fuel station.
[4] The components associated with the fueling system are the fueling station
located under the right wing leading edge outboard of the engine, 3 float switches
－one for each tank, prevent the tanks from being overfilled. The tank fueling float
switches are located near the top of each tank and sense full tank quantity. The
　
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