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8 The 737-400,relative to the 737-300,has body stretch of 120 inches ,two
additional overwing exit, tail skid, and strengthened landing gear.
9 The 737-500 uses the 737-300 basic structure with a 94 inches shorter body and
a revised forward and aft fairing (wing to body).
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EXERCISE
A. Find out the explanations of the following words in your “English-chinese
technical dictionary”
1. monocoque
2. landing gear
3. strut
4. antenna
5. fiberglass
6. honeycomb
7. fairing
8. pressure
9. bulkhead
10. APU
11. horizontal stabilizer
12. dorsal fin
13. keel beam
14. station
15. buttock line
16. waterline
B. Read the text loudly and clearly.
[ P1-102 ]
[ P1-89 ]
[ P1-146 ]
[ P1-11 ]
[ P1-58 ]
[ P1-77 ]
[ P1-56 ]
[ P1-117 ]
[ P1-23 ]
[ P1-15 ]
[ P1-77 ]
[ P1-47 ]
[P1-87 ]
[P1-114 ]
[P1-24 ]
[P1-169 ]
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LESSON 2
THE PNEUMATICS SYSTEM
VOCABULARY
1. purpose  p:ps  n..目的,用途
2. pneumatic  nju: mætik  a. 氣動的, n. 壓縮空氣
3. compressed air  kmpresd    壓縮空氣
4. environment  invairnment  n. 環境,場合
5. phase  feiz  n.相(位),階段
6. obtain  btein  u. 得到,達到
7. engine bleed  end in   bli:d  n. 發動機引氣
8. external  ekst:nl  a. 外部的
9. cart  ka:t  n. 車
10. connector  knekt  n.連接器,接頭
11. cowl  kaul  n. 整流罩
12. thermal  :ml  a. 熱的
13. anti-icing  æntiaisi  防冰
14. also   :lsu  adj. 也,此外,還……
15. provide  prvaid  v. 提供
16. potable water  putbl  w :t  飲用水
17. hydraulic  haidr lik  a. 液壓的
18. starter  sta:t  n. 啟動器, 起動裝置
19. within  wiðin  prep. 在……之內,不超出……
20. normal  n :ml  a. 正常的
21. substitute  sbstitju:t  v. 取代, 以……代替
22. meet  mi:t  v. 滿足,適(符)合
23. need  ni:d  n. 需要,要求
24. top  t p  n. 上部(邊),頂部
25. figure  fig  n. 圖形
26. isolation  aislein  n. 隔離,絕緣
27. valve  vælv  n. 閥,活門
28. duct  dkt  n. 管道,通絡
29. join  d in  v. ; n. 結合,連接,參加
30. crossover  kr suv  n. 跨接,交叉
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31. govern  gvn  v. 管理, 控制; 調整
32. appropriate  pruprieit  a. 適當的,相當的
TEXT
1 The purpose of the pneumatic system is to supply compressed air for a
controlled temperature and pressure environment during all phases of light and
ground operation. Air is obtained from engine bleeds, APU, or from an external
ground cart through a connector located on the fuselage.
2 The pneumatic system controls the temperature and the pressure of engine
bleed air source. The pneumatic system provides high temperature, high pressure
air for the air conditioning, pressurization, wing and cowl thermal anti-icing.
Also, the pneumatic system provides pressure for the potable water system,
hydaulic system and engine starters. The engine bleed air systems are located on
the engine and within the support strut.
Fig2-1 pneumatics system
3 The normal cabin air source is obtained from the 5th-stage of the engines .At
low-engine power, 9th-stage air automatically substitutes to meet user system
needs.
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4 On the top of figure 2-1,the isolation valve separates the left and right halves
of the system .On the left side of the isolation valve, the APU bleed air duct joins
the left side crossover duct; On the righr side, the pneumatic ground service
connector joins the right side crossover duct. From these ducts the user system
are supplied with pressurized air ,governed by the appropriate control valves.
　
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