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system. Clacker 2 receives an input from the CAPT mach airspeed
warning system. The BELL receives an input from the fire warning
system. The input causes a multivibrator circuit to ring the bell at a rate
of 60 times per second.
Questions to Lesson 45:
1. When will the aural warning system provide audio signals to alert the
flight crew ?
2. If SELCAL is not installed, why is flight crew required to monitor the
heavy communication traffic ?
3. For SELCAL operation, what is assigned to each airplane ? what
does each letter correspond to ?
4. How does the ground station call an individual airplane ?
5. What does the aural warning system consist of ?
6. Why does the monitor circuits interface with the airplane systems ?
7. What does the aural warning devices unit contain ?
8. How many systems does the aural warning system interface with ?
9. How many aural warning devices are in the aural warning devices
unit ? What are they ?
10. Does module A1 contain the chime, wailer, intermittent horn, and
steady horn circuitry ?
11. With the aid of figure 45-3 , where does the HI chime circuit receive
an input from ? Where is the output of the HI chime circuitry sent to ?
12. According to figure 45-3, where does the HI-LO chime circuitry
receive an input from ? How many seconds does LO chime lag HI
when they reach the speaker ?
13. Where does the steady horn circuit receive an input from?
14. With the help of figure 45-3, where is the output of the horn
oscillator sent to before being applied to the speaker ?
15. Where does the intermittent horn circuit receive input from?
16. Who receives an input from the DFCS ? Is this input sent to the horn
oscillator and a modulator circuit at the same time ?
17. Where does clacker 1 and clacker 2 receive input from ?
EXERCISE
A. Translate Paragraph 1, 2, 5, 6, 7 and 8 of Lesson 45 into Chinese.
B. Explain the following abbreviations and acronyms.
1. SELCAL
2. ELEX
3. HI
4. LO
5. F/O
6. PWR
7. BAT
8. OSC
9. REG
10. SEC
C. Answer the questions to Lesson 45.
ESSENTIAL（基礎） ENGLISH OF
AERONAUTICAL ENGINEERING
航空工程英語基礎
LESSON 1 THE B737 FUSELAGE 機體
一、生詞
飛機Airplane 半硬殼式Semi-monocoque 機身Fuselage
起落架Landing gear 動力裝置Power plant 支柱Strut
分為Divide into 包括Contain 天線Antenna
玻璃纖維Fiberglass 蜂窩狀物Honeycomb 整流罩Fairing
鉸鏈Hinge 壓力密封隔
板
Bulkhead 駕駛艙flight
compartment
進口Entry 機上廚房Galley 登機梯Airstair
電子設備艙Electronic
equipment bay
檢修口Access door 旅客艙Passenger
cabin
貨艙Cargo 逃逸Escape 艙口Hatch
空間Space 燃油箱Fule bank 終止Terminate
輔助動力裝置Auxiliary power
unit
水平安定面Horizontal
stabilizer
桁架Truss
排出Exhaust 設計Design 和…一樣The same as
伸長stretch 延伸Extension 脊鰭Dorsal fin
增強Strengthen 相對于Relaviate to 滑軌Skid
結構structure 修改revise
二、TEXT
(1) the B737 is a low wing airplane. B737 has semi-monocoque fuselage and
fully retractable landing gear. Two power plants are located under the
wings on short struts.
波音737 是一種下單翼飛機。它擁有半硬殼式機身和全收式起落架。
兩臺發動機位于機翼下方短支架上。
(2) The 737-300 fuselage is divided into four sections: section 41 , section
43 , section 46 and section 48 .
波音737 機體為為四部分：41、43、46 和48.
(3) Section 41 contains the radar antenna behind a fiberglass honeycomb
fairing, hinged at the top. aft of the pressure bulkhead, above the floor, are
the flight compartment and forward airstair and its door, and the electronic
equipment bay .this section has two lower access doors.
41 部分包括鉸接在蜂窩狀玻璃纖維雷達罩后面頂部的雷達天線、壓力
隔板后方及地板上方區域是駕駛艙和前登機梯及其門，還有電子設備
艙。這部分有兩個下檢修口。
(4) Section 43 contains the passenger cabin and the forward cargo
compartment.
43 部分包括客艙和前貨艙。
(5) Section 46 contain the center and aft portion of the passenger cabin ,two
overwing escape hatches and aft entry and service doors. The space below
the floor includes the wing center section (fule tank), air-conditioning
bays, wheel well, hydraulic bay and aft cargo compartment. this section
terminates at the aft pressure bulkhead.
46 部分包括客艙中后部，兩個逃生艙及入口和服務門。地板下的空間
包括中央油箱、空調艙、輪艙、液壓艙和后貨艙。這部分終止于后壓
力隔板。
(6) Section 48 contains the auxiliary power unit(APU) and horizontal
stabilizer truss. Access to this section is through a door on the left side. Aft
of which is the APU access door and APU exhaust.
　
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