举一反三
- The primary flight control system uses conventional control wheel, column and pedals linked mechanically to hydraulic power control units which command the primary flight control surfaces, ailerons, elevators, and _________.
- 1) What are primary flight control surfaces and what are the secondary control surfaces? (5分） 2) What are their postions? 3) What are their functions?
- 词汇与结构 The aircraft take advantage of aerodynamic _________ to travel through the air by means of primary and secondary flight control surfaces which are operated by flight controls in the cockpit.
- 词汇与结构 The roll control surfaces consist of hydraulically powered ailerons and flight spoilers which are controlled by _________ either control wheel.
- 词汇与结构 The complexity and weight of mechanical flight control systems increase considerably with the size and performance of the aircraft. Hydraulic power _________ these limitations.
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浏览器不支持音频Why is aircraft engine control also called flight control? A: Because it connects the control transmissions B: Because it can control the speed. C: Because it contains all the basic flight systems.
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In hydraulic transmission, the hydraulic control valve used to control the pressure, flow and direction of liquid is ( ). A: Power plant B: control unit C: auxiliary device D: Actuator
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Which of the following is NOT thought to be the power of the national government in the federal government system? A: control of federal money B: control of interstate commerce C: control of national defense D: control of state criminal and civil laws
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Fuel injection uses the jet pump system and a Woodward type hydraulic （） is used to control engine speed.
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Closed-loop control system is an automatic control system. Open-loop control system is not an automatic control system.