The data that needs to be inserted into an Inertial Reference System in order to enable the system to make a successful alignment of navigation is ?
Teaching > aircraft
Which of the following statements concerning the loss of alignment by an Inertial Reference System IRS in flight is correct ?
Mode 'Localizer ARM' active on Flight Director means ?
A closed loop control system in which a small power input controls a much larger power output in a strictly proportionate manner known as A servomechanism, an amplifier, a feedback control circuit, an autopilot. a servomechanism a type of control system in which a small signal or a small force used to control a much larger force in which output accurately follows input even if it varying rapidly. the system constantly compares input the output until error signal becomes zero. 
The essential components of a flight director are 1 a computer 2 an automatic pilot 3 an auto throttle 4 command bars the combination regrouping all correct statements , 4,, 2, 2, 4, 2, 3. 
The control law of a transport airplane autopilot control channel may be defined as relationship between Computer input deviation data the output control deflection signals, input output signals at amplifier level respectively control deviation data control deflection signals, crew inputs to computer the detector responses (returned to airplane), computer input deviation data the signals received the servoactuators. The autopilot control laws determine how computer interprets a performance demand in terms of a control response. 
In a transport airplane an autopilot comprises in addition to mode display devices following fundamental elements 1 airflow valve2 sensors3 comparators4 computers5 amplifiers6 servo actuatorsthe combination regrouping all correct statements 2, 3, 4, 5, 6,, 2, 6,, 3, 4, 6, 2, 3, 4, 5. Question Aeroplane: Automatic Flight Control Systems 51 Answer 8
A pilot engages control wheel steering cws of a conventional autopilot and carries out a manoeuvre in roll when control wheel released autopilot will Maintain flight attitude obtained at that moment, roll wings level maintain heading obtained at that moment, maintain track the flight attitude obtained at that moment, restore flight attitude the rate of turn selected on autopilot control display unit. Question Aeroplane: Automatic Flight Control Systems 51 Answer 9
The basic modes of an autopilot consist in Stabilizing aircraft around its centre of gravity, controlling movement of centre of gravity of aircraft, controlling path of aircraft horizontally or vertically, controlling path of aircraft vertically only. the basic function of an autopilot stabilisation (the stabilisation of aircraft around its centre of gravity). basic function achieved the inner loop systems. the advanced function 'guidance' (monitoring movements of centre of gravity in three dimensions of space). outer loop systems offer guidance facilities (altitude hold, heading hold, vnav, lnav). outer loops act from an external position on inner loop 'foo inner loop into manoeuvrig aircraft into achieving its aim. Question Aeroplane: Automatic Flight Control Systems 51 Answer 10
On a modern aircraft flight director modes are displayed on Upper strip of pfd (primary flight display), upper strip of nd (navigation display), upper strip of ecam (electronic centralized a/c management), control panel of flight director only. Question Aeroplane: Automatic Flight Control Systems 51 Answer 11
In order to know in which mode auto throttles are engaged crew will check Pfd (primary flight display), nd (navigation display), tcc (thrust control computer), throttles position. Question Aeroplane: Automatic Flight Control Systems 51 Answer 12
An automatic landing system necessitating that landing be continued manually in case of a system failure during an automatic approach called 'fail ' 'passive', 'safe', 'redundant', 'operationa. Question Aeroplane: Automatic Flight Control Systems 51 Answer 13
When an aircraft operating in vor coupled mode approaches 'cone of confusion' over a vor station roll channel of autopilot Temporarily maintains a heading, damped a trim input signal from lateral trim system, remains always coupled to selected vor radial, temporarily disconnected. Question Aeroplane: Automatic Flight Control Systems 51 Answer 14
The command bars of a flight director are generally represented on an Adi (attitude director indicator), hsi (horizontal situation indicator), rmi (radio magnetic indicator), ils (instrument landing system) Question Aeroplane: Automatic Flight Control Systems 51 Answer 15
After having programmed your flight director you see that indications of your adi attitude director indicator are as represented in diagram n°1 of appended annex on this instrument command bars indicate that you must bank your airplane to left 1043 Increase flight attitude until command bars recentre on symbolic airplane, decrease flight attitude until command bars recentre on symbolic airplane, increase flight attitude until command bars recentre on horizon, decrease flight attitude until command bars recentre on horizon. Question Aeroplane: Automatic Flight Control Systems 51 Answer 16
An autopilot capable of holding at least altitude and heading mode compulsory For ifr or night flights with only one pilot, on multipilot airplanes, vfr ifr flights with only one pilot, on airplanes over 5.7 t. For a private flight, an autopilot not compulsory, but cpl/atpl we are talking about commercial air transportation. ops 1.655 additional equipment single pilot operation under ifr an operator shall not conduct single pilot ifr operations unless aeroplane equipped with an autopilot with at least altitude hold heading mode. Question Aeroplane: Automatic Flight Control Systems 51 Answer 17
Among following functions of an autopilot those related to airplane guidance are 1 pitch attitude holding2 horizontal wing holding3 indicated airspeed or mach number holding4 altitude holding5 vor axis holding6 yaw dampingthe combination regrouping all correct statements 3, 4 5,, 3, 4 5,, 2, 6,, 2, 3 6. the question asking about 'guidance' functions of autopilot. the 'guidance' functions of a autopilot consist in monitoring movements of centre of gravity in three dimensions of space. 'guidance' functions are altitude hold, heading hold, airspeed hold, vnav (vertical navigation), lnav (lateral navigation). pitch attitude holding, horizontal wing holding, yaw damper are parts of 'basic' function of autopilot (the stabilisation of aircraft around its centre of gravity). Question Aeroplane: Automatic Flight Control Systems 51 Answer 18
The ias or mach hold mode provided 1 autopilot pitch channel in climb mode at a constant ias or mach number2 autothrottles in climb mode at a constant ias or mach number3 autopilot pitch channel in altitude or glide path holding mode4 autothrottles in altitude or glide path holding modethe combination regrouping all correct statements , 4,, 3, 2, 3, 2, 4. during climb, when ias or mach hold speed mode engaged (speed mode), speed maintained the autopilot pitch channel (by adjusting elevator position in order to decrease climb angle, thrust maintained constant). when you are established at your cruising level, or when established on glide path, autothrottles will maintain speed constant increasing or decreasing thrust. the elevator not adjusted controlling speed in alt hold or app mode. Question Aeroplane: Automatic Flight Control Systems 51 Answer 19
After having programmed your flight director you see that indications of your adi attitude director indicator are as represented in diagram n°1 of appended annex on this instrument command bars indicate that you must 1044 Increase flight attitude bank your airplane to left until command bars recentre on symbolic aeroplane, increase flight attitude bank your aeroplane to right until command bars recentre on symbolic aeroplane, decrease flight attitude bank your airplane to left until command bars recentre on symbolic aeroplane, decrease flight attitude bank your airplane to right until command bars recentre on symbolic aeroplane. Question Aeroplane: Automatic Flight Control Systems 51 Answer 20
When being engaged and without selecting a particular mode an automatic pilot enables Aeroplane stabilisation with attitude hold or maintaining vertical speed possibly automatic trim, aeroplane piloting guidance functions, a constant speed on track, wings horizontal, all aeroplane piloting guidance functions except maintaining radio navigation course lines. the basic function of an autopilot stabilisation (the stabilisation of aircraft around its centre of gravity). basic function achieved the inner loop systems. the advanced function 'guidance' (monitoring movements of centre of gravity in three dimensions of space). outer loop systems offer guidance facilities (altitude hold, heading hold, vnav, lnav). outer loops act from an external position on inner loop 'foo inner loop into manoeuvrig aircraft into achieving its aim. Question Aeroplane: Automatic Flight Control Systems 51 Answer 21
The position of a flight director command bars Indicates manoeuvres to execute, to achieve or maintain a flight situation, repeats adi hsi information, enables measurement of deviation from a given position, only displays information relating to radio electric deviation. Question Aeroplane: Automatic Flight Control Systems 51 Answer 22
In an auto pilot slaved powered control circuit system which ensures synchronisation Can itself, when it fails, prevent automatic pilot from being engaged, intervenes only when automatic pilot has been engaged, prevents uncommanded surface deflection when automatic pilot disengaged, inhibited when automatic pilot engaged. Question Aeroplane: Automatic Flight Control Systems 51 Answer 23
An autopilot system Must provide at least aircraft stabilisation functions, must provide at least aircraft guidance functions, must provide automatic take off functions, may provide automatic take off functions. Question Aeroplane: Automatic Flight Control Systems 51 Answer 24
During an automatic landing between 50 ft agl and touch down autopilot maintains A vertical speed according to radio altimeter height, a constant vertical speed, a vertical speed according to gps height, a constant flight path with reference to ground. the autopilot flares out at this stage progressively reducing vertical velocity. Question Aeroplane: Automatic Flight Control Systems 51 Answer 25
A flight control system which can in event of a failure complete automatically approach flare and landing called 'fail ' Operational, passive, soft, hard. Question Aeroplane: Automatic Flight Control Systems 51 Answer 26
Command bars of flight director may be present on 1 hsi 2 cdu 3 adi the combination that regroups all of correct statements Question Aeroplane: Automatic Flight Control Systems 51 Answer 27
Considering a flight director of 'command bar type The vertical bar associated with roll channel, vertical bar associated with pitch channel, horizontal bar associated with roll channel, horizontal bar may be associated with roll channel. Question Aeroplane: Automatic Flight Control Systems 51 Answer 28
Considering a flight director of 'command bar type 1 vertical bar always associated with roll channel2 vertical bar may be associated with pitch channel3 horizontal bar may be associated with roll channel4 horizontal bar always associated with pitch channelthe combination regrouping all correct statements , 4,, 2, 4,, 3, 4,, 2, 3, 4. Question Aeroplane: Automatic Flight Control Systems 51 Answer 29
During a final approach flight director system engaged in loc mode holding of localizer axis the position of vertical command bar indicates The correction on bank to be applied to join follow localizer axis, position of aircraft relative to localizer axis, instantaneous deviation between aircraft position the localizer axis, roll attitude of aircraft. Question Aeroplane: Automatic Flight Control Systems 51 Answer 30
Flying manually during a final approach flight director system engaged in g/s mode holding of ils glide slope if aircraft above ils glide slope horizontal command bar May be centred if pilot correcting to come back on to ils glide slope, cannot be centred, automatically centred since g/s mode engaged, will be centred only when establish on ils glide slope. Question Aeroplane: Automatic Flight Control Systems 51 Answer 31
Flying manually during a final approach flight director system engaged in g/s mode holding of ils glide slope if aircraft below ils glide slope horizontal command bar May be centred if pilot correcting to come back on ils glide slope, automatically centred since g/s mode engaged, deviates upward, whatever attitude of aircraft is, deviates downward, whatever attitude of aircraft is. Question Aeroplane: Automatic Flight Control Systems 51 Answer 32
Flying manually during a final approach flight director system engaged in loc mode holding of localizer axis if aircraft left of localizer axis vertical command bar May be centred if pilot correcting to come back on localizer axis, automatically centred since loc mode engaged, deviates to left, whatever attitude of aircraft is, deviates to right, whatever attitude of aircraft is. Question Aeroplane: Automatic Flight Control Systems 51 Answer 33
Flying manually during a final approach flight director system engaged in loc mode holding of localizer axis if aircraft right of localizer axis vertical command bar May be centred if pilot correcting to come back on localizer axis, cannot be centred, automatically centred since loc mode engaged, will be centred only when establish on localizer axis. Question Aeroplane: Automatic Flight Control Systems 51 Answer 34
The flight director engaged in heading select mode hdg sel heading 180° selected when heading 160° vertical bar of fd Is centered if bank angle of aircraft equal to bank angle computed the flight director calculator, centered if aircraft has a 2 ° left drift, centered if aircraft has a 2 ° right drift, cannot be centered. Question Aeroplane: Automatic Flight Control Systems 51 Answer 35
The flight director provides information the pilot To join to a desired path with optimum attitude, to remain within flight envelope, to join a desired track with a 45° intercept angle, to join a desired track with a constant bank angle of 25°. Question Aeroplane: Automatic Flight Control Systems 51 Answer 36
The horizontal command bar of a flight director Gives information about direction the amplitude of corrections to be applied on pitch of aircraft, repeats position information given the ils in horizontal plane, repeats position information given the ils in vertical plane, gives information only about direction of corrections to be applied on pitch of aircraft. Question Aeroplane: Automatic Flight Control Systems 51 Answer 37
The horizontal command bar of a flight director 1 repeats position information given the ils in horizontal plane 2 repeats position information given the ils in vertical plane 3 gives information about direction and amplitude of corrections to be applied on pitch of aircraftthe combination regrouping all correct statements Question Aeroplane: Automatic Flight Control Systems 51 Answer 38
The parameters taken into account the flight director computer in altitude hold mode alt hold are 1 altitude deviation2 engine rpm3 ground speed4 pitch attitudethe combination regrouping all correct statements the action taken the autopilot to maintain an altitude depends on how far aircraft from required altitude (altitude deviation). pitch attitude present altitude deviation are required. Question Aeroplane: Automatic Flight Control Systems 51 Answer 39
The purpose of a flight director to Reduce pilots workload presenting data in form of control commands, convey air traffic control information to pilot, provide an automatic landing system function, automatically steer aircraft to waypoints selected on cdu. Question Aeroplane: Automatic Flight Control Systems 51 Answer 40
The vertical command bar of a flight director Gives information about direction the amplitude of corrections to be applied on bank of aircraft, repeats position information given the ils in horizontal plane, repeats position information given the ils in vertical plane, gives information only about direction of corrections to be applied on bank of aircraft.
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