29 Questions
What is the purpose of the slip rings and brushes in an AC electric gyro?
To feed the three-phase supply to the gyro stator
What is the approximate speed of the rotor in an AC electric gyro?
20 000–23 000 rpm
What is the effect of the current induced in the rotor bars in an AC electric gyro?
It interacts with the stator's rotating field, causing the rotor to turn
What is the advantage of DC gyro systems in terms of their operation?
They are simple to operate
What is the primary advantage of AC electrically powered gyros over air-driven gyros?
They provide a more rigid gyroscopic reference
What indicates the failure of the power supply in an AC electric gyro?
A flag marked 'off'
What is the design goal for the rotor and its bearings in an electrical gyroscope?
To concentrate the mass of the rotor near the periphery
What type of motor is used in an electrical gyroscope?
Squirrel cage induction motor
What is the function of the outer gimbal ring in an electrical gyroscope?
To support the inner gimbal ring
What is the primary advantage of electrical gyros over pneumatically driven gyros?
They require less maintenance effort
What is the purpose of the front cover glass and rear casting in an electrical gyroscope?
To support the outer gimbal ring
What is the primary function of a gimbal synchro?
To rotate the pitch bar or horizon disc to indicate the changing attitude of the aircraft
During an ILS approach, what happens if the aircraft is above the glide path?
The glide slope pointer is deflected downwards
What is the purpose of the servomotors in an attitude indicator system?
To rotate the pitch bar or horizon disc to indicate the changing attitude of the aircraft
During an ILS approach, what happens if the aircraft is to the left of the localiser beam and runway centreline?
The localiser pointer is deflected to the right
What is the difference between a gimbal synchro and an indicator synchro?
The error signal is amplified and routed to the servomotor
What is the function of the ILS receiver on board the aircraft?
To detect the signals beamed from ground transmitters
What is the primary purpose of regularly caging and resetting the directional gyroscope during flight?
To ensure the correct alignment with the aircraft's heading
What is the maximum degree of movement allowed by the inner gimbal?
85 degrees either side of the perpendicular
What is the position of the pointer when the direction has been satisfied?
Vertically through the centre position of the horizon disc
What is the function of the torque generated by the rotor exhaust air in the directional gyroscope?
To maintain the inner gimbal erect to the outer gimbal
What is the purpose of the pitch command knob?
To adjust the pitch command bar to the aircraft's level flight attitude
What happens to the command bars when the mode selector is off?
They are removed from view
What is the primary function of the compass card in the heading indicator?
To indicate the aircraft's heading
What is the output of the flight director computer?
Two command or steering pointers on the ADI
What is the purpose of the bevel gear arrangement in later designs of the directional gyroscope?
To produce a vertical display of the aircraft's heading
What is the significance of the lubber line in the heading indicator?
It represents the direction of the aircraft's nose
What information does the flight director computer process from the pilot's selection?
Information from the pilot's flight director mode select panel
What is the purpose of the conventional meter movements?
To position the glideslope, localiser, flight director steering command pointer and valid flags
Learn about the benefits and construction of electrical gyros in aircraft, including their power supply, operation, and maintenance advantages. Understand how they differ from air-driven gyros and their components. Test your knowledge of electrical gyros in aircraft systems.
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