Aeroplane Systems: Battery Unit and Power Supply

Play an AI-generated podcast conversation about this lesson

What is the primary function of the battery unit in an aircraft?

To maintain a trickle charge supply to the INU

To provide a backup power supply during normal operation

To regulate the power supply to the INS

To provide an uninterruptible power supply during power failures (correct)

During normal operation, what is the status of the battery unit?

It is in charging mode

It is on standby (correct)

It is in maintenance mode

It is in active mode

What is the primary difference between an Inertial Navigation System (INS) and an Inertial Reference System (IRS)?

The accuracy of the navigation

The method of stabilizing the platform (correct)

The type of sensors used

The power consumption

What is the name given to the IRS system due to the way the accelerometers and ring laser gyros are mounted?

Strapdown system Signup and view all the answers

What is the purpose of the electronic modification of the accelerometer outputs in an IRS?

To compensate for attitude changes Signup and view all the answers

Why have innovations in laser detecting and computation power led to the introduction of IRS systems?

To provide an alternative to INS systems Signup and view all the answers

Why should the accuracy of bearing indications be checked by other means when flying near a thunderstorm?

Because thunderstorms can cause radio interference Signup and view all the answers

What is the frequency range of the VOR signal?

108-118 MHz Signup and view all the answers

Why is the VOR system strictly line-of-sight?

Because VOR signals are blocked by solid objects Signup and view all the answers

How does the VOR receiver determine the direction of the VOR transmitter?

By sensing the phase difference between the two signals Signup and view all the answers

What type of modulation is used for the reference signal in a VOR system?

Amplitude Modulation (AM) Signup and view all the answers

What does the VOR system provide to an aircraft?

Only bearing to a station Signup and view all the answers

What is the purpose of the glideslope signal in an Instrument Landing System?

To provide vertical guidance to the aircraft Signup and view all the answers

Where is the glideslope transmitter and antenna located?

Near the runway threshold Signup and view all the answers

What is the frequency range of the glideslope signal channels?

328-335 MHz Signup and view all the answers

What is the shape of the glideslope signal radiated by the transmitter?

Two intersecting lobes Signup and view all the answers

What is the modulation frequency of the upper lobe of the glideslope signal?

90 Hz Signup and view all the answers

At what angle above the horizontal does the line of equal modulation define the glideslope approach path?

3° Signup and view all the answers

What is the acronym LASER an abbreviation for?

Light Amplification by Stimulated Emission of Radiation Signup and view all the answers

What is a characteristic of the light produced by a laser?

It is of specific wavelength and the waves are in phase Signup and view all the answers

What happens to the person walking with the direction of rotation on the merry-go-round platform?

They need to take shorter steps to complete the journey Signup and view all the answers

What is similar to the phenomenon of the laser gyro in the merry-go-round platform example?

Walking on an escalator Signup and view all the answers

What is the purpose of a laser gyro in an aircraft?

To provide navigation outputs Signup and view all the answers

What is the type of gyro used in the context of the passage?

Ring Laser Gyro Signup and view all the answers

What type of information is generally updated every 28 days by maintenance personnel?

Waypoints and airways Signup and view all the answers

What is the primary limitation of barometric altimeters?

Inaccurate readings in mountainous areas Signup and view all the answers

What do radio altimeters use to measure the height of an aircraft?

Radar signals Signup and view all the answers

What is the name of the system that measures altitude by reference to local air static pressure?

Barometric Altimeter Signup and view all the answers

What are the two basic methods used for measuring height in altimeters?

Pulsed systems and Frequency Modulated Continuous Wave systems Signup and view all the answers

What is the term used to describe the Frequency Modulated Continuous Wave systems?

Radio Altimeter Signup and view all the answers