Aeroplane Aerodynamics and Navigation

Play an AI-generated podcast conversation about this lesson

Why is a compass filled with a liquid?

To reduce the effects of friction and wear

To make it aperiodic (correct)

To increase the weight on the pivot

To amplify the dip angle

What is the purpose of a damping device in a compass?

To amplify the dip angle

To make the magnet system dead beat or aperiodic (correct)

To reduce the effects of friction and wear

To increase the oscillation of the magnet system

What is a desirable property of a liquid used in a compass?

Corrosive properties

High viscosity

Low freezing point (correct)

High reactivity

What is the effect of the movement of the magnet system and its spider in the liquid?

It sets up small eddies that are quickly dissipated Signup and view all the answers

What is the purpose of a flexible element in a liquid-filled compass?

To accommodate changes in the liquid's volume Signup and view all the answers

What is the benefit of the liquid in a compass in terms of the weight on the pivot?

It reduces the weight on the pivot Signup and view all the answers

What type of liquids are normally used in compasses?

Mineral or alcohol Signup and view all the answers

What can cause a compass to become unserviceable?

External leaks and air bubbles Signup and view all the answers

Why is it important to check a new compass from overseas before use on Australian aircraft?

To ensure it is calibrated for operation in southern latitudes Signup and view all the answers

Why is low power lighting used in a compass?

To reduce the effect of magnetic fields Signup and view all the answers

What is used to supply power to the compass's illumination?

Screened cable or a twisted pair Signup and view all the answers

What is the purpose of compass illumination?

To make the compass useable for night-flying or flying in low light situations Signup and view all the answers

What is the effect of the Earth's magnetic field on the voltage induced in each secondary coil?

modifies the voltage induced Signup and view all the answers

What is the purpose of the collector horns in the flux valve?

To concentrate the magnetic field Signup and view all the answers

What is the output of the flux valve indicative of?

The aircraft's heading Signup and view all the answers

What is the characteristic of the voltage induced in each secondary coil when the flux valve is not exposed to an external magnetic field?

Equal in each secondary coil Signup and view all the answers

What is the purpose of the primary winding in the flux valve?

To induce an equal voltage in each secondary coil Signup and view all the answers

What determines the direction and intensity of the magnetic field through each leg of the flux valve?

The angular relationship of the flux detector to the Earth's magnetic field Signup and view all the answers

What type of error is corrected by rotating the compass or flux valve until the compass reads the corrected heading?

Coefficient A error Signup and view all the answers

When does the magnetism in the fuselage have no effect on compass accuracy?

On north-south headings Signup and view all the answers

What is the purpose of the compensator magnets located in the lateral axis across the aircraft?

To correct for Coefficient B error Signup and view all the answers

What is the direction of the imaginary magnet lying along the fore and aft axis of the aircraft fuselage?

Fore and aft axis Signup and view all the answers

When does the lateral magnetism modify the magnetic meridian?

Never, it only strengthens or weakens it Signup and view all the answers

What is the main reason why Coefficient B error affects compass accuracy on east-west headings?

The Earth's lines of flux travel north-south Signup and view all the answers

What is the purpose of comparing the datum compass reading with the aircraft compass?

To record the aircraft's magnetic heading and any deviation Signup and view all the answers

Why should non-magnetic tools be used when performing maintenance on direct-reading compasses?

To prevent magnetic interference from the tools Signup and view all the answers

What type of cables should be used to connect the compass light to reduce magnetic interference?

Screened cable or twisted pair Signup and view all the answers

What is the purpose of swinging an aircraft compass?

To calibrate the compass in an area free from unusual magnetic influences Signup and view all the answers

What type of materials should be used for panels and screws in the vicinity of direct-reading compasses and flux valves?

Non-ferrous materials Signup and view all the answers

Why should direct-reading compasses or flux valves not be exposed to magnetic fields?

To prevent the compass from veering significantly Signup and view all the answers

Aeroplane Aerodynamics and Navigation

Podcast Beta

Questions and Answers

Why is a compass filled with a liquid?

What is the purpose of a damping device in a compass?

What is a desirable property of a liquid used in a compass?

What is the effect of the movement of the magnet system and its spider in the liquid?

What is the purpose of a flexible element in a liquid-filled compass?

What is the benefit of the liquid in a compass in terms of the weight on the pivot?

What type of liquids are normally used in compasses?

What can cause a compass to become unserviceable?

Why is it important to check a new compass from overseas before use on Australian aircraft?

Why is low power lighting used in a compass?

What is used to supply power to the compass's illumination?

What is the purpose of compass illumination?

What is the effect of the Earth's magnetic field on the voltage induced in each secondary coil?

What is the purpose of the collector horns in the flux valve?

What is the output of the flux valve indicative of?

What is the characteristic of the voltage induced in each secondary coil when the flux valve is not exposed to an external magnetic field?

What is the purpose of the primary winding in the flux valve?

What determines the direction and intensity of the magnetic field through each leg of the flux valve?

What type of error is corrected by rotating the compass or flux valve until the compass reads the corrected heading?

When does the magnetism in the fuselage have no effect on compass accuracy?

What is the purpose of the compensator magnets located in the lateral axis across the aircraft?

What is the direction of the imaginary magnet lying along the fore and aft axis of the aircraft fuselage?

When does the lateral magnetism modify the magnetic meridian?

What is the main reason why Coefficient B error affects compass accuracy on east-west headings?

What is the purpose of comparing the datum compass reading with the aircraft compass?

Why should non-magnetic tools be used when performing maintenance on direct-reading compasses?

What type of cables should be used to connect the compass light to reduce magnetic interference?

What is the purpose of swinging an aircraft compass?

What type of materials should be used for panels and screws in the vicinity of direct-reading compasses and flux valves?

Why should direct-reading compasses or flux valves not be exposed to magnetic fields?

More Quizzes Like This

Aeroplane Electrical Systems Basics

Aeroplane Aerodynamics and Navigation

Aeroplane Navigation Principles: Latitude and Longitude

Aeroplane Aerodynamics and Navigation

Upgrade to continue