Airspeed Indicator Quiz

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Questions and Answers

What does the airspeed indicator display?

Speed of the aircraft relative to the wind
Speed of the aircraft relative to the surrounding air (correct)
Speed of the aircraft relative to the ground
Speed of the aircraft relative to the magnetic north

What must be corrected to obtain the speed over the ground from the indicated airspeed?

Altitude and temperature
Air density and wind conditions (correct)
Humidity and wind speed
Pitot-tube pressure and static pressure

What is used for accurate navigation to correct the direction indicated by the magnetic compass?

HSI (Horizontal Situation Indicator) (correct)
GPS (Global Positioning System)
VOR (VHF Omnidirectional Range)
ADF (Automatic Direction Finder)

Why can the magnetic compass be unreliable when the aircraft is turning, climbing, descending, or accelerating?

<p>Due to the inclination of the earth’s magnetic field (B)</p> Signup and view all the answers

What is necessary to obtain the direction of true north or south for accurate navigation?

<p>Correct the direction indicated by the magnetic compass (B)</p> Signup and view all the answers

Flashcards

What does the airspeed indicator show?

The speed of the aircraft relative to the surrounding air.

What needs to be corrected to find ground speed?

Air density and wind conditions must be corrected to obtain the speed over the ground from the indicated airspeed.

What's used for accurate navigation?

The HSI (Horizontal Situation Indicator) is used for accurate navigation to correct the direction indicated by the magnetic compass.

Why can the magnetic compass be unreliable?

The magnetic compass can be unreliable when the aircraft is turning, climbing, descending, or accelerating because of the inclination of the earth’s magnetic field.

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What's needed for accurate navigation?

To obtain the direction of true north or south for accurate navigation, the direction indicated by the magnetic compass must be corrected.

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Study Notes

Airspeed Indicator

Displays the aircraft's indicated airspeed (IAS), which is critical for determining performance.
Indicates the speed of the aircraft relative to the surrounding air.

Indicated Airspeed vs. Ground Speed

To calculate ground speed, correction for wind effects is necessary.
Ground speed is the aircraft's true speed over the ground, incorporating headwinds or tailwinds.

A compass deviation chart is used to correct the magnetic compass direction.
Errors can be caused by electrical equipment, magnetic fields, and other onboard instruments.

Magnetic Compass Limitations

Unreliable during aircraft maneuvers such as turns, climbs, descents, or accelerations.
Causes include acceleration error, turning error, and dip error affecting readings.

A gyroscopic heading indicator or GPS is required to determine true north or south accurately.
These instruments account for magnetic variation, ensuring reliability in navigation.

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Description

Test your knowledge of aviation instruments with this quiz on the airspeed indicator. Learn about how the instrument measures aircraft speed and factors that affect its accuracy. Perfect for aviation enthusiasts and pilots.