Aircraft Speeds and Airspeed Indicators

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What does the blue line on an airspeed indicator correspond to?

Speed not to be exceeded (correct)

Minimum control speed

Maximum speed in operations

Optimum climbing speed with one engine inoperative

What do modern airspeed indicators indicate in the absence of static and instrumental error?

The airspeed, whatever the altitude

The true airspeed

The equivalent airspeed

The calibrated airspeed in all cases (correct)

What limits the captain of a pressurized aircraft during descent?

Initially by the MMO, then by the VMO below a certain flight level (correct)

Initially by the VMO, then by the MMO below a certain flight level

By the MMO

By the VMO in still air

What formula are anemometers calibrated according to?

St-Venant' formula which takes into account the air compressibility Signup and view all the answers

What does the airspeed indicator measure?

Total pressure Signup and view all the answers

What is the purpose of the blue line on an airspeed indicator?

To indicate the speed not to be exceeded Signup and view all the answers

What happens to the airspeed in headwind and tailwind?

It remains unchanged Signup and view all the answers

Which instrument will give an incorrect indication when side-slipping?

Vertical Speed Indicator Signup and view all the answers

What is the definition of Indicated Airspeed (IAS)?

The airspeed you read directly from the airspeed indicator Signup and view all the answers

What is the definition of Calibrated Airspeed (CAS)?

Indicated airspeed corrected for installation and instrument errors Signup and view all the answers

What is the definition of True Airspeed (TAS)?

Actual speed of an aircraft over ground Signup and view all the answers

What is the definition of Groundspeed (GS)?

Actual speed of an aircraft over ground Signup and view all the answers

What is the Mach number independent of?

outside temperature Signup and view all the answers

What is the principle of the Mach indicator based on?

the ratio of Pt - Ps to Ps Signup and view all the answers

What is the Mach number?

true airspeed divided by the local speed of sound Signup and view all the answers

How is the indication of Mach number obtained?

from an air data computer Signup and view all the answers

What happens to the Mach number at a constant calibrated airspeed when the altitude increases?

it increases Signup and view all the answers

What is affected by a change in outside temperature at a constant calibrated airspeed?

none of the above Signup and view all the answers

What is the primary function of an airflow valve in an autopilot system?

To regulate airflow to the sensors Signup and view all the answers

What are the primary modes of an autopilot system?

Pitch attitude hold, pressure altitude hold, and heading hold Signup and view all the answers

What is the source of height information during a Category II automatic approach?

Radio altimeter Signup and view all the answers

What happens when a pilot releases the control wheel after engaging the control wheel steering (CWS) of a conventional autopilot?

The autopilot will restore the flight attitude and the rate of turn selected Signup and view all the answers

What is the purpose of a servo-actuator in an autopilot system?

To move the flight control surfaces Signup and view all the answers

What does the combination of sensors, comparators, computers, and amplifiers achieve in an autopilot system?

They process the sensor data and generate control signals Signup and view all the answers

What function does an autopilot system perform in Altitude Hold mode?

Holds the altitude Signup and view all the answers

What is the purpose of the synchronization system in an autopilot slaved powered control circuit?

To prevent uncommanded surface deflection when the automatic pilot is disengaged Signup and view all the answers

What happens when the pilot alters the barometric pressure setting on the altimeter while the autopilot is in Altitude Hold mode?

The aircraft remains at the same altitude, using pressure information from the altimeter Signup and view all the answers