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Aircraft Operations > Flight Instruments > Flashcards

Flight Instruments Flashcards

1
Q

Name three pitot instruments

A

Altimeter
Vertical Speed Indicator (VSI)
Air Speed Indicator (ASI)

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2
Q

Name three gyroscopic instruments

A

Attitude Indcator/Artifical Horizon
Heading Indicator/Gyrosyn Compass
Turn Co-ordinator

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3
Q

What are the two ways that pitots sense air?

A

Statically and Dynamically

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4
Q

What is Dynamic air?

A

Dynamic air that which is encountered when the aircraft is moving forwards.

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5
Q

What is Static air?

A

Static air is not in the direct flow of air over the aircraft in flight.

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6
Q

If an aircraft has the sub-scale setting lower than the current pressure, will it be flying higher or lower than the assigned altitude?

A

The aircraft will be flying higher than the assigned altitude.

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7
Q

How does the altimeter measure altitude?

A

By comparing the static air pressure to the pressure of an aneroid capsule.

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8
Q

How does the VSI measure vertical speed?

A

By comparing the static air pressure to the delayed static air pressure coming through a calibrated tube.

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9
Q

How does the ASI measure airspeed?

A

By comparing the difference between the static pressure and the dynamic pressure received from the pitot tube.

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10
Q

Name the V Speeds

A

Vf = Flap Operating Speed Range
Vno = Normal Operating Speed
Vo = Max manoeuvring Speed
Vne = Never Exceed Speed

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11
Q

What colour is the Vf speed range?

A

White

Flap Operating Speed Range

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12
Q

What colour is the Vno speed range?

A

Green

Normal Operating Speeds

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13
Q

What colour is the Vo speed range?

A

Yellow

Max Manoeuvring Speed

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14
Q

What colour is the Vne speed range?

A

Red

Never Exceed Speed

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15
Q

Name some errors associated with the ASI

A

Instrument Errors
Position Errors
Density Errors
Compression Errors
A Static Blockage
A Pitot Blockage

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16
Q

For certification purposes, what is the acceptable range of ASI errors?

A

3% or 5kt

17
Q

What are the two most important properties of a gyroscope?

A

Inertia and Precession

18
Q

What is gyroscopic inertia?

A

The tendency of the gyro to keep a fixed position relative to space, often referred to as rigidity in space.

19
Q

What is gyroscopic precession?

A

When subjected to a force, the gyro acts as though the force has been applied at 90 degrees to the rotor, at a position 90 degrees forward in the direction of rotation of the rotor.

20
Q

How are gyroscopic instruments powered on an aircraft?

A

Through a vacuum or electrical system.

Aircraft Operations (10 decks)

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