Gyros Flashcards

1
Q

Name the 2 behaviours of a rotating mass?

A

Rigidity and precession

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2
Q

What can increase the stability of a Gyro?

A

Increasing the Mass or Speed

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3
Q

What speed do the Vertical (attitude) gyro and Directional (heading) gyro spin?

A

15,000 rpm and 10,000 rpm respectively

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4
Q

A gyro is distorted, in which direction will it deflect?

A

90 degrees from the point of application in the direction the wheel is spinning

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5
Q

Precession is not desired in directional and vertical gyros but may be used in a?

A

Rate gyro because the amount of precession is related to the amount of force that caused it.

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6
Q

How many degrees of freedom does a vertical and directional gyro have?

A

2

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7
Q

How many degrees of freedom do a rate gyro and rate integrating gyro have?

A

1

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8
Q

What is a vertical gyro used for?

A

Pitch 85 Degrees and Roll 360 degrees indication

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9
Q

In what ways can the vertical gyro be erected?

A

Air Driven, Electric Driven or with two small steel balls

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10
Q

Apparent Drift is caused by?

A

The earths rotation

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11
Q

What is the earth rotation?

A

15 Degrees and hour

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12
Q

At which point on earth does a vertical gyro have maximum apparent drift?

A

At the equator

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13
Q

At which point on earth does a directional gyro have maximum apparent drift?

A

At the poles

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14
Q

What instrument is a rate gyro used in?

A

Turn and slip indicator

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15
Q

The bank angle of a correct flown aircraft depend on?

A

The speed of the aircraft

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16
Q

How are gyros driven?

A

In modern aircraft by electric motors at speeds between 6 and 20,000 rom. or pneumatically driven

17
Q

What is sensed by laser gyros and where are they used?

A

They sense angular rate and are used in IRS systems

18
Q

Where is the MAGNETIC north pole located on the earth?

A

On the south side of the earth.

19
Q

What is variation?

A

Is the difference in the direction of our geographic poles and the magnetic poles. .

20
Q

What are isogonic lines?

A

Lines of equal variation.

21
Q

What is inclination?

A

Inclination is the tendancy for the compass to want to pull downwards when at the poles . It is stronger at the poles and diminishes at the equator.

22
Q

What is the vertical reference line on a compass?

A

The Lubber Line

23
Q

What is soldered at the bottom of the float on a magnetic compass?

A

two small bar type permanent magnets aligned with zero and 18 marks .

24
Q

When is a magnetic compass heading correct?

A

When there is no acceleration, aircraft is horizontal and the reading is corrected with the deviation chard.

25
Q

Where would you find a flux valve installed?

A

In a wing tip or a location on the aircraft that has a minimum of magnetic interference caused by various electrical circuits.