theory of flight Flashcards

1
Q

when a force is applied on a spinning object, the result will be felt at a maximum 90 degrees after force input. this is known as what?

A

gyroscopic precession

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2
Q

What does the collective control do in a helicopter?

A

controls movement around the vertical axis

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3
Q

The difference in lift between advancing and retreating side of rotor disk caused by different blade speed when moving in flight is known as what?

A

dissymmetry of lift

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4
Q

When does blade tip stall occur and how is it prevented?

A

When the airspeed is high, prevented by flying slower than normal

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5
Q

 Changing the radius of the rotor blades to keep angular momentum the same is described as what?

A

coriolis effect

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6
Q

When air vortices occur on the inside of the blade what is this known as?

A

vortex ring state

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7
Q

The angle that blades bend upwards in flight is known as what?

A

coning angle

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8
Q

when rotor RPM is too low and the pilot cannot regain thrust this is known as what?

A

over pitching

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9
Q

when a helicopter lands on one ski and shakes causing vibrations this is known as what?

A

ground resonance

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10
Q

when do blades reach maximum deflection after an input has been made?

A

90 degrees after input

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11
Q

What is the name given to the point of the blade that attaches to the rotor hub assembly?

A

root of blade

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12
Q

How is droop of static blades stopped on start up?

A

droop stop

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13
Q

which part of the blade is moving the fastest when in operation?

A

blade tips

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14
Q

how is blade tip path (dynamic balancing) checked for on helicopters?

A

colour coding

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