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M17 Propeller > Propeller Maintainence > Flashcards

Propeller Maintainence Flashcards

1
Q

Where do we static balance

A

During overhaul

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2
Q

What does static balancing do

A

Ensures centre of gravity lies on axis of rotation

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3
Q

What is horizontal balancing

A

Vanish or paint added light blade

Solder to metal tips

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4
Q

Vertical balancing

A

Weights added to hub

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5
Q

Static balancing on metal propeller tolerance

A

5700kg aircraft tolerance is 2gm

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6
Q

On a metal propeller to static balance where is metal removed from

A

Heavy side

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7
Q

How is balance corrected in using lead wool

A

Placing lead wool into balancing tube in hollow root of blade

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8
Q

Where are welch plugs

A

The head of bolt

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9
Q

When is dynamic balancing done

A

On a running engine

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10
Q

What system does turboprop to balance

A

Propeller balance monitoring system

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11
Q

What is aerodynamic balancing used for

A

High performance propellers

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12
Q

What is blade indexing

A

Correcting force for aerodynamic balancing

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13
Q

Where is correction factor marked

A

Blade root

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14
Q

What is blade tracking

A

Ability of one blade to follow the the other in the same plane of rotation

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15
Q

How are bent blades indicted

A

Tracking differences larger then 3mm

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16
Q

How intact does the surface coating need to be

A

100%

17
Q

What does loose tipping rivets indicate

A

Wood underneath is damaged and propeller out of service immediately

18
Q

What do you check for in wooden propellers

A

De lamination in layers of wood

19
Q

When are attachment bolts re tightened

A

After 25 flying hours

20
Q

What subjects a metal propeller to metal fatigue

A

Caused by dynamic loads

21
Q

What causes cracks to extend in metal propeller

A

Additional bending and centrifugal forces

22
Q

When should you never taxi

A

High power

23
Q

How should you pull small aircraft

A

By root

24
Q

When do you inspect metal propeller

A

Every 100 hours or annual check inspect propeller

25
Q

Can you cover the propeller

A

No

26
Q

Where is damage not permitted

A

On root of blade

27
Q

Where can steel propellers and blades be repaired

A

Approved repair facility

28
Q

What are the two examples of skin perforated damage

A

Lighting strike and holes

29
Q

What is manifold air pressure in a aspirated engine below

A

Ambient air pressure

30
Q

What is manifold air pressure called in supercharged engines

A

Boost pressure

31
Q

What speed can the propeller be placed into wind at

A

Not excess of 25 knots

32
Q

What happens when you move rpm to constant speed range

A

RPM should reduce then stabilise

33
Q

Engine ground running turboprop relations

A

Torque
Rpm
Fuel flow
Egt

M17 Propeller (7 decks)

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