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Mod 6 > 6.3.3 > Flashcards

6.3.3 Flashcards

1
Q

Before covering a component with fabric what must be done?

A

It must be inspected, cleaned, protective treatment applied

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2
Q

What are the most suitable conditions for application of fabrics?

A

Room temperature of 16-21C and humidity of 70%

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3
Q

What are aircraft fabrics woven from?

A

Spun threads or yarns

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4
Q

What is Cotten tape referred as?

A

Egyptian tape

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5
Q

Where is cotton tape mostly used?

A

Areas of chafing or protection against stringing cords

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6
Q

What material is used for stringing?

A

Flax cordage

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7
Q

How should all materials used for fabric coverings be stored?

A

In a dry clean area away from direct sunlight at a temperature of 20C

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8
Q

When serious chafing is going to occur what can be used for protection?

A

A canvas or leather patch

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9
Q

How could seams never be made on fabric covering?

A

At a right angle to the direction of airflow

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10
Q

What are the two types of machined seams?

A

Ballon seam and lap seam

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11
Q

What is the balloon seam also known as?

A

The french fell

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12
Q

When should the ballon seam be used?

A

Always unless stated otherwise

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13
Q

After the seam is completed how should it be examined?

A

By a string electric light

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14
Q

When should the lap seam be used?

A

When specified by the manufacturer

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15
Q

What type of stitching is used for repairs?

A

Herring-bone stitch and boot stitch

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16
Q

What is the overhand stitch also known as?

A

Trailing edge stitch

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17
Q

What is the overhand stitch used for?

A

When a sudden change of section occurs (Trailing edges, wing tips, wing root ends)

18
Q

If a thread for hand sewing has not been pre-waxed what should you do?

A

Give it a coating of beeswax

19
Q

Where is dope generally used?

A

Attaching fabric to plywood

20
Q

How many coats of tautening dope should be applied before fabric is applied?

A

Two

21
Q

Where are drainage holes located?

A

Lower surface of components or moisture entrapment areas

22
Q

What are the two types of eyelets (grommets)?

A

Drainage eyelets and shielded eyelets

23
Q

Why is it important for access to be provided at specified positions in all fabric coverings?

A

For inspection or servicing purposes

24
Q

What are the three types of inspection panels on fabric aircraft?

A
  • woods frame
  • zip panels
  • spring panels
25
Q

What is a woods frame?

A

When a doped celluloid sheet is placed onto a inspection hole cut out

26
Q

What is the disadvantage of a woods frame?

A

A new patch has to reapplied every time

27
Q

What is a zip panel?

A

When an inspection panel is in the shape of a vee has two zips on the sides

28
Q

What is the spring panel?

A

An inspection panel that has a light alloy reversible dish for easy removal and refit

29
Q

How is dope removed from a fabric?

A

By using thinners

30
Q

What is the herringbone stitch also known as?

A

Ladder or baseball stitch

31
Q

When should the herringbone stitch be used?

A

When the repair is in a straight line

32
Q

Once the herringbone stitch is complete what should you do?

A

Place a 1inch wide serrated tape over it and then place a fabric patch on top

33
Q

What type of wood is used in woods frame?

A

2mm plywood

34
Q

If damage to a fabric is more than 4inches what is used?

A

An insertion repair patch

35
Q

What thread is used for a boot stitch?

A

A single well waxed number 18 linen thread

36
Q

What are the two portable types of fabric testers?

A

Seyboth and maule

37
Q

Which portable fabric tester will break the surface of the fabric?

A

The seyboth tester

38
Q

How should the fabric from a seyboth tester be repaired?

A

With a 50-75mm patch

39
Q

Why should fabric testers not be done on double layer fabrics?

A

It will not give you an accurate measurement

40
Q

How does a bursting strength test work?

A

Force is applied to a steel ball which is in contact with the fabric and the resulting force needed to break the fabric is the answer

41
Q

How many test samples are sent to fabric laboratory tests?

A

Six warp and six weft

Mod 6 (17 decks)

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