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M6 > Fabrics > Flashcards

Fabrics Flashcards

1
Q

What fabrics used in aircraft

A

Unbleached Linen or cotton fabric

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2
Q

What is cotton used for

A

To prevent chatting between fabric and the structure

Serrated pinked edge

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3
Q

String

A

Wax or nylon cord

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4
Q

How should fabrics be stored

A

20 degrees

Dry and clean

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5
Q

Preparation of fabrics

A

Sharp edges , bolts covered

Protection layer added

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6
Q

What is the relationship between warps and wefts

A

More warps than wefts

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7
Q

Covering material

A

Prefabricated envelops

Blanket method

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8
Q

What is a bollon Seam

A

French fell

the seam, the edges of the fabric are folded back and are then fitted into each other, tacked together and then machine sewn

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9
Q

What is a lap seam

A

Only used when specified by the manufacture

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10
Q

Hand sewing

A

Three stitches per cm
Lock stitch per 50 cm
Overhand stitch
Sudden change of section occurs

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11
Q

Beeswax

A

Used when not pre waxed

Prevents damage to hole and to assist sewing

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12
Q

Flaxing

A

Single cord used unless started other wise

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13
Q

What is boom stringing

A

Used on deep aerofoil passed around boom instead of typical stringing

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14
Q

Slip stream area , diameter of a prop plus one rib of a multi engine

A

diameter of a prop plus one rib of a multi engine

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15
Q

Prefabricated envelops

A

The envelopes are made loose enough to facilitate slipping them over the structure and to achieve the proper tautness after doping.

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16
Q

Blanket

A

length of fabric is used and covers are made-up on the site. Lengths of fabric, or a number of lengths joined side-by-side, being used to cover the aircraft structure.

17
Q

Seams

A

The seams in the fabric covering should be either parallel to the fore-and-aft line of the aircraft or on a bias, depending on the covering method used

18
Q

Attachment of fabric to plywood

A

Dope
Smoother with fine glass a paper
Wood treated with one coat of tautens he dope and another
Fabric stretched over wood

19
Q

Attachment of Fabric to Metal Surfaces

A

the fabric is generally doped into position. Alternatively, a thermoplastic adhesive may be used and guidance on the use of this material may be obtained from the relevant aircraft manuals.

20
Q

Drainage holes

A

usually positioned in the lower surface of components or wherever entrapment of moisture is possible, but when holes are used for ventilating purposes

21
Q

Drainage eyelets

A

Drainage eyelets (grommets) are usually oval or circular in shape and are doped onto the surface of the fabric

22
Q

Maule tester

A

Spring loaded with a blunt point
Pushed down on the fabric until the point found in book
Fabric penatrated has failed test

23
Q

What does aluminium dope do

A

Makes fabric uv protected

M6 (13 decks)

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