Fabrics Flashcards
What fabrics used in aircraft
Unbleached Linen or cotton fabric
What is cotton used for
To prevent chatting between fabric and the structure
Serrated pinked edge
String
Wax or nylon cord
How should fabrics be stored
20 degrees
Dry and clean
Preparation of fabrics
Sharp edges , bolts covered
Protection layer added
What is the relationship between warps and wefts
More warps than wefts
Covering material
Prefabricated envelops
Blanket method
What is a bollon Seam
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
What is a lap seam
Only used when specified by the manufacture
Hand sewing
Three stitches per cm
Lock stitch per 50 cm
Overhand stitch
Sudden change of section occurs
Beeswax
Used when not pre waxed
Prevents damage to hole and to assist sewing
Flaxing
Single cord used unless started other wise
What is boom stringing
Used on deep aerofoil passed around boom instead of typical stringing
Slip stream area , diameter of a prop plus one rib of a multi engine
diameter of a prop plus one rib of a multi engine
Prefabricated envelops
The envelopes are made loose enough to facilitate slipping them over the structure and to achieve the proper tautness after doping.