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21 Cards in this Set
- Front
- Back
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Name 2 types of aircraft fabric coverings? |
Cotton, glass (Synthetic) |
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What is the fabric warp? |
Direction along the length of the fabric |
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Name 3 types of machine sewn seams? |
French fell, folded fell, plain overlap |
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What is the standard tie off knot? |
A modified seine knot |
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What is the fabric selvage edge? |
The edge of the cloth, woven to prevent unraveling |
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Which methods are used to test doped fabric? |
Seybolt tester, punch tester |
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What is the maximum permissible deterioration for used aircraft fabric? |
30% used,70% new |
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How are ventilation holes reinforced? |
Plastic grommets, aluminum grommets, brass grommets |
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What should be done to a structure that will be covered with doped fabric? |
Doped proof it with a coating of aluminum foil, paint, or cellulose tape. |
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What rib stitch spacing is used when the original spacing is unknown? |
The rib stitch spacing chart in the AC 43.13 |
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What determines the quality, strength, and weight of fabric? |
Never exceed speed (vne), and wing loading |
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What are the specs for new grade A fabric? |
Vne over 160mph, wing load over 9lb/inch |
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What are the speces for intermediate grade fabric? |
Vne less than 160mph, wing loading under loading under 9lb/inch |
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Does moisture, mildew, chemicals, acids affect glass cloth? |
No |
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Why do you use reinforcing tape? |
To prevent stitching cord from cutting through the fabric |
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What is the tensile strength of hand and machine sewing thread? |
Hand 14lbs/strand, machine 5lbs/strand |
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What is the difference between nitrate and butyrate dope? |
Butyrate is cheaper, easier to apply, better adhesive, and fire resistance. |
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How do you determine butyrate from nitrate? |
With thinner, nitrates will soften immediately while butyrate takes longer. |
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What does a retarder do? |
Slow down the evaporation of the solvents in the dope |
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What does the aluminum paste do? |
Shield the fabric from UV rays |
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What creates pin holes? |
Too much thinner in dope, oil or water in the air supply |
