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22 Cards in this Set
- Front
- Back
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What determines the Required Quality and Strength of Fabric that is to be used for covering aircraft? |
(PSF) Pounds per square foot of Wing Loading & (VNE) never exceeding speed of the Aircraft |
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When are anti tear strips recommended and where are the used? |
They are installed over the ribs, longerons and stringers. They are recommended for all areas in the slipstream. |
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What is the maximum permissible deterioration of aircraft fabric before it is considered unairworthy ? |
30 % from its original required tensile strength |
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What should be the strength of the fabric used for recovering an aircraft? |
Should be of high grade aircraft textile material. It must be at least as good quality and equal strength as one previously used. |
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What is the purpose and location of drain grommets in aircraft fabric? |
Drain Grommets are used to drain the condensed moisture out of the aircraft it also created ventilation. It is located underside of airfoils |
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How are drain grommets installed in aircraft fabric ? |
Doped to the covering. It is also installed with a second coat of dope and the drain holes are opened by cutting out the fabric in the center of the grommet. |
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Name the methods of applying fabric to an aircraft wing? |
Blanket and envelope method |
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What is the purpose of reinforcing tape? |
Reinforcing tape prevents the stitching cord from tearing through the fabric. |
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What type of fabric is not affected by moisture or mildew? |
Fiberglass fabric is not affected by moisture or mildew. |
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What methods are used to check the strength of doped fabric? |
A fabric punch test (Maul test) & lab test |
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What type of machine-sewed seems are used in aircraft covering? |
Plain overlap, Folded-fell and French-fell seams. |
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What should be done with structure that will come in contact with doped fabric? |
Structure that will come in contact should be treated with a protective layer. (examples: aluminum foil, dope proof paint, cellulose tape & etc;) |
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if the original rib stitch spacing cannot be determined when recovering an aircraft, where can you find the rib stitch spacing chart that should be used? |
Use the AC. 43.13-1B to find the rib stitch spacing chart. |
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What is the standard tie-off knot used during rib stitching? |
The modified Seine knot |
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What do you call the edge of a cloth, tape, or webbing that has been woven to prevent raveling? |
Selvage edge (originates from word Self-Edge) |
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The types of fabric used for covering aircraft are organic and synthetic. (Provide 2 examples of each) |
Organic: Cotton & Linen Synthetic: Fiberglass & Nylon |
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When covering aircraft, where is surface tape used? |
Surface tape is used on ALL stitching. |
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Name the advantages of using the envelope method to cover fabric aircraft |
The advantages are that the majority of the sewing is done by machine. |
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How are wrinkles removed from cotton fabric? |
By wetting the wrinkles and allowing them to dry |
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When is finishing tape applied? |
It is applied after the second coat of dope is dry. |
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How wide should surface tape be when used to cover the trailing edge of the aircraft |
3 Inches. |
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What is the recommended type of repair for an L shaped tear when the legs are more than 14 inches long? |
a doped on patch, as long as the never exceed speed is less than 150 mph. |
