Aircraft coverings Flashcards
(13 cards)
what two types of fabric are used for covering aircraft
organic and polyester(synthetic)
what are the organic fibers used for covering aircraft
cotton and linen
what determines the quality and strength requirements for fabric covered aircraft
the original manufacturer by the never exceeded speed and wing loading
what is the fabric warp
the direction along the length fabric
what is the purpose of reinforcing tape
most commonly used in rib caps after the fabric covering is installed to protect and strengthen the area for attaching the fabric to the ribs
what should be done to a structure that will be covered with doped fabric
Dope proof it with a protective coating of an approved primer or varnish if it is a wood structure. Cover sharp edges, metal seams, the heads of rivets, and any other feature that might cut or wear through with anti chafe tape
what is one advantage of the envelope method of covering wings
saves time by using precut and pre sewn envelopes; or envelops must be sewn with approved machine sewing thread, edge distance, fabric fold or envelops are slid into position, oriented with the seams in the proper place
how are ventilation and drainage hole edges reinforced
with plastic or aluminum grommets
what methods are used to check the condition of dopes fabric
a test strip, punch tester or when results are marginal, a laboratory test is needed
what is the maximum permissible deterioration for used aircraft fabric
30 percent of the original fabric strength
what is fabric selvage edge
an edge of cloth woven to prevent raveling
what rib lace spacing is used when original spacing is unknown
use the chart in AC43.13-1B
what is a tie off knot
a modified seine knot is normally used on all stitches other than the starting stitch
