Explanations: Aircraft Covering Flashcards
What is a French-Fell seam?
In a french-fell, machine-sewed seam used to join aircraft fabric, the edges of the fabric are folded over each other so the threads of the double row of stitches passes through four thicknesses of fabric.
Where should finishing tape be applied?
Over all lacing, seams, (both machine and hand sewn), corners, edges, and places where wear is likely to occur.
How do you repair an L-shaped tear in aircraft fabric?
Using a curved needle and well-waxed thread, start at the center of the tear and make baseball stitches every quarter inch to the end of the tear.
After both sides of the tear have been stitched, remove the colored and silver dopes by softening them with dope thinner or acetone.
Dope on a patch that extends at least 1-1/2 inches beyond all edges of the tear.
What is fabric rejuvenator?
It is a dope-like finishing material that has powerful solvents and plasticizers.
When dope has aged and cracked, its resilience can be restored with rejuvenator. Rejuvenation does nothing to restore strength to deteriorated fabric.
Where is a plain lapped seam satisfactory?
Where selvage edges or pinked edges join.
How is dope proofing performed?
by covering all the parts that will come into contact with doped fabric with a protective coating such as aluminum foil or cellulose tape.
