Aircraft Covering Flashcards
How would you determine the strength requirements for fabric used to re-cover an aircraft
Must be of at least the quality and strength of the fabric used by the original manufacturer
What two types of organic fibers are used for covering aircraft
Cotton and linen
What is meant by warp, weft, and bias
Warp is the direction along the length of the fabric,
Weft is the direction across the fabric at right angles to the warp, and bias is a direction at 45 degree angle to warp and weft
What is the purpose of the selvage edge on a roll of fabric
It prevents the fabric from unraveling
How are the fabric type and strength requirements determined from fabric covered aircraft
The original manufacturer determines the fabric type and the strength requirements
What types of synthetic fibers are used for covering aircraft
Fiberglass and nylon
Which of the several types of fabric is unaffected by moisture and mildew
Fiberglass
What is the function or purpose of reinforcing tape
To prevent the lacing cord from cutting through the fabric
Where would you use surface tape
Over rib stitching and sewed seams, over lapped edges, around corners, and along leading and trailing edges
How should the edges of drainage inspection and ventilation holes be reinforced
With plastic, aluminum, or brass grommets
Fabric is considered unairworthy when it has deteriorated to what percentage of its original strength
Less than 70% or more than 30%
How should a structure that will be covered with doped fabric be prepared following inspection and prior to covering
Treat it with protective coating of paint or varnish
What is the principle advantage of the envelope method for covering wings
Almost all the seams are machine sewed by the envelope supplier
What is a tie off knot
A standard modified seine knot
Name three common types of machine sewed seams
Plain overlap, folded fell, and French fell
Where are anti tear strips used
Used on the upper surface of the wing and bottom used on aircraft that don’t exceed speed 250 mph
How would you determine the correct spacing for rib stitching if the original spacing was unknown
Consult the chart in AC 43.13-1B
What type of knot is used for locking the stitches that are used for rib lacing on a fabric covered aircraft wing
A modified seine knot
What are two methods of applying the fabric to the wing of an airplane
Blanket method and envelope method
How wide should the surface tape be that is used to cover the trailing edge of an aircraft wing
Three inches wide
What type of machine sewed seams are used in aircraft covering
Plain overlap seams, folding fell seams, and French fell seams
Aircraft covering fabrics made of materials from what two sources
Organic materials and synthetic materials
What methods are used to check the strength of dope fabric
Fabric punch tester or labitory test
If the original rib stitch facing can not be determined when recovering an aircraft what rib stitch facing should be used
Rib stitch facing chart in AC 43.13-1A
What do you call the edge of cloth, tape or webbing that has been proven to prevent reviling
Salvage tape
