sauceski
Which plastic is preffered for window manufacturing in aircraft?
Thermoplastic
One best practice when drilling large holes in plastics it should not be done in one step. The largest hole you should drill in one step should be:
1/4"
What cleaning products should be avoided when cleaning aircraft windows?
Ammonia based Windex
Warp threads run in what direction?
Along the length of the fabric
What is the most common repair stitch used on hand sewn repairs?
Base ball stitch
What are the 4 requirements for solid wood to meet aviation building standards?
Kiln dried, specific gravity not less than 0.36, quarter sawn and grain slope of 1" in 15*
In order for Fungus to grow in wood structure what moisture percentage range must be present for the greatest risk of growth?
20% - 25%
What is the Minimum run out for wood grain on a wood spar?
20 inches
When selecting lumber for my aircraft structural members what is the preferred style of cut should be used on the wood?
Quartersawn
What is the preferred method of the cutting of wood for use in aviation structure?
Quartersawn
When dealing with laminated aircraft wood, the grain of the pieces being laminated together shall run:
Parallel with each other
Drain holes found in wooden structured aircraft are normally what diameter?
.250 inch
What is the name of the shears or scissors called that cut a series of V's on fabric to help prevent the material from unravelling?
Pinking shears
When installing synthetic fabrics on aircraft parts what method would I use to tighten the fabric?
Hot iron
Why did they use organic fabrics instead of synthetic fabrics on aircraft built in the 1930s?
Organic fabrics where the only material at the time.
The Selvage edge of fabric runs parallel to what edge of the fibers?
Warp
After the fabric has been installed the first coat of nitrate dope should be applied using what method?
Brush
What is the best method to remove old dope when doing a local repair on my fabric covered wing?
With a dull bladed knife
What is the minimum percentage of strength required for fabric to remain certified for flight from new?
70%
Why do we install reinforcing tapes on a fabric covered wing?
They go under the lacing cord to prevent it from pulling through the fabric.
Mercerizing fabric involves the process of;
dipping cotton fabric in a hot solution of diluted caustic soda.
Fabric covered wing rejuvenators are used to?
Penetrate into old product to soften it and replace some of the plasticizers that have evaporated or oxidized.
Why on fabric covered aircraft was the fabric pat through the process called Mercerizing?
This process helped lo strengthen and make the fabric absorb dyes better and resist mildew.
The ends of fibers that are loosened and stick up like short hairs after they have been stiffened by the application of nitrate dope are known as?
Nap
In a Fabric covered aircraft select the slandard size of drain holes installed on the Wings?
1/8* is .125".
When aluminum powder is added to Butyrate Dope what is the purpose of this additive?
To minimize the damaging effects caused by the ultraviolet sun rays.
When considering the repair of a scratch on a pressurized aircraft window where would I look?
The window manufacturers manual.
Determining the depth of the flaw on an aircraft window is an essential skill. Of the following methods, which is the most precise?
Optical Micrometer.
A Chip on an aircraft window is defined as what?
A defect that involves a mark or flaw made by the breaking off or gouging out of a small piece.
When installing a window in the aircraft and the holes must be drilled for the fasteners how should they be drilled?
Half size and work up.