Airframe Flashcards
What method is used to prepare plywood for bending
Soak in hot water then placed in a form until completely dry
What are the results of using insufficient gluing pressure when making a wood joint
Thick glue lines
Why does the strength of the scarf joint depend upon the accuracy of the two beveled surfaces
In accurate bevel will reduce the amount of affective glue area
What type of patches preferred for repair of stressed plywood skin and why
Scarf patch. The edges are scarfed to a 12 to 1 slope instead of a 5 to 1 slope
Are mineral streaks acceptable in aircraft wood
Yes as long as there’s no decay
What area of the wood spar may not be spliced
Wing attachment fittings, landing gear fittings, engine mount fittings, or lift-and-interplane fittings
What type of joint is generally used in splicing structural members in aircraft
A scarf joint
What is compression wood and why is it not acceptable for aircraft structures
Characterized by high specific gravity and has the appearance of an excessive growth of Summer wood. Defect is difficult to recognize and is very detrimental to strength
What determines the required quality and strength of fabric that is to be used for covering aircraft
By the pounds per square foot of wing loading in the never exceed air speed of the aircraft
When are anti-tear strips recommended and where are they used
Installed over ribs, longerons, and stringers but are under the reinforcing tape before the fabric is installed. recommended for all areas in the slipstream
What should be the strength of the fabric used for re-covering an aircraft
High-grade aircraft textile material
What is the purpose and location of drain grommets in aircraft fabric
Allow the condensed moisture to leave the aircraft as well as furnish ventilation located on the underside of airfoils
What type of machine so seems are used an aircraft covering
Plain overlap seams, folded fell seams, and trench fell seems
What should be done with the structures that will come into contact with doped fabric
Protective coating such as aluminum foil, dope proof paint, or cellulose tape
What is the standard tie off knot used during rib stitching
Modified Seine knot
What do you call the edge of cloth tape or webbing that has been proven to prevent raveling
Selvage edge
Name two organic and two synthetic types
Organic fibers are cotton and linen. The Synthetic fibers include fiberglass and heat shrinkable synthetic fibers such as nylon and Dacron
When covering aircraft where is surface tape used
Sewed seems, lapped edges and all stitching is covered with surface tape
When is finishing tape applied
After the second coat of dope is dry and the nap has been sanded away
What is the recommended type of repair for an L-shaped tear when the legs are more than 14 inches long
A dope on patch as long as the never exceed velocity is less than 150 mph
What primer is used when the maximum protection of the metal is desired
Epoxy
What is the purpose of using fungicidal dope on finishing aircraft fabric
To prevent microbiological deterioration
What are two types of dope used for aircraft finishes
Nitrate and butyrate
What would happen if dope was ever used over paint or enamel
Lift and remove such materials
What is applied to metallic surfaces as a common resistance covering before the application of enamel or lacquer
Zinc chromate primer
What can be done to the surface of components to prevent filiform corrosion
Ensure the primer is completely cured
What are the most common methods of applying aircraft finishes
Dipping brushing or spraying
What is used to thin chromate primer
Toluene
Which federal regulation prescribes the size and location requirements for aircraft identification numbers
Far part 45
What type of materials should be thoroughly protected when using paint remover
Synthetic rubber surfaces, aircraft tires, fabric, and acrylics
