Aircraft Structural Assembly and Rigging Flashcards
Nam several secondary flight controls and describe their general purpose.
trim tabs, balance tabs, anti-servo and servo tabs, spring tabs. Assist pilot in moving the controls and fly hands off.
Auxiliary flight controls
flaps, slats, slots, speed-brakes.
what is a spring tab?
it is an auxiliary control designed to aid the movement of a primary control at high speeds
what is a balance trim tab
auxiliary control designed to assist in moving the control surfaces. on same side as the horn on the tab.
4 most common high lift devices
leading and trailing flaps, slats, slots.
tools used to check control surface travel
universal propeller protractor or special control surface protractor.
3 mechanical methods by which flight control systems may be actuated.
cables, push-pull rods, torque tubes.
what information is required before a cable rigging chart can be used
ambient temperature and the cable size
what is the difference between the tools required to pull a CherryLOCK rivet and a CherryMAX rivet?
a cherrylock rivet needs a separate tool for each individual size.
Describe the process for determining the total length of a solid rivet for a particular installation.
add the grip length plus 1 1/12 times the rivet diameter.
what minimum edge distance and spacing should be used for a single row of protruding head rivets?
not less than two rivet diameters from the edge and not less than three rivet diameters apart.
what factors must be considered in order to determine set back?
the thickness of the metal and the bend radius.
name at least four different types of defects found in wood.
knots, checks, splits, decay, dry rot.
what are the three types of glues used in modern aircraft construction and repair?
resorcinol glue, phenol-formaldehyde glue, and epoxy resin glue.
in what areas are splices to a wood spar prohibited?
under an attachment fitting for the wing root, landing gear, engine-mount, lift, or inter-plane strut.
what are the two primary uses for plywood in aircraft construction?
gusset plates and aircraft skin.
provide examples of at least three types of plywood skin repairs.
splayed patches, surface patches, plug patches, and scarfed patches.
what type of patch should be used to repair small holes in thin plywood skin if the skin is less than 1/10th inch thick?
a splayed patch if the hole can be cleared out to a 15th thickness of the skin.
what should be done to prevent a plywood patch and the pressure plate from sticking together if glue is extruded from the join?
place a piece of waxed paper or vinyl plastic between the patch and the pressure plate.
what re the most common causes for delamitation of a composite structure?
sonic vibration, expansion of internal moisture, liquid leakage, and a manufacturing error.
name some of the factors that cause crazing in transparent plastic windows and windshields?
ultraviolet light, stress, solvents, and improper handling
how should a hole be drilled in plexiglas to avoid damage to the hole when the drill breaks through to the underside?
back up the plastic with a piece of wood and feed the drill slowly.
what is the purpose of shielding an arc weld with an inert gas?
the gas prevents atmospheric oxygen and nitrogen from contaminating the weld.
what is the purpose of flux used with brazing and silver soldering?
the flux cleans the base metal by removing any oxide film.
how are the fabric type and strength requirements determined for fabric-covered aircraft?
the original manufacturer determines the fabric type, and the strength requirements are a function of the never-exceed speed and wing loading.
what types of synthetic fibers are used for covering aircraft?
fiberglass and heat-shrinkable polyester fibers.
what is the function or purpose of reinforcing tape?
reinforcing tape is used between the fabric and the rib stitching to preventing the lacing cord from cutting through the fabric.
where would you use surface tape?
over rip 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.
what are the principle methods used to test the condition of fabric?
punch testers such as the maule or seybolt tester, and laboratory pull-testing.
