wood, fabric, FG 2
Explain the term Bias
A cut or fold, or seam made diagonally to the warp or fill threads
Apply to rib...
Anti-chafe tape
Which 14CFR part 43 Appendix states major and minor repairs?
Appendix A
Kevalr is Dupont trademark for what fiber?
Aramid
Most honeycomb materials are _______ that its properties are directional
Arisotropic
What additive increase flexibility and life?
rejuvenator
where is reinforcement tape used?
rib caps
Honeycomb sandwich structure are offend prepared with ______?
scarf type bonded material
Scarf type repair use ______ scarf angle to ease the load into the repair
small
What is not a FAA approved method?
the mechanical fabric test method
Prior to covering the structure must be primed. T or F
true
T or F. The same material and technique must be used when replacing fabric
true
What type of inspection is the primary method for in service inspection?
visible
What are 2 types of glue used on aircraft wood structures?
Casein and Synthetic resins
When patching a plywood skin, abrupt changes in cross sectional areas which will develop dangerous stress concentration should be avoided by using
Circular and elliptical patches
Which statement about wood decay is correct?
Decay is not acceptable in any form
What condition can effect the signal of the radar
Entrapped water
T or F the same thread may be used to hand seam and machine seam fabric.
False
T or F. Fabric test strips should have all coating left on
False
T or F. Warp describes the direction across the width of the fabric
False
What is an individual fiber called?
Filament
What type coat is applied protect from UV light?
Fillers
Which fabric isnt available anymore?
Grade A Cotton
What do the structural properties, stiffness, dimensional stability, and strength of the composite laminate depends on?
The stack sequence of the plies
Pin knots clusters are permitted in wood structure provided
They produce a small effect in grain direction
T or F. Fabric cement is used to attach the fabric to the airframe
True
T or F. Fabric is still airworthy down to 70% of the breaking strength of new fabric
True
T or F. Only companies with a PMA may manufacture or sell aviation fabric
True
What are ceramic composites used for on aircraft?
Turbine blades
What is the key ingredient to poly-fiber covering system ?
Vinyl
Compression failure in wood aircraft structures are characterized by buckling of the fibers that appear as streaks on the surface
at right angles to the grain
Major fabric repairs inspected by who?
An A&P with an IA
A faint line running across the grain of a wood spar generally indicates?
Compression failure
How much does polyester fiber shrink at 350 degrees?
10%
How many blankets does it take to cover a wing?
2
What is a typical storage life for prepreg materials
6 to 12 months
What is fiber to resin ratio?
60:40
How is aircraft wood different from laminated wood?
Laminated wood is stronger
What is the role of the matrix component in the composite material?
Matrix supports fibers and bond them together
What is considered to be a permanent repair?
Meet the strength and durability requirements
What is PMA
Part manufacture approval
What affects does moisture/humidity have on wood?
Smells, discoloration, decay, fungus
Which fabric covering system is non hazardous?
Stuart
t or f. a TSO is a technical standard order issues by the manufacture
false
What is used to improve the plie strength of the cold bond assemble
film adhesive
Any protrusion in fabric covering are reinforced with ?
gussets
What shape are honeycomb core cells?
hexagon
