Wood Structures Flashcards
Pin knot clusters are permitted in wood aircraft structure provided…
they produce a small effect on grain direction
Where is information found concerning acceptable species substitutions for wood materials used in aircraft repair?
AC. 43-13-1B
The I-beam wooden spar is routed to…?
reduce weight.
Which of the following conditions will determine acceptance of wood with mineral streaks?
Careful inspection fails to reveal any decay.
The strength of a well-designed and properly prepared wood splice joint is provided by the…?
glue.
Laminated wood spars may be substituted for solid rectangular wood spars…
if the same quality of wood is use in both.
Any wooden member that has been overstressed is subject to which type of failure?
Compression failure.
Any wooden member that has been overstressed is subject to which type of failure?
Circular or elliptical patches.
Compression failures in wood aircraft structures are characterized by buckling of the fibers that appear as streaks on the surface ______________________________________________________?
at right angles to the grain.
The cantilever wing uses…?
No external bracing.
Which statement about wood decay is correct?
Decay is not acceptable in any form or amount.
Glue deterioration in wood aircraft structure is indicated__________________________________.
when a joint has separated and the glue surface shows only the imprint of the wood with no fibers clinging to the glue.
In cases of elongated boltholes in a wood spar or cracks in the vicinity of boltholes,
a new section of spar should be spliced in or the spar replaced entirely.
A faint line running across the grain of a wood spar generally indicates…?
Compression failure.
Laminated wood is sometimes used in the construction of highly stressed aircraft components. This wood can be identified by its…?
parallel grain construction.
