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14 Cards in this Set
- Front
- Back
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A faint line running arcoss the grain of wood spar generally indicates?
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Compression failure.
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Pin knot clusters are permitted in wood aircraft structure provided?
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They produce a small effect on grain direction.
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In case of elongated bolt holes in a wood spar or cracks in the vicinity of bolt holes?
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A new section of spar should be spliced in or the spar replaced entirely.
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Where is information found concerning acceptable species substitutions for wood materials used in aircraft repair?
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Ac 43.13-1B
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Which statement about wood decay is correct?
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Decay is not acceptabe in any form or amount.
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Laminated wood spars may be substituted for solid rectangular wood spars?
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If the same quality wood is used in both.
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Glue deterioration in wood aircraft structures is indicated?
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When a joint has separated and the glue surface shows only the imprint of the wood with no wood fibers clinging to the glue.
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The I-beam wooden spar is routed to?
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Reduce weight.
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When patching a plywood skin, abrupt changes in cross-sectional areas which will develop dangerous stress concentration should be avoided by using?
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Circular or elliptical patches.
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Laminated wood is some times used in the constructuction of highly stressed aircraft components. This wood can be identified by its?
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Parallel grain construction.
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Which of the following conditions will determine acceptance of wood with mineral streaks?
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Careful inspection fails to reveal any decay.
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The strength of a well-designed and properly prepared wood splice joint is provided by the?
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Glue.
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The cantilever wing uses?
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No external bracing.
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Compression failures in wood aircraft structures are characterized by buckling of the fibers that appear as streaks on the surface?
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at right angles to the grain.
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