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19 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Which species of wood is considered to be the standard when comparing other woods for use in aircraft structure
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Sitka spruce
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Stan live here
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What is a basic difference between plywood and laminated wood
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The grain in each layer of laminated wood runs in the same direction. the grain in the layers of plywood runs at 90 degrees or 45 degrees each other
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the grains
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What kind of glue is recommended for making a repair to a wooden aircraft structures
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Synthetic resin glue
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How is aircraft plywood prepared for making a compound bend
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The wood is soaked in hot water until it is pliable
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How is pressure applied to the glued joint with splicing a wooden aircraft wing spar
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With cabinetmakers parallel clamps
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How much pressure must be applied to a glue joint in a piece of soft wood produces a strong joint
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125 to 150 pounds per square inch
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What is the correct repair to a wooden aircraft wing spar at the wing attached bolt holes in the spars are elongated
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Slice in a new section of the spar and drill new holes
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What kind of repair is recommended for a hole in the plywood skin of an aircraft wing
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A scarf patch
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What is the recommended taper for a splayed patch in a plywood aircraft skin
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5 to 1
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What is the recommended taper for a scarf patch in a plywood aircraft skin
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12 to 1
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Why should sandpaper never be used when preparing a scarf joint in the wing spar for slicing
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The dust cause by sanding will plug the pores of the woods or the glue can not get in to form a good bond
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What is the largest hole in a plywood wing skin that can be repaired with a fabric patch
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1 inch in diameter
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Why are light steel bushing often used in bolt holes in a wooden wing spar
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The bushing keep the spar from being crushed when the nut on the attachment bolt is tightened
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How long should a glue joint be kept under pressure when slicing a wooden aircraft wing spar
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For at least seven hours
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Are minerals streaks in a piece of structural aircraft wooden reason for rejecting the wood
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No if there is no evidence of decay in the wood
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Which area of a wooden aircraft wing spar must not contain any spices
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There must be no splice under wing-attached fittings, landing gear fittings, engine mount fittings, or lift and interplane strut fittings
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How is compression wood identified
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IT HAS A HIGH SPECIFIC GRAVITY , it appears to have an excessive growth of Summer wood, and little contrast between the Springwood Summerwood
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What is done to a splice in a wooden aircraft wing spar to strengthen the splice
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Reinforcing plates are glued to both sides of the splice
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Why must abrupt changes in the cross-sectional area of a wooden structural member be avoided
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cause stresses and can cause failure
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