Aircraft Materials; Wooden Structures and Fabric Covering Review Questions with Complete Solutions Graded A+
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Course
Aircraft Materials
Institution
Aircraft Materials
Aircraft Materials; Wooden Structures and Fabric Covering Review Questions with Complete Solutions Graded A+
bonded joints - Answers With what would you check the bonded joints of a wooden aircraft structure? A feeler gauge.
open assembly time - Answers What is an open assembly time? The time bet...
Aircraft Materials; Wooden Structures and Fabric Covering Review Questions with Complete Solutions
Graded A+
bonded joints - Answers With what would you check the bonded joints of a wooden aircraft structure? A
feeler gauge.
open assembly time - Answers What is an open assembly time? The time between the adhesive being
applied to the joint surfaces and their assembly.
defects not allowed - Answers The defects not allowed at all on wooden structures are checks, shakes
and splits.
basic structure of wood - Answers The basic structure of an aircraft made of wood can be non-
monocoque, monocoque, semi-monocoque.
full inspection for corrosion - Answers When a full inspection for corrosion is to be carried out on a
wooden aircraft you would remove all the fabric/cloth prior to inspection.
moisture content for wood decay - Answers For fungus to cause wood decay in a wood structure, the
moisture content in the wood must be at least 20%.
normal moisture content - Answers The normal moisture content in the wood of a wooden aircraft
structure is 10-12%.
determining moisture content - Answers How is the moisture content within the wood of a wood
aircraft structure determined? By inserting the probe of a moisture meter.
splicing a wooden spar - Answers Except where specified by the manufacturer, a wooden spar may be
spliced at any point except under the wing attachment fittings.
replacement of a wooden spar - Answers Replacement of a wooden spar is a major repair.
crack in a wooden spar - Answers A crack is found in a wooden spar, you might be able to repair the
spar.
wood sealants - Answers Wood sealants used on wooden aircraft structures are for helping to prevent
wood cracking.
compound curvature - Answers To determine whether an aircraft wooden structure surface is
compound curvature, you would use a sheet of paper.
bending plywood - Answers To assist the bending of plywood, a heated bending former must be heated
to a temperature of 150 °C.
splayed patch repair - Answers A splayed patch repair may be used on plywood damage which does not
exceed 15 times the skin thickness.
, surface patch size - Answers A surface patch to a plywood structure may be as large as 50 inch
perimeter.
scarfed plywood repair slope - Answers The steepest slope permitted on the scarf of a scarfed plywood
repair is 1 in 12.
maximum size damage for fabric patch - Answers The maximum size damage to plywood skin that may
be repaired with a fabric patch is 1.0 inch diameter.
doubler for scarfed patch - Answers The doubler used to support a scarfed patch plywood repair should
be made from plywood of a minimum 1/4 inch thick.
surface finishing of wooden structure - Answers An aircraft wooden structure must be surface finished
and sealed on both the outer and inner surfaces.
pine wood strength - Answers Pine wood has a strength, compared to that of spruce, less than.
standard wood type - Answers The standard wood type for aircraft wood structures is spruce.
hard knots in wood - Answers Hard knots in wood are acceptable in certain locations.
shake in wood - Answers A 'shake' in a piece of wood is a crack across annual rings.
Wood with checks, shakes or splits - Answers must be rejected.
Compression wood - Answers should be rejected.
Red heart and purple heart - Answers are forms of decay in wood.
The greatest amount of shrinkage in wood - Answers is in the Tangential direction.
Shrinkage of wood - Answers is least along the fibres.
The maximum permissible grain deviation in wood - Answers is 1:15.
Nails used on wood structures - Answers should be 25 mm apart.
Small hard-knots in a wooden spar - Answers are allowed in the middle 1/3 portion.
Corrosion on metal fasteners in wood structure - Answers can indicate decay of the adjoining wood
structure.
Bolt holes through wooden structures - Answers should be sealed, and the sealant allowed to dry before
fitting the bolt.
Wood end-grain - Answers is more susceptible to moisture ingress as the side of the grain.
Elongated boltholes in a wood spar - Answers a new section of spar should be spliced in or the spar
entirely replaced.
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