6.3 Flashcards
What are the main construction units in wooden aircraft
Spars (forward and Aft)
What wires resist forces to not allow the wing bending?
Drag and anti drag wires
Drag for flight
Anti for landing
What is the opposite of inboard and ledge?
Outboard
Trail edge
What grain ratio is most woods (deviation of the grain)
1 : 15
What saw method do we use in the aircraft industry?
Quartersawn
What is a lengthwise separation of wood caused by disruption of wood fibres?
And what causes it?
Splits
Poor drying processes
What is a crack in the wood that runs across the annual rings?
Checks
What is a crack or separation of the board when two annual rings separate the boundary?
Shakes
If a piece of wood has a split, check or shake what can’t it be used for?
Aircraft construction or repair
What is one of the most common types of glue used for wooden aircraft structures?
Resorcinol Glue
What 2 part synthetic resin glue penetrate evenly into structures?
Epoxy Resin
What are the most common type of box spars
Box, I, C, Plain Rectangular and routed box spars
In a scarf repair what is the angle/taper ratio for cutting?
1:10 to 1:12
Splayed patch repair uses a section (cone) taken out at what ratio?
5:1
What condition do you want fabric on aircraft in?
Torte (stretched)
What is the selvage on fabric
And what do you need to do to it
Tight edge on fabric to stop it unraveling
Cut it off before fabric is used
What is the warp of the fabric?
The length as it comes off the roll
All components that are covered have to be regularly inspected what are some examples?
Mice, rats, insects and nests
Broken or missing rib stringing
Fabric tears and stone damage
