AGK Systems - Aircraft Construction Flashcards
What is riveting?
Most common method for attaching metallic structures. Permanent mechanical fastener.
Have a long end to go into the metal, have a flushed head to seal at the hole.
What is welding?
High current through welding rod to create heat. fuses materials together to create a permanent bond.
What is bolting?
Joining two or more bolts together using bolts, which are threaded fasteners. Secures parts like panels and brackets.
Strong, reliable connection.
What is pinning?
Using straight or tapered fasteners to attach one structure to another.
What are adhesives?
Can be used to join structures.
Pressure and heat applied to the adhesive to ensure a firm and stable bond.
Commonly used in conjunction with rivets.
What is the monocoque?
Series of aluminium frames joined by longerons. metal skins is attached then to whole assembly . No internal framework or truss. More efficient.
What is the semi-monocoque?
Pre dominate in modern aircraft.
Skin - provides aerodynamic shape and carries some of the load.
Formers/frames - define the shape
Stringers - Run longitudinally and help withstand buckling
Longerons - main longitudinal load carrying members, prevent twisting.
Bulkheads - provide structural partitions inside the fuselage.
Firewall - a fire resistant bulkhead.
What is a machined or integral structure?
Single machined piece of aluminium forms skin and stringer-like structure.
No need for rivets, lighter.
What is the pressure hull?
section of fuselage between fwd and aft bulkheads.
Pressurised between 8-9psi.
Wing design.
Three types of wing: cantilever wing, semi-cantilever wing and externally braced wing.
A cantilever is a beam that is supported only at one end, The structure carries all load internally.
A semi-cantilever wing has some external struts.
Struts create lots of drag.
What is a wing spar?
Main spanwise wise structural member of the wing.
Withstands bending loads and supports weight of wing on ground.
What are wing ribs?
Provides aerodynamic shape.
Allow the stressed skin to be attached to the wing structure and transfer the loads into the spar.
What are stringers?
Combine with ribs to share loads and transfer loads to spar.
What is stressed skin?
provides smooth and aerodynamic outer cover and withstands tension and compression stresses.
What is a torsion box?
With multiple spar designs the spars are linked together to form a torsion box and ribs and skin.
Torsion box very rigid, resistant to twisting and adds to wing strength.
