Chp1 Airframes Flashcards
Name as many parts of an aircraft as possible
Fuselage, Wing leading edge, Wing trailng edge, Fin, Tailplane, Elevator, Rudder, Wing root, Flaps, Aileron, Wing tip, Main plane, Engine nacelle
Name a type of ground load exerted on an aircraft
weight, friction, reverse, braking, taxing, takeoff/landing, towing, hoisting cargo
Name a type of flight load exerted on an aircraft
weight, aerodynamic forces, thrust, pressurisation
Name the two abnormal loads that an aircraft could experience
Asymmetric flight
Landing on nose gear
What is the primary structure of an aircraft
The pars designed to withstand the largest stresses and if it fails, the integrity of the aircraft can be comprimised and suffer a catastrophic failure
What is the function of the secondary structure?
Also designed to withstand stress but less amounts
If catastrophic failure occurs then it could result in limitations to the operation
In the EASA environment what certain specifications are defined by competent authorities for the design/manufacture operation?
CS-25 = large aeroplanes
CS-23 = light aeroplanes
What is a CS comprimised of?
Design, material quality, build quality ect…
What does AMC stand for?
Acceptable means of compliance
What is the GM?
Guidance Material whichh is extra tips on how to follow the CS
What are the three types of loads?
Static
Dynamic
Cyclic
What is static load?
When a force is continually applied and does not change
The aircraft will be in steady level flight
What is dynamic load?
When a force continuously changes over time
When there is a change in lift due to turbulence
What is cyclic load?
When a force is continually applied and removed, reduced or reversed
When the aircraft cabin is pressurised or the load exerted on the undercarridge during landing or takeoff
What are the different ways a load can be applied?
Tension
Compression
Bending
Shear
Torsion
Or a combination
Define stress
An internal force per unit of area that occurs as a result of external loads
Define strain
The ratio of the change in length against the original length
What is the difference between elastic and plastic deformation
Elastic deformation is one that is seen when a load is applied then it reverts back to its orginal state compared to Plastic deformation which is permanent
What is corrosion
The break down of metal through a chemical or electrochemical attack, it occurs when there are conditions to provide electrolytes
What is surface corrosion
When the cross sectional thickness of the material is reduced
It can be seen as etching or pitting in the material
what happens in the corrosion between materials
It occurs when two dissimilar metals are in contact, fueled by the presence of an electrolyte. It can penetrate the core of the metal along grin boundaries.
It can also be accelerated by stress
What environments is corrosion most lkely to occur
When there is a high presence of salt, pollutants or chemicals and high humidity
eg. marine, tropical or industrial environments
what are some signs or corrosion
discolouration
flaking
cracks
powdering
rust ect…
What are some materials carried on aircraft that could accelerate corrosion?
Battery acid
Water
Toilet wastewater
Hydraulic fluids when mixed with water
