Fichas
1.2. Airframes
Fichas del conjunto (39)
- 1what is the datum point for fuselage stationsthe nose, side view
- 2what is the reference for buttock linesbrids eye view
nose to tail middle - 3define the wingthe component that is responsible for creating the force that lifts the aircraft, counteracting
- 4define a bi-planewing that has a double mainplane, supported by flying wires, struts and landing wires
- 5define braced monoplaneused on small slow speed aircraft
large drag
provides stiffness without weight penalties - 6define a cantilever wingwing recessed onto fuselage
less drag
attached to bottom of the fuselage - 7what are the basic components of a wingspars, stringers, ribs,skin
- 8define a sparmain components resisting bending and shear loads
usually 2 or 3 - 9what load does the front spar resistbending backwards
- 10what is the purpose of the main sparmain structural element
- 11what is the purpose of the rear sparsupports the control surfaces as they transmit loads to the wing
- 12what is the main function of the wing skinupports bending and shear loads
distribute pressure equally across the wing - 13what is the main purpose of the ribs in a wingshape the wing - responsible for aerodynamic characteristics
transmit loads across the chord to the main spar
supports the skin and stringers - 14define the main purpose of the stringersavoid buckling and compression loads
- 15define a torsion boxstructure formed between spars, skin and ribs
- 16what loads does the torsion box resistbending and twisting loads
- 17what components does the wing need to supportlanding gear
engines
control surfaces - 18where is the wing usually attachedto the main spar
- 19where will u usually find the fuel tanksin the spare wing space
- 20on smaller aircraft how can we reduce wtv at the same time as providing a space for fuelusing winglets
- 21what does the appearance of wing tanks in the wing help aerodynamic wiseit can eliviate the bending stresses
therefore the fuel i the tanks is the last to be used - 22define basic empty massaircraft mass plus standard items
lightest it can ever be - 23define variable loadcrew and baggade, food and beverage, catering ect
ac ready for a flight NO FUEL OR PASSENGERS/CARGO - 24define Traffic Loadtotal mass of passengers ect including non revenue load (maintenance items)
- 25fuel, block fuel or ramp fuelfull fuel load put into the aircraft for a given trip
can take it above its maximum take off mass - 26what are the different aeroelastic phenomenadivergence
control reversibility
flutter - 27define divergencewing twists, leading to a change in angle of attack.
it only occurs above a certain airspeed - 28define control reversibilityforce created by deflection of the control surfaces. it may cause the opposite effect of the desired motion
it only occurs above a certain airspeed - 29what is the most common example of control reversibilityaileron reversal
- 30define flutterdynamic effect involving oscillations
- 31how does flutter arisecoupling between the bending and twisting loads of the wing
- 32what can all the aeroelastic effects causestructural failure
- 33how can u eliminate this phenomenon in low speed flights- increasing torsional stiffness
- installing the wing components ahead of bending axis
- place the centre of gravity ahead of the bending axis - 34what are the different components of the wingribs
spars
stringers
skin - 35what does the safe life refer toworks on the idea that you have a certain number of cycles before a component is deemed unsafe, this is then divided by a safety factor and then after that many cycles it is replaced by a new one
- 36what does fail safe refer toredundancy
the airframe is fitted with excess components than it needs, so that if some fail, it is still safe to operate.
routine inspections are then carried out and if any component is flawed it will be replaced. - 37what does damage tolerant refer toinvolves making a component thicker and stronger than it has to be so that it still has the physical strength if it was to suffer damage
- 38define hard time maintenanceinspection and service intervals occur during a specified number of take off/landings/ flying hours
- 39define on condition maintenancerefers to maintenance being carried out only when necessary.
commercial aircraft are fitted with numerous sensors, when one condition is exceed the part will be inspected then repaired or replaced if necessary
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- Descripción
- (Systems) AGK Fichas sobre 1.2. Airframes, creado por Ella Davies el 27/03/2018.
- Creado por
- Ella Davies · mar 2018
- Actualizado
- 27 mar 2018
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