11.3 Flashcards
(51 cards)
Whats the two truss type constructions ?
Pratt truss
Warren truss
Whats the difference between Pratt and warren truss ?
- Pratt truss have wire type diagonal members rather than rigid tubes which warren truss have.
What carry’s the load in a monocoque fuselage ?
The skin,
- skin has its strength from being thicker and not by the application of other supports.
Whats the two types of doors ?
Plug type
Non-plug type
Describe a plug type door ?
-Seals itself keeping a pressure difference on its two sides ( inside and outside )
-The higher pressure forces door into wedge-shaped door into the frame establishing a seal and preventing it from. Being opened until pressure is released.
Describe non-plug type door ?
-designed to be opened inwards which isn’t suitable for cargo doors as there is not enough space for the door to swing inside.
What does a door structure consist of ?
Frame
Beams
Formers
Intercostals
Whats does door seals stop ?
Pressure leak
Light transmission
Noice transmission
Thermal transmission
Aerodynamic smoothness
What are door seals held in place by ?
Adhesive compounds, screws
Whats the 4 seal types ?
Bulb type
Diaphragm seals
Flap-type seals
Multiform seals
Why must cockpit door be lovable and made from reinforced construction ?
-Access is only possible if it is opened normally
-resistant to penetration or intrusion
Whats the 3 things a cockpit door can be made from?
Gas’s reinforced polymers
Kevlar
Laminates of high-strength glass fibre
Whats the flight deck door construction ?
-Lower part - decompression / evacuation flap
-Above door ( cabinet side ) - decompression flap
-spyhole
( incase flight deck is depressurised, cockpit door opens. )
What type of door is most emergency exit hatches ?
Plug-type door
( can be opened from inside and outside )
What must the ground operator ensure before opening cabin door ?
That the “CABIN PRESSURE” indicator / light is not lit red.
What can be used to prevent the movement of the actuators holding the cargo door ?
Safety gags
What must an engineer ensure when working with the emergency exit slide ?
That a pin is inserted into the armed / disarmed leaver to minimise accidental nudge and setting off the slide.
Whats a counterbalance spring operational purpose on a bulk cargo door ?
Takes the weight from the door incase of the door failure.
Whats the layers of a passenger window ?
1 Doubler
2 Aircraft skin
3 Doubler
4 Window frame
5 Outer plane
6 Inner seal
7 Inner plane
Whats passenger plug type passenger windows made from ?
Acrylic plastic
How is the window frame fastened to the aircraft skin ?
Riveted
How are cabin windows installed to the window frame ?
Sealed from the inner side
Whats the use of the small vent hole in an aircraft’s window ?
Ensures that the pressure between the panes is the same as the cabin pressure
What’s the two forward windows in a cockpit known as ?
Windscreen
