Technical Aircraft Systems Questions Flashcards
What is the max takeoff / landing weight of your current aircraft?
Airbus
A320: 169,755 lbs (77,000 kg) / 145,505 lbs (66,000 kg)
What is the max flap extension altitude for your current plane?
20,000 FT
What are Flight Control Laws?
Fly By Wire aircraft are protected by “Laws”. Electronically controlled and hydraulically activated protections that uses a pre-set of limitations
The Laws are Normal Law, Alternate Law (1 & 2), Direct Law, Mechanical Backup Law
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What is the maximum pitch up angle when you pull back / push down the side stick?
30 deg (config 0-3) then 20 (config full) / 15 deg
Tell me about the fuel system on the A320? (Auto and Manual modes)
Total: ?
Outer: ?
Inner: ?
Center: ?
Minimum Take Off Fuel: ?
5 tanks. 2 outer, 2 inner, one center. The inner tanks have pumps and gravity feeding. The center only has pumps. The outer tank only has a transfer valve. When doing auto refuel, flows from into center and wing tank simultaneously, if manual refuelling, the flow goes into the wing tanks then center tank.
Total: 41,814lbs
Outer: 1500lbs (x2)
Inner: 12270lbs (x2)
Center: 14274lbs
Minimum Take Off Fuel: 3,307lbs
When does your anti-icing equipment turn on after takeoff?
Engine anti ice remains on even on the ground, wing anti ice turns on on the ground for a 30 second check then is on after take off when pneumatic supply is available
What is the difference between a high bypass turbine engine and a jet engine?
What type of engine uses a Turbofan? Example of a Jet engined aircraft?
Jet Engine:
1. Suck (intake & compressor) - compressor spinning, sucks in air, compressing the air
2. Squeeze (combustion chamber) - hot pressurized air, mixed with fuel and burned
3. Bang (turbine) - expanding air passes through the turbine
4. Blow (exhaust nozzle) - releases a force to push the aircraft forward
Turbofan
1. Works just like a Jet Engine
2. Has an extra fan, High Pressure Compressor, a Low Pressure Turbine
3. Now has 2 channels where air passes through:
A. Inner Channel (Core): air going into the actual engine (like a Jet Engine)
B. Outer Channel (Bypass): air passing outside the Core and the Engine Casing
4. High Bypass Ratio: the ratio between the amount of air passing through the Core and Bypass
A. The higher the Bypass Ratio, the better
B. The bypassed air helps to cool the core
C. Over 80% of the thrust in a Turbo Fan is from the Bypass
Benefits of a High Bypass turbine Engine vs Jet Engine:
A Turbofan is quieter than a Jet Engine, more fuel efficient, thrust via Bypass section (less exhaust)
What type of engine uses a Turbofan?
Airbus A320
Example of a Jet engined aircraft?
SR71
What is the definition of aspect ratio?
In aeronautics, the aspect ratio of a wing is the ratio of its span to its chord. It is equal to the wingspan divided by the wing area. Example: 20:1 or 20/1.
What is a critical engine?
A Critical Engine is that engine when the aircraft has an engine failure, will is suffer more adverse effect compared to the other engine failing.
Affects only multi engine, propeller aircraft. If the turn of the propeller is clockwise, the right engine
P Factor. The left engine with a clockwise rotating propellor is the critical engine. Aircraft will yawn the left.
Opposite rotating propellor aircraft, Turbojet, Turbofan engines don’t have a critical engine.
Theoretically, how does an aircraft fly inverted?
They can fly upside down because of the shape of the wing. Aerobatic planes are curved on both sides.
Thrust remains the same, pitch is opposite.
The PFD shows the blue sky below and ground above. To climb, pitch down, add power. To descend, reduce power and pitch up.
How does an airplane fly?
4 forces of flight
1. Thrust - comes from the propeller or engine
2. Lift - what keeps the aircraft in the air
3. Drag - slows the airplane down
4. Weight - acting in the opposite direction of lift
Why do airplanes fly:
To take off: lift and thrust forces are greater than drag and weight
In unaccelerated, straight and level flight, all forces are equal
