Which engines does Ryanair fly?
26 airbus A320 (lauda)
411 B737 NG
206 B737 MAX gamechanger
300 B737 max10 (order)
total over 600 boeing 737 aircraft
Difference Boeing 737-800 and B737 max 8 gamechanger
- 4% more guests (197 passengers instead of 189)
- 16% less fuel
- 40% less noise emissions
- bigger screens in cockpit
Engines B737-800 and B737 Max 8
737-800: CFM56-7B
737-8 MAX: CFM LEAP-1B - LEAP = leading Edge Aviation Propulsion
CFM = joint venture GE aerospace and Safran Aircraft Engines. Both around 27k pounds of thrust
Bypass ratio B737-800 and 737-Max8
5,5 : 1 and 9 : 1
Why the winglets on the engine CFM-LEAP 1 B
to reduce drag, improve airflow, increase lift. The engines are also placed higher and further forward
Tell me about the B737 Max 10
150 orders, 150 options, delivery is delayed, 228 seats. same engines as B737 max 8 (CFM-LEAP-1B)
Tell me about the electrical system of the B737
4 sources:
- 2x engine generators
- 1x APU generator
- ground power
- 2x Battery (for emergencies)
Generators provide 3 phase, 400 hertz and 115 volts of AC power.
No AC parallel sourcing
2x AC transfer busses, which can be supplied by engine generator or APU generator
IDG = intergrated Drive Generator = inside each engine and provides power
the bigger systems run on AC power, while some smaller system work on DC power.
from AC to DC = Transformer Rectifier Unit
DC to AC = invertor
What is CFIT?
Controlled Flight Into Terrain -> means that the aircraft is working perfectly, but due to not having good situational awareness, pilots fly the aircraft into an obstacle, terrain, sea etc.
Explain RVR
Runway Visual Range –> is the visibility in meters on the runway, is mentioned in the metar if the visibility drops below 1,600 meter or when the RVR is 1,800 meter or less
Where does CAVOK stand for
Ceiling And Visibility OK
Which items on hydraulic A en B
A: - landing gear
- primary flight controls (rudder, ailerons, elevator)
- nose wheel steering
- thrust reversers A
- some of the spoilers
- left reverser
B:
- flaps and slats
- primary flight controls (rudder, ailerons and elevator)
- normal brakes
- right reverser
Explain LGTU
Landing Gear Transfer Unit = when hydraulic system A fails, and you want to raise (not lower) the landing gear, LGTU takes hydraulic power from system B to raise the gear. It only works when A fails
What is a CSD
Constant Speed Drive -> there to transform the power generated by the engines (IDG), to a stable AC current. (115 volt, 3 phase and 400 hertz)
What is MCAS? What does it do?
Maneuvering Characteristics Augmentation System –> is bases on the angle of attack and is designed to pitch down if there is a stall incoming. After 2 crashes (lion air and ethiopian airlines), the system needed changes
Explain coriolis effect
on the northern hemisphere, the earth rotate to the left. the rotation is faster at the equator. therefore, the curveture of clouds etc is to the right.
DALR and SALR
dry adiabatic lapse rate: 3 degrees per 1,000 ft
saturated (wet) adiabatic lapse rate: 2 degrees per 1,000 ft
Cold and warm fronts
Cold front: pushes like a bulldozer from below the warm and moist air up. this causes the warm air to rise an being unstable with cumulus clouds, rain showers etc.
warm front: moves gradually over a cold front, which makes the air stable. drizzle can occur.
ECU and FADEC?
engine control unit, which manages the Full authority Digital engine system. which manages the fuel flow, propeller pitch etc
