Airframe Design And Materials Flashcards
What are static loads?
Loads on the ground (weight & gravity)
What are dynamic loads?
Forces in flight - due to manoeuvres and atmospheric conditions
Where on the wing is the greatest stress carried?
Wing roots
What is corrosion?
Weakens a structure and stress fractures can form
Which two environments pose the greatest threat of corrosion?
Marine and humid
What causes fatigue?
- High number of cycles
- Hard manoeuvring
- Low maintenance
What is hard time maintenance?
- Happens at fixed intervals (A and D checks)
- Financially beneficial for airlines
What is on condition maintenance?
- As and when needed
- Brakes, tyres, wipers, lights
What is a composite structure?
Combination of two or more materials
Features of composites
- Light
- Stiff and resistant to fatigue/corrosion
- Expensive to repair
Max structural ramp mass
Max permissible mass before A/C taxis
Max structural T/O mass
Max permissible mass at the start of T/O run
Max zero fuel mass
Max mass of A/C without usable fuel
Max structural landing mass
Max mass on landing