The Landing Gear Flashcards
Advantages of a tricycle gear
Better directional stability (CG further forward)
Less likely to nose over
Less drag improves takeoff performance.
Most common types of fixed landing gear
Spring Steel Leg / Cantilever
Rubber cord or bungee
Oleo Pneumatic Struts
Purpose of torque/torsion link
Stops plunger/sliding tube from rotating inside leg/body
Bogie Definition
Have at least for wheels per landing gear leg
Main disadvantage of bogie
When turning, crabbing will occur due to large footprint.
What acts as a damper (whole system)
The oil and nitrogen
What acts as a spring?
The gas acts as a spring to absorb the loads.
What acts as a damper?
The oil acts to dampen the spring action
Most likely cause of the fescalised portion of the leg being too small is:
Insufficient N2 pressure
Consequence of insufficient nitrogen gas in oleo strut?
Bottoming-out on landing
Ramifications of insufficient oil
Gear rebound is not properly damped
Purpose of mechanical lock?
Prevents creep.
Break Bars
Torque limiting devices that limits force through brakes, then through the wheels.
Nose Wheel Requirements
Free Castoring, to allow differential braking
Automatic self centering to ensure nosewheel is centered prior to retraction.
Shimmy Protection
Which additional load may nosewheel steering cause on the landing gear?
Towing - Shear