Landing Gear Flashcards
Why does an aircraft need undercarriage?
- Support aircraft on ground
- Allow aircraft to taxi maneuver on ground
- Allow aircraft to take off and land
What requirements must the undercarriage perform?
- Tall enough to provide ground clearance for propeller.
- Strong enough to accept mediocre landings.
- Easy to maintain.
what type of gear the Aircraft C of G must be well behind the main gear position.
Conventional “tail dragger”
Advantages of Tricycle Gear
- Less risk of nosing over
- Less tendency to ground loop
- Improved visibility for ground maneuvering
- Level attitude for loading and unloading
Disadvantage of Tricycle Gear
- More weight
- More drag
- Not suited for rough use
Aircraft gear allows for landing on both water or land.
Amphibious , amphibious floats
Characteristics fixed gear
-Fixed gear is simple in construction, lower cost
The lower number of components leads to lighter weight
-Can be manufactured to be very strong
-Creates much more drag than retractable gear
Wheel fairings, or “pants,” can be used to
reduce fixed gear drag.
Characteristics of Retractable Gear
- Higher cost of construction and more complex
- Heavier over-all weight with the retraction system
- Reduces form drag greatly
- Used on most modern aircraft and almost all high- -speed aircraft
All landing gear systems must have some capability to absorb landing forces and reduce shock to the airframe. Some of the methods utilized to do this are:
- Tires and solid or “rigid” gear
- Rubber bungee cords
- Rubber compression disks
- Steel spring gear
- Composite spring gear
- Shock strut [oleo]
ATA Landing Gear
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