the.com/landinggear
the only part of a plane designed to be hit by Earth at speed
means The wheels, struts, and supporting structure that a plane lowers to land, take off, and roll along the ground.
from A plain compound of English roots: "landing," the act of coming down to land, plus "gear," equipment or apparatus — a word that traces back through Middle English to an Old Norse cousin, "gervi," meaning preparation or outfit. The term grew up alongside aviation itself in the early 20th century, when flying machines needed a name for the bits that met the runway.
- weight
- can exceed 6% of an aircraft's total mass
- retraction
- hides up to cut drag and save fuel
- tire pressure
- often over 200 psi, double a truck's
- touchdown force
- absorbs landings via nitrogen-oil shock struts
- gear-up landings
- belly landings happen when pilots forget to deploy
boeing 777 gear collapse — british airways flight 9 landed with no landing gear extension in 1992
gimli glider gear failure — air canada flight 143 lost all hydraulics including landing gear extension in 1983