landing gear
LowTechnical/Aviation
Definition
Meaning
The undercarriage of an aircraft, including wheels, skids, or floats, used for takeoff and landing.
The essential structural and mechanical system that supports an aircraft on the ground and absorbs the impact of landing; can refer to the entire assembly of struts, wheels, brakes, and retraction mechanisms.
Linguistics
Semantic Notes
A fixed compound noun. Refers specifically to aircraft; metaphorical use for other vehicles (e.g., spacecraft) is possible but technically an extension of the core meaning.
Dialectal Variation
British vs American Usage
Differences
No difference in referent. 'Undercarriage' is a traditional British synonym that is becoming less common even in the UK, largely replaced by 'landing gear' in modern aviation discourse.
Connotations
Both 'landing gear' and 'undercarriage' are purely technical and neutral. 'Landing gear' is the unambiguous international standard.
Frequency
'Landing gear' is overwhelmingly dominant in both American and contemporary British English. 'Undercarriage' retains slight historical preference in some UK maintenance/engineering contexts but is declining.
Vocabulary
Collocations
Grammar
Valency Patterns
The [AIRCRAFT]'s landing gear [VERB][VERB] the landing gearlanding gear [PREP] the [AIRCRAFT]Vocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Rare, except in aviation industry reports, e.g., 'The contract is for the supply of new landing gear components.'
Academic
Used in engineering, physics, and materials science papers related to aerospace design, stress analysis, and hydraulic systems.
Everyday
Used by passengers and general public when discussing visible parts of a plane or in news reports about aviation incidents.
Technical
The primary register. Used by pilots, air traffic controllers, engineers, and mechanics in precise operational and maintenance contexts.
Examples
By CEFR Level
- The plane's landing gear has many wheels.
- Look, the landing gear is coming down!
- The pilot lowered the landing gear as we approached the airport.
- After takeoff, you hear a noise when the landing gear goes up.
- A fault in the landing gear mechanism forced the aircraft to make an emergency landing.
- Engineers are inspecting the main landing gear for signs of stress fatigue.
- The novel design features a retractable landing gear that reduces drag by 15%.
- Forensic analysis concluded that the accident was caused by a catastrophic failure of the nose landing gear trunnion.
Learning
Memory Aids
Mnemonic
Imagine a plane LANDING; the GEAR (equipment) it needs to touch the ground safely is its wheels and legs—the landing gear.
Conceptual Metaphor
THE AIRCRAFT IS A BIRD/WALKING ENTITY (it 'extends its legs' for landing).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'gear' as 'шестерня' (cogwheel). The correct equivalent is 'шасси' (shassi).
- The phrase is a fixed compound; do not translate word-for-word as 'посадочная передача'.
Common Mistakes
- Spelling as one word: 'landinggear'.
- Using plural 'gears' (it is usually uncountable in this context: 'The landing gear is damaged.').
- Confusing with 'landing strip' (the runway).
Practice
Quiz
What is the primary function of an aircraft's landing gear?
FAQ
Frequently Asked Questions
Yes, they are synonyms. 'Landing gear' is the more modern and internationally standard term, while 'undercarriage' is a traditional British term now used less frequently.
Yes, helicopters also have landing gear, which can be wheels, skids, or floats, depending on the model and its operating environment.
These are standard radio communications meaning 'retract the landing gear' after takeoff and 'extend/deploy the landing gear' before landing, respectively.
No. It is extended only for ground operations, takeoff, and landing. During cruise flight, it is retracted into the aircraft's fuselage or wings to reduce aerodynamic drag.