Definition
An airplane with a landing gear arrangement consisting of two main wheels positioned aft of the center of gravity and a single nosewheel forward of the center of gravity. This configuration keeps the fuselage roughly level on the ground and places the nosewheel under the engine and forward fuselage.
Plain English
An airplane that sits level on the ground with one wheel at the front and two wheels further back under the wings or fuselage.
Context Anchor
You will see this term when discussing takeoffs, landings, taxiing, and the after-landing roll, especially when comparing nosewheel airplanes with tailwheel airplanes.
Derivation
Named after the children's tricycle, which has the same three-wheel layout: one wheel in front and two wheels behind. The picture matches the airplane's gear arrangement closely enough that the name stuck.
Why Pilots Care
The nosewheel gives good directional stability and easier steering on the ground, which reduces the chance of a ground loop during crosswind landings.
Intuition Check
Do not read “tricycle-geared” as meaning the airplane has bicycle parts or gear-shifting machinery. Here, “geared” means equipped with landing gear, and “tricycle” means the wheels are arranged with one wheel in front and two main wheels behind.
Example Sentence 1
Most modern training airplanes, including the Cessna 172 and Piper Cherokee, are tricycle-geared airplanes.
Example Sentence 2
Flight schools prefer tricycle-geared airplanes because students can see over the nose and steer easily during taxi and takeoff.