Definition
A nose-wheel that can be turned left or right by pilot input through the rudder pedals (and sometimes a tiller), allowing directional control of the airplane during taxi, takeoff roll, and landing rollout while on the ground.
Plain English
The front wheel under the nose of the airplane that the pilot can steer with the foot pedals to point the airplane left or right while it is rolling on the ground.
Context Anchor
You encounter this term during touchdown and landing rollout, when the airplane is slowing on the runway and the pilot is keeping it aligned with the runway centerline.
Derivation
‘Steerable’ simply means ‘able to be steered.’ The point of the word here is to distinguish this kind of nose-wheel from a free-castering nose-wheel, which swivels on its own and is not directly steered by the pilot.
Why Pilots Care
Provides precise directional control on the ground, reducing reliance on differential braking and helping maintain runway alignment during takeoff and landing rolls.
Analogy
It is similar to the front wheel on a bicycle: once it is on the ground, turning it helps change where the vehicle points.
Intuition Check
Do not assume the steerable nose-wheel controls the airplane in the air. It helps steer only on the ground, and it should not be forced down immediately after the main wheels touch.
Example Sentence 1
After the main wheels were firmly on the runway, the pilot lowered the nose and used the steerable nose-wheel to track the centerline.
Example Sentence 2
During taxi the student applied light rudder pressure to turn the steerable nose-wheel and follow the yellow centerline.