Plain English Meaning
A ground loop is when an airplane rolling on the ground suddenly swings sideways and spins around hard, like a car fishtailing into a spin. It usually happens during landing or takeoff and can damage the wingtip or landing gear.
Full Definition
An uncontrolled, rapid horizontal rotation of an airplane on the ground around its vertical axis, typically occurring during the takeoff roll or landing rollout. Most common in tailwheel airplanes, a ground loop develops when the tail begins to swing sideways and the pilot fails to correct it in time, allowing the swing to accelerate until the airplane pivots sharply, often resulting in a wingtip strike, landing gear damage, or a tipover.
Context Anchor
You will meet this term in taxiing, takeoff roll, and landing rollout discussions, especially when learning about tailwheel airplane handling.
Derivation
The term combines 'ground' (where the event happens — the airplane is not flying) and 'loop' (a tight, circular path). It describes the airplane tracing a sharp loop on the ground rather than rolling straight.
Why Pilots Care
A ground loop can damage landing gear, cause a runway excursion, or lead to injury, especially in crosswinds or with tailwheel aircraft.
Grounding Statement
Picture the airplane beginning to swerve on the runway, then swinging farther because the motion was not stopped early.
Intuition Check
A ground loop is not a loop in the air and does not mean the airplane goes upside down.
Here, “loop” means a sharp, uncontrolled turning path on the ground.
Example Sentence 1
The student pilot relaxed on the rudder pedals during the landing rollout and the airplane began to ground loop before the instructor could intervene.
Example Sentence 2
Strong crosswinds on the runway increase the chance of a ground loop if directional control is not maintained.