Definition
A power-off descending maneuver in which the airplane is flown in a continuous, constant-radius turn around a fixed point on the ground while losing altitude at a steady airspeed. The pilot adjusts bank angle throughout the turn to compensate for wind drift, keeping the radius constant relative to the ground reference.
Plain English
A controlled, engine-idle descent in which the airplane circles down around a chosen spot on the ground, keeping the same distance from that spot all the way down.
Context Anchor
Used in steep spiral training and in practice for managing altitude while staying close to a possible landing area.
Derivation
"Gliding" because the engine is at idle and the airplane is descending under its own weight, like a glider. "Spiral" because the flight path traces a coiled, circling shape as it descends — like water going down a drain.
Why Pilots Care
It lets a pilot lose substantial altitude quickly while staying oriented over an airport or landing site, which is useful after an engine failure or when needing to lose height before entering the traffic pattern.
Grounding Statement
Picture the airplane circling downward over one field with the engine at idle.
Intuition Check
A gliding spiral is not an uncontrolled spin or a random circling descent. It is a controlled glide in a planned turning path.
Example Sentence 1
The examiner asked the applicant to perform a gliding spiral around the silo, holding the same radius for three full turns.
Example Sentence 2
The instructor had the student practice a gliding spiral at 45 degrees of bank to demonstrate precise altitude management.