Definition
An aerobatic maneuver in which the airplane is abruptly stalled while yawing rapidly, causing it to autorotate around its longitudinal axis through one or more complete rotations before the pilot recovers. It is essentially a horizontal spin: one wing is fully stalled while the other is flying, producing a fast, violent roll.
Plain English
A quick, forced roll where the airplane is made to stall and spin sideways through the air, rotating all the way around before the pilot stops it.
Context Anchor
Seen in aerobatic training, aircraft operating limitations, and discussions of approved maneuvers.
Derivation
‘Snap’ here means sudden and sharp — the maneuver happens fast and abruptly, unlike a smooth aileron roll. The name reflects how quickly the airplane departs and rotates.
Why Pilots Care
Snap rolls place high structural loads on the airframe and can easily depart into a spin if timing or recovery is imprecise.
Grounding Statement
Picture the airplane being forced into a momentary loss of smooth lift, then whipping around its nose-to-tail line.
Intuition Check
A snap roll is not just any fast roll. If the airplane rolls smoothly from normal roll control, it is not a snap roll; a snap roll involves a deliberate stall and a sharp turning force.
Example Sentence 1
The aerobatic instructor demonstrated a snap roll to the left, entering with full back pressure and rapid rudder.
Example Sentence 2
After completing the snap roll, the pilot rolled out on heading and checked airspeed before the next maneuver.