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[[File:Barrel roll diagram side view.jpg|thumb|A diagram of a barrel roll]]
[[File:Barrel roll 1.webm|thumb|A barrel roll from the perspective of the wingtip]]
A '''barrel roll''' is an aerial maneuver in which an [[airplane]] makes a complete [[rotation]] on both its longitudinal and lateral axes, causing it to follow a [[helix|helical]] path, approximately maintaining its original direction. It is sometimes described as a "combination of a loop and a [[Aircraft principal axes#Longitudinal axis (roll)|roll]]".<ref>{{cite web |url=https://www.iac.org/legacy/aerobatic-figures |title=Aerobatic Figures |work=[[International Aerobatic Club]] }}</ref> The [[g-force]] is kept positive (but not constant) on the object throughout the maneuver, commonly between 2 and 3''g'', and no less than 0.5''g''. The barrel roll is commonly confused with an [[aileron roll]].
==Etymology==
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