A heartline roll (sometimes called a barrel roll) is a roller coaster inversion in which the rider performs a 360 degree roll on one axis. Unlike an in-line twist, the elevation of the track changes throughout the inversion to keep the train travelling at the same level.
The heartline roll was introduced by TOGO on their Ultratwister model, the first of which opened in 1984. In 1996, Intamin opened their first two roller coasters with heartline rolls. It has since been used by several companies including Zamperla, Gerstlauer, and Bolliger & Mabillard.
While usually existing on their own, multiple heartline rolls can be strung together. Double heartline rolls feature on Typhoon, a Gerstlauer Euro-Fighter installation, and Outlaw Run, a Rocky Mountain Construction wooden roller coaster. Intamin have included triple and quadruple heartline rolls on their 8-Looping and 10-Looping coasters respectively.
- on the Roller Coaster DataBase.
|Inverting||Banana roll • Batwing • Bent cuban eight • Bowtie • Butterfly • Cobra loop • Cobra roll • Corkscrew • Cutback • Dive drop • Dive loop • Diving turn • Double dip • Fly to lie / Lie to fly • Flying snake dive • Heartline roll • Immelman • Inclined dive loop • Inclined loop • In-line twist • Interlocking corkscrews • Interlocking loops • Lagoon roll • Norwegian loop • Pretzel knot • Pretzel loop • Raven turn • Reverse cobra roll • Reverse sidewinder • Roll over • Saxophone • Scorpion tail • Sea Serpent • Sidewinder • SkyLoop • Step-up under flip • Tongue • Top-Gun stall • Twisted horseshoe roll • Vertical loop • Zero-g roll • Zero-g stall|
|Non-inverting||Hammerhead turn • Helix • High five • Non-inverted loop • Splashdown • Stengel dive • Tilt section • Trick track • Triple dip • Tunnel • Turntable • Vertical drop track • Water brakes • Wave turn|