Cobra rolls and related double inversions
Two half-loops joined by twists — a dramatic pair of inversions that packs intensity into a short stretch of track.
Elements & inversions
A cobra roll (sometimes called a boomerang element in layout talk) typically combines two half-loops with twisting transitions so riders go upside down twice in quick succession. It looks like a snake head in profile and feels like a continuous weave of positive G and rolls.
Related elements include the Immelman (half loop + half twist to exit upright) and dive loop (the reverse entry). Parks and manufacturers mix these names; what matters for riders is the sequence of forces — pull up, twist, pull through — not the exact trademark label.
On an element list, a cobra roll usually means a dense inversion package. Expect less recovery time between upside-down moments than with two spaced vertical loops. Pair that with train type: wing and floorless trains make the same geometry feel more exposed.
Related guides
Inversions and common elements
Loops, corkscrews, and immelmans are building blocks. Knowing the names helps you predict the ride feel.
Vertical loops explained
The classic upside-down circle — how speed, shape, and clothoid transitions keep riders in their seats.
Corkscrews and barrel rolls
Twisting inversions that trade a clean circle for rotation around the track — snappy, lateral, and very common.
Heartline vs centerline rotation
Where the train rotates changes how inversions feel in your head and gut.