A vertical loop is a roller coaster element in which the track makes a 360 degree oval shape vertically, as opposed to a horizontal loop which is essentially a helix. Inverting riders once, it is the first known inversion and the most common today.
A relatively new element is the non-inverted loop which is shaped like a vertical loop, however the track continually twists in such a way that riders are never inverted.
History[edit | edit source]
The first vertical loops were built in the 19th century. However they suffered from intense forces due to their circular shape.