The Roll-O-Plane, also known as the Bullet is an amusement park ride that originated in America.

It was invented by the Eyerly Aircraft Company of Salem, Oregon, as an updated and more exciting version of the Loop-O-Plane.

[1] The ride consists of a rotating arm mounted to a pivoting hinge on a central support column.

[2] When in motion, the arm swings until it makes a complete loop, though the riders never become inverted.

Second, the cars are free to rotate horizontally or "roll" while the ride is in motion, always keeping the riders right-side-up.