Fourth-dimension roller coaster
A fourth-dimension roller coaster is a type of steel roller coaster where riders are rotated independently of the track's orientation, generally about a horizontal axis perpendicular to the track. The cars do not need to be fixed to an angle.
'X²' (formerly 'X') was the first fourth-dimension roller coaster in the world.
Image: Batman The Ride SFFT
Image: Eejanaika coaster Fuji Q 1024
Image: Inferno.inversió
A steel roller coaster is a roller coaster that is defined by having a track made of steel. Steel coasters have earned immense popularity in the past 50 years throughout the world. Incorporating tubular steel track and polyurethane-coated wheels, the steel roller coasters can provide a taller, smoother, and faster ride with more inversions than a traditional wooden roller coaster.
Blue Fire, an inverting launched roller coaster, at Europa-Park, Germany
Dragon Challenge was a unique inverted roller coaster that featured a dueling layout, located at Islands of Adventure in Orlando, Florida
A close-up of the tubular steel tracks of Galactica at Alton Towers
Dorney Park and Wildwater Kingdom's Steel Force and Thunderhawk roller coasters, just outside Allentown, Pennsylvania. Steel Force is the eighth-tallest steel roller coaster in the world with a first drop of 205 feet (62 m) and has a top speed of 75 miles per hour (121 km/h).
