Alan Schilke is an American engineer and roller coaster designer based in Hayden, Idaho, United States. He first made his mark on the industry by designing the 4th Dimension roller coaster, X2, while working with Arrow Dynamics. Schilke now works as a design engineer at Ride Centerline LLC and occasionally works with Rocky Mountain Construction (RMC).
X at Six Flags Magic Mountain
The New Texas Giant at Six Flags Over Texas
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