Arrow Dynamics started designing roller coasters with which pair of intertwined steel coasters at Disneyland?
Arrow Dynamics Arrow Dynamics was a roller coaster design and manufacturing company based in Clearfield, Utah, United States. Successor to Arrow Development (1946–1981) and Arrow Huss (1981–1986), which were responsible for some of the most influential advancements in the amusement and theme park industries. Among the most significant was tubular steel track, which provided a smoother ride than the railroad style rails commonly used prior to the 1960s on wooden roller coasters. The Matterhorn Bobsleds at Disneyland was Arrow's first foray into roller coasters, in 1959. Arrow and their successors would continue to build trend-setting ride systems for the next 45 years.
Primeval Whirl Primeval Whirl is a steel wild mouse roller coaster at Disney's Animal Kingdom at the Walt Disney World Resort. The ride is a spinning roller coaster purchased from Reverchon Industries. The ride is part of Chester and Hester's Dino-Rama, which is itself part of DinoLand U.S.A. It is a roller coaster in the "Mild But Wild Thrills" category. It has cars that spin in circles while traveling on tracks, permitting the ride experience to vary greatly each time it is ridden. The ride features 13 cars, each seating up to 4 riders.