TOGO

This unique concept had rails on the side of the vehicle allowing the coaster to perform true heartline rolls as it navigated the course.

However, TOGO did display a full-circuit model at the IAAPA trade show in the mid-1990s that was capable of making turns, but the ride was never built.

[2] In the fall of 1989, Arrow Dynamics began building a similar concept called the Pipeline, which failed to get past the prototype stage.

[3] TOGO went bankrupt in 2001 due to a lawsuit by Knott's Berry Farm for problems with their Windjammer Surf Racers roller coaster.

The former Windjammer coaster at Knott's berry Farm was a variation of the looping wild mouse; it didn't feature any hairpin turns.