This is probably the most unusual new coaster type I was working on. A lot of progress was made and I even had a preview image but like most of my stuff it was never finished.
Yes, the pipeline coaster was a ride that Arrow was working on in the early 90s. Only a short prototype layout was built. One was considered for Alton Towers, but John Wardley did not like the ride and decided to go with a B&M invert instead.