I was fortunate to ride Drachen Fire in when it first opened in 1992. It may have been an Arrow coaster but it sure didn't seem like an Arrow. Typical Arrows are vertical loops, corkscrews, and boomerangs, but with elements never before found on an Arrow (wraparound corkscrew, batwing/cobra roll, and cutback) made the coaster unique.
I also liked the open trains, also not like a typical Arrow.
X Factor
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SFWoA: An Unofficial Guide
http://sfohio.tripod.com