Even though the ride today is far from anything spectacular, I have to say the PKI Racer. When it was installed in 1972, this coaster single-handedly rejuvinated interest in wooden coasters.
The 40's 50's and 60's were pretty mediocre years in terms of roller coasters. Only the occasional Comet, Mister Twister, or Thunderbolt were built. Coasters, it seemed, were entertainments of the past. Particularly in the early 70's, it looked like wooden roller coasters (since the invention of tubular steel track) were dying. The opening of Kings Island and the Racer changed that, rejuvinating national interest in amusement parks and wooden coasters.
Just look at all the Racer copies that were built later in the decade (Rebel Yell, Rolling Thunder, and even to some degree, the American Eagle) and the slew of John Allen out-and backs that were built in the 70's. What these rides did was prove that wooden coasters have a special quality that steel just can't match, and wooden coasters continued to prosper even through the advent of the inversion in steel coasters.
Even though it doesn't look like much today, the Racer was a big deal when it was built in 72, and because of it, we can enjoy our CCI's today. Without the Racer, wooden coasters just may have faded into becoming a thing of the past.
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Coasters...the best natural buzz available.
*** This post was edited by MooreOn on 12/7/2000. ***