Its been almost a week and I figured since no one guessed I will post a hint so the game momentum isn't lost.
1. Most people come off the companies coasters with a broken back (over exaggerating but you get what I mean).
2. Only one of these models exist.
Hope these hints helped without giving to much away.
Bisby's Spiral Airship - Queens Park
http://rcdb.com/2427.htm?p=6735
that is the coaster but the photo on rcdb is in black and white.
heres a odd looking one that should keep you busy.
That one is a coaster that was eventually relocated to another park at first thought it was a smaller Pinfari.
Serpent - LeSourdsville Lake Amusement Park
http://rcdb.com/323.htm?p=3871
Those cars actually look a little bit like the haunted mansion doom buggies..... but the front car is one of the weirdest I've seen.
Sahara Twist - Leofoo Village Theme Park
http://rcdb.com/1495.htm?p=42768
here is one that is interesting and yes I have it booked.