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- From: maglione@media.mit.edu (Tom Maglione)
- Newsgroups: rec.roller-coaster
- Subject: Re: Shuttle Loopers (was Re: Drachen Fire at Busch Gardens, VA
- Summary: Some answers.
- Keywords: drachen fire
- Message-ID: <1992Aug31.171717.23007@news.media.mit.edu>
- Date: 31 Aug 92 17:17:17 GMT
- References: <4060@novavax.UUCP> <1992Aug31.142933.6505@pmafire.inel.gov> <1992Aug31.154813.4424@usl.edu>
- Sender: news@news.media.mit.edu (USENET News System)
- Distribution: rec
- Organization: MIT Media Laboratory
- Lines: 39
-
- In article <1992Aug31.154813.4424@usl.edu> rhb@ucs.usl.edu (Bird Rendell H.) writes:
- >(Geoff Allen quotes deleted)
- >I wonder if someone out there knows more about these wonderful
- >beasties than I do...it seemed to me that the Tidal Wave was
- >different from Greezed Lightnin' and Montezooma's Revenge. It
- >seemed to have some kind of counter-weight, and the train
- >gained momentuem all the way to the loop -- whereas G.L. and
- >M.R. both start VERY STRONG but begin to lose speed
- >just before the loop.
- >
- Well, Rendell, I think I have the answer. Actually there are two different
- propulsion systems in use on the aforementioned shuttle loop rides. The two
- types are flywheel momentum and falling counterweight. The flywheel momentum
- method involves a huge multi-ton flywheel which is brought up to some
- steady-state speed while the ride is operating and the passengers are unloading
- and loading. When everything is ready, the spinning flywheel is attached to
- the train with some cabling system, I believe, which then brings the train
- up to speed while constantly losing momentum on the flywheel. The falling
- counterweight does just what it sounds like: there is a multi-ton counterweight
- usually housed in the far tower that is the part of the ride that you face
- when you are seated. While the ride is operating and the trains are unloading
- and loading the passengers, the weight is hoisted up in the tower. When all
- passengers are restrained and the restraints have been checked, riders on
- shuttle loops with this type of propulsion notice a slight jolt while the
- brakes are still applied; this happens because all of the slack is being taken
- out of the cabling system connecting a small push-cart on the track behind
- the train with the counterweight system in the tower. Then, simultaneously,
- the brakes are released and weight is dropped, and the acceleration does
- continue more on this type than on the flywheel type. IMHO, this mechanism
- is more fun to ride on than the other type. Also, on older Arrow shuttle
- loops, where you had to climb a tower to load/unload from the train, the
- small pushcart used to propel the train out of the station there had been
- adapted from the similar mechanisms used on the decks of aircraft carriers
- for launching aircraft off the deck. BTW, I don't recall which types of
- propulsion systems are used on the rides you mentioned (although I have
- ridden all of them), but your description fairly well clinches the type
- accordingly.
-
- Tom "I like 'em technical" Maglione
-