jwhoogs, where did you see the video, send me a private message if you can. That ride looks completely insane.
gomez, where does Wildcat reach more g's than that MF? The first drop and first turn pulls some mean g forces that a lot of people grey out from.
Just as much if not more than a ride on the pre-2007(2006?) Son Of Beast.
That last curve has a whiplash ("jerk" - a change in acceleration, physically) moment. It's scary.
Many people don't fully understand how it all works. Very few realize that for example WildCat at Cedar Point pulls more g's than Millennium Force.
It's the same idea that Thriller, a coaster that's 113ft tall can pull +6.5Gs, while at 260ft Fujiyama only pulls a max of +3.5Gs.
I'm not saying it isn't true, I'd just like to see some actual numbers. I've ridden both many times and never thought Wildcat was that forceful no matter how short the period of force is.
I know quite a good amount about mechanical engineering, and I'm going to have to back Gomez up.
ASTM F 2291-06a:7 establishes limits for accelerations as measured in accordance with ASTM F 2137 and filtered at 5 Hz. Rides can be designed to provide accelerations outside the limits specified in 2291-06a:7 provided that justification is given via a review by a biodynamic expert. Limits specified in F 2291-06a apply only to sustained accelerations lasting longer than 200 milliseconds (0.2 seconds) and to riders who are at least 48" tall.
The actual limits are specified in F 2291-06a:7 by means of Figures 6-20, and are actually quite complicated, taking into consideration the orientation of the rider, the direction, magnitude, and time limit for the acceleration, and also gives some guidance on reversals.
The nature of the ASTM license and the complexity of the material precludes me from posting details here, but there's enough information there that you can look it up. The diagrams are very similar to (possibly identical to) those used in the New Jersey statute.
Does that answer your question? 8-)
BTW: Physics-day experiments involving homemade mass-spring accelerometers have revealed that indeed, Wildcat produces higher forces than Millennium Force. A group of students proclaimed to me that they had measured +6G on Wildcat. I don't know if I believe that, but I can believe that Wildcat generates higher forces than Millennium Force.
--Dave Althoff, Jr.
Member, ASTM Committee F-24 on Amusement Rides and Devices
*** Edited 4/3/2008 6:06:10 PM UTC by RideMan***
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