gp and rollback on TTD

You know, that really is a significant point. However, I would think that each acts independently, so if one fails the whole set won't fail.

Perhaps that would solve the problem.

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Xcelerator- Put the Pedal to the Metal!

The people at Intiman are not as clever as you guys. After three years of designing they havn't thought of all of those scenerios. Especially after having built, tested, and run Xcelerator.

Sorry if im too sarcastic just assuming that the engineers have covered all of the bases.

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One Love

Maybe they have, but Intamin doesn't exactly have a reputation for covering all of the bases.

Don't get me wrong, I'm not saying this will keep me off the ride, and I'm not saying I don't trust Intamin. I'm just curious, because I think the subject matter is interesting, what other backups are in place, if any.

:)

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Steve Guilmette
Mechanical Engineering
UNC Charlotte

Assuming the brakes don't "close" after a failed launch, I believe the train would make contact with the catch wagon. Assuming the dog on the train doesn't get seriously damaged in the collision, I would hope that the launch motor would provide some resistance to stop the train, similar to what aircraft landing on an aircraft carrier use to slow down.

The real question is are the pneumatic cylinders used on the brake fins spring loaded so when no air is applied they are in the up position and is there some sort of failsafe on the valves to raise the brakes in the event of a mishap.

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Scott W. Short, "A-Lister"
scott@midwestcoastercentral.com
http://www.midwestcoastercentral.com

I still think that each brake fin is absolutely independent from each other. Therefore, it would be pretty much impossible for all- or even more than one to fail on a given rollback.

Each has its own pneumatic (or hydraulic) piston to push it up, its not like all are connected. The fins on Xcelerator's launch track come up one at a time, in quick succesion.

I'd find it hard to believe that the whole set could fail at once. Intamin has made mistakes before, but that is such an obvious thing, I'm sure they have taken that into consideration.

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Xcelerator- Put the Pedal to the Metal!

On the Xcelerator tour last week at the Solace, the guide (can't remember his exact title) said that there was a single PLC monitoring whether all the brakes were either up or down. If this single controller malfunctioned, it is possible to have such a mistake.

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Scott W. Short, "A-Lister"
scott@midwestcoastercentral.com
http://www.midwestcoastercentral.com

*** This post was edited by ShiveringTim 3/5/2003 1:06:37 PM ***

I was just curious- what keeps MF's trains from rolling back?

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Well, I used to be able to see TTD from my house, then I moved.
Life's not fair.

I believe the cable on MF is attached in a way that it is impossible for it to detach backward and the cable system has a break that will keep the cable in place or if memory serves me right you hear muffled clicks the whole way up which might be from a standard antiroll back concelled under the track that will keep the "dog" in place in the event of a breakdown but this is a guess I think I heard it in a Discovery Channel program but I'm not sure.

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I don't care what anyone says, Magnum is better then Millenium Force.
*** This post was edited by Touchdown 3/5/2003 1:44:00 PM ***