Vekoma Boomerang Question

Sunday, April 13, 2003 8:20 AM
This may have been answered but when the cars get to the top of the hill, how does the anti rollback dog release itself? or in other words, how does it get pulled up, and then released, then pulled up again, then released again?

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I am one.
I am Turbo.

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Sunday, April 13, 2003 8:36 AM
I'm pretty sure there isn't an anti-rollback system on that hill. But if there is, then it is attached to the assembly that the chain is on and just drops down when the train is read to go.

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SFNE Central v4- Online Six Flags New England Resource
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Sunday, April 13, 2003 9:53 AM
There isn't an anti-rollback system on the first lift-hill. The train is hoisted up by a trolley, which will automatically release the train when it hits a metal spike attached to the track near the top of the lift-hill.

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Dutch Coastin' :: European coasters, thrills and theming!

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Sunday, April 13, 2003 6:29 PM
As said above, the train is pulled up the first hill by a small car that attatches to a hitch on the back of the train. When the train reaches the top, the latch lets go of the train.

On the second hill, the train is caught by the chain and oulled up to the top. When the train reaches the top, the chain mechanism drops out of the way, releasing the chain dog and allowing the train to fall back down.

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"Damn The Man! Save The Empire!"
-Mark, Empire Records

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Monday, April 14, 2003 8:49 AM
No need to say it again, really...there are no anti-rollbacks on a Boomerang, for obvious reasons.

The Boomerang does, however, have a safety system that protects the ride in case there is a rollback condition...that is, a premature release from either lift. At the base of the first lift is the station. As the train is being hauled backwards up the first lift, the station brakes are hard-closed, so that if the train breaks loose and comes down the hill, it will hit the station brakes which will slow the train enough to keep it from getting into the first inversion...the train will roll back into the station. As the train approaches the release cam, the station brakes release so that the train can go from the top of Lift #1 all the way through all three inversions.

There is another set of brakes at the base of Lift #2, between Lift #2 and the vertical loop. These brakes close as the train passes them. The train catches the chain lift on Lift #2 using a conventional chain dog. Again, the brakes at the base of Lift #2 are to make sure the train does not have enough energy to make it through the vertical loop if it should break loose early. As the train nears the top of Lift #2, the brakes open, and when the train reaches the top, the entire chain lift mechanism is pulled back away from the bottom of the train, releasing it from the lift.

--Dave Althoff, Jr.

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Monday, April 14, 2003 11:08 AM
Dave covered it all, but I would a bit of philosophy.

Remember that a rollback on a boomerany is not as serious as one on other coaster designs. Since the coaster is designed to reun at speed in either direction the cousequences of a rollback are minimal. About the worst thing that can happen is valleying out in the Cobra roll, something that has happened several times on these coasters.

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Monday, April 14, 2003 1:44 PM

RideMan said:


The Boomerang does, however, have a safety system that protects the ride in case there is a rollback condition...that is, a premature release from either lift. --Dave Althoff, Jr.



Do they all have it? How about the one at Marine World that valleyed? They just put up an emergency staircase in the event it ever happens again.
*** This post was edited by BassHedz 4/14/2003 5:46:49 PM ***

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Monday, April 14, 2003 2:07 PM
SFEG's has an evacuation catwalk on the cobra roll and has the brakes in said positions. So I would think it is safe to assume that all of the Boomerangs have the brakes in said positions. Other things can happen that cause the train to valley in the cobra roll. But I will get to see SFMWs first hand next month, yea me! :)

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J.
Wizards and witches wherever you dwell give us a hint by ring-ing a bell.

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Monday, April 14, 2003 2:38 PM
The one at Marine World vallied in the cobra roll before they had put the stairs in. Now they have the typical stairs there.

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