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V2 Occasional No Holding Brake Malfunction

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Postby wishman35 on August 10th, 2008, 12:43 am
Hey guys just wondering if anyone knows why occasionally on the 2nd time up the back tower I will get no holding brake. It always makes me worried that the ride is malfunctioning.

It has happened to me twice now, and its a bit of a rip since that is one the main thrills of the ride.

Does this happen regularly? I asked two of the ride ops and they didn't know what i was talking about or anything i was saying basically. :( I rarely get a friendly response from any of these ride ops when i ask questions.
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Postby Luxornv on August 10th, 2008, 1:27 am
It happened to me once this season, and I saw it happen a few more times later on that day too. I'm not sure what it is, but I actually like it without the stop on the back spike.
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Postby guitarhero119 on August 10th, 2008, 7:14 am
It only happens when the train doesnt go high enough on the back spike. The computer senses how high the train is and if it isn't high enough it doesn't "grab" the train for structural reasons if I'm not mistaken. The reason it doesn't go as high is because (and I might be mistaken on this) the computer bases its launch speed on the weight of the previous train. Therefore if you have a really light train then a heavier one next cycle it probably wouldn't grab on the back spike.
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Postby SFaddiction84 on August 10th, 2008, 7:25 am
I can not imagin how much stress the "holding of the train" must put on that piece of track, i mean if you notice, the Support Beam for that vertical piece of track stops just before the holding breaks, so i can only imagine that it grabs a heavy train, how much stress that track must have not to lean to that side without breaking, you can see the track sway back and forth slightly after it releases the train again.
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Postby wishman35 on August 10th, 2008, 10:53 am
SFaddiction84 wrote:I can not imagin how much stress the "holding of the train" must put on that piece of track, i mean if you notice, the Support Beam for that vertical piece of track stops just before the holding breaks, so i can only imagine that it grabs a heavy train, how much stress that track must have not to lean to that side without breaking, you can see the track sway back and forth slightly after it releases the train again.


yeah the track does move alot, its a bit nerve wrecking standing there and watching the metal frames shaking as you are about to go on the ride lol
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Postby Jackluver18 on August 10th, 2008, 11:20 am
That happened to me once when it didn't hold, It might have been in October, I can't really remember what month it was.
SF trips 09 = 15
SF trips 10= 11
SF trips 11 =7
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Postby tp41190 on August 10th, 2008, 11:44 am
Image
before

Image
after modifications

Yeah there is a lot of stress on the track. Before the extra supports were added the track would REALLY sway. You could see it sway from across the park. And yes, if the train does not go high enough, or goes too high it wont grab...to protect the LIM and the track. The same way Deja Vu would miscatch.
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Postby SheiKra13 on August 10th, 2008, 11:48 am
How often does that happen?
It's never happened to me.
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Postby Jackluver18 on August 10th, 2008, 12:31 pm
Wow I must be really blind because I never saw that support in front of the brake there, wow don't I feel stupid.
SF trips 09 = 15
SF trips 10= 11
SF trips 11 =7
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Postby wishman35 on August 10th, 2008, 1:11 pm
SheiKra13 wrote:How often does that happen?
It's never happened to me.


ive never seen it happen from watching it, but somehow it has happened to me twice being on the ride. and i have watched it quite a bit.
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Postby CoasterCruiser on August 10th, 2008, 11:43 pm
I just now got back from great america (8/10), and it didn't stop on the tower. I was about to make a topic on this, lol. When did they change the supports?
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Postby Coasternut17 on August 11th, 2008, 7:47 am
I have had this happen to me once too. :)
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Postby sfgamguy on August 11th, 2008, 3:34 pm
when did they add that :?:
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Postby CoasterNick3157 on August 11th, 2008, 6:30 pm
2005
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Postby coasterkidd100 on August 11th, 2008, 11:47 pm
I never noticed the extra supports until you brought it up. And when did V2 start not holding some trains because I was there like a few weeks ago and it never happened?
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Postby wishman35 on August 12th, 2008, 10:45 am
Including my mentioning of it, there has been 3 mentions here, or in trip reports in the past week or so of V2 not holding on the back brake.

Something has to be wrong with V2 because i have barely ever read any mention of it.
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Postby tp41190 on August 12th, 2008, 3:24 pm
Its happened to me twice this year, once last year, once in 2005, and once in 2002.
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Postby UWW-10 on August 13th, 2008, 10:00 pm
As someone mentioned above, if the train doesn't make it high enough on the spike, the breaks won't hold it...it's more or less a safety precaution as we sure don't need the spike snapping like toothpicks if too much force is put on them.

From working on the crew in years past, it happened quite a bit, but there's really nothing maintenance can do . I remember it would happen the most after a downtime/ride reset.

I am surprised that a lim has not completely blown yet this year because that's at least a 3-4 week downtime right there.
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Postby coasterkidd100 on August 13th, 2008, 11:22 pm
^ Has the lim ever blown on V2 before?
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Postby guitarhero119 on August 14th, 2008, 1:43 am
2004 or 2005 a LIM blew if I am not mistaken. It was down for a while.
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Postby coasterkidd100 on August 14th, 2008, 10:35 am
Then, I am surprised that has not blown this year yet.
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Postby Jackluver18 on August 14th, 2008, 10:59 am
I was on it last October when it didn't hold, it was quite weird actually.
SF trips 09 = 15
SF trips 10= 11
SF trips 11 =7
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Postby tp41190 on August 15th, 2008, 1:36 pm
I could have sworn the ride got struck by lightning in 05 and was down through August and September.
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Postby traincrossing9 on August 15th, 2008, 8:28 pm
I would love to see a pic of V2 or an coaster being struck by lightning.
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Postby coasterkidd100 on August 15th, 2008, 9:00 pm
That is why they close coasters when it rains.

And I would love to see a pic of it being struck by lightning too.
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