It would be like balancing a Toyota on a toothpick. In other words, probably never going to happen.
------------------ Rob - Who believes it is possible to like both Cedar Point and SFWoA... "A gun is not a weapon Marge, it's a tool. Like a butcher knife, or a harpoon, or... or an alligator" ~Homer J. Simpson
Probably as likely as any other coaster getting stuck at the top of a hill... meaning, not at all. Try balancing a marble on top of a basketball and you'll see.
The closest I've ever heard of was Demon at SFGam getting stuck upside down in its vertical loop. FOF at PKD also got stuck with at least part of the train upside down once, but if I'm not mistaken that was technically a valley. Also, if I remember correctly, it was with a bunch of ACErs who had either just gotten married or renewed their vows. Anyone else remember this?
The chances are small but there is a chance it could happen. Just like how a coaster could get stuck in a loop, meaning the train stopped right as its weight was equal on both sides of the loop. I always wondered what they do in those situations.
------------------ "Do what you believe in and believe in what you do," Jeffrey E. McCants
I agree there is a chance. But I think you are considerablly more likely to win the powerball lottery, have your car destroyed by a freak meteorite accident, get nine holes-in-one breaking a 20 year record at the miniature golf course, and then get struck by lightning as you raise your putter in celebration.
It happened during initial full power tests. It was rumored to be around test number 100, but was never confirmed. Monty Jasper, however, was quoted as saying it did stall at the top during testing. They rode up to the top, and just pushed it a bit. Odds are it will only happen once every season or so. It'sjust as likely to happen to Xcelerator, Hypersonic, or Volcano:TBC. Does it happen? Well this is the first we've heard of it. ------------------ Jes Jes's Roller CoastersDJ Jes Six Flags Worlds Of Adventure Ride-Ops Crew 2002-2003(Find Me, Win a prize!)
Phyter said: I agree there is a chance. But I think you are considerablly more likely to win the powerball lottery, have your car destroyed by a freak meteorite accident, get nine holes-in-one breaking a 20 year record at the miniature golf course, and then get struck by lightning as you raise your putter in celebration.
I'll go out on a limb and say that it will never happen with a train load of real, live passengers. Why? Because for the train to balance like that on the top of the hill, those passengers would have to sit infuriatingly still. It wouldn't take much to get it moving again.
Unless, of course, something went dreadfully wrong with the pusher pin and the train was biased backward. But I think there is enough clearance that the pin won't catch on the track ties.... (that's how the Schwarzkopf shuttle loop got stuck in a loop...the pusher plate caught a track tie)
It wouldn't require much wind or other force either to get the train to roll one way or the other. Alternatively, it could result from a lost wheel like Mamba has been known to do or (from what I understand) the Demon incident was a result of.
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I just got back from the park today and it nearly happened again. It happened durring morning testing and they launched an empty train and at the top of the hill it just stopped. The train was up there for around 10 seconds before the wind blew the train back down the hill. So if it wasn't for the wind, it might have stayed up there for a while.
ApolloAndy, based on the result of the incident and on the change made to Arrow multi-element trains after the Demon incident, I am pretty sure it wasn't the loss of a single wheel, but rather the loss of an assembly holding ten wheels. The axle assembly (with four road wheels, four guide wheels, and two up-stop wheels) is attached to the back of the last car by means of a single pin (pivot shaft) with a castle nut and cotter key. The loss of the nut would cause the entire axle to drop off the back of the train.