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Dar

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Posts posted by Dar

  1. It appears that this policy/procedure didn't exist on Smiler (among others) and that's why the park is at fault instead of the control system.

     

    Just to pick up on this, not attacking you directly, but the report says the ride was put into "Evacuation mode", not maintenance mode, when the crash happened. Evac mode moves all the train back to the station, starting with the furthest away but still obeys other block rules

  2. There's a .zip folder at the bottom of this page http://press.hse.gov.uk/2016/alton-towers-owners-fined-over-smiler-crash/ that contains the CCTV footage and the expert witness report that details exactly what went wrong and why. Warning, it's 250 pages of the driest reading you've ever seen unless you do this for a living! Unfortunately it's been redacted to remove statements, names and other identifiable/confidential information. So appendices 1 and 2 are blank.

     

    If you watch the CCTV, you can see that the empty train was stuck at the top of the batwing for 20 seconds before rolling back into the valley. It's crazy to think that if the wind had been blowing in the opposite direction that day, none of this would have ever happened!

     

    Interesting to note that no issues were found with the operators or their working practices. (p21, pa. 48) It was 2 different engineers that weren't aware/told of the 5th train being added to the system and it was one of these that cleared the block, clearing this block is what allowed the full train to be sent under "evacuation mode", supposedly to get the riders off safely and get all the trains back into the station. (p5, pa. 10 - p7, pa. 15) He states that the ride and control system itself were robustly designed with an emphasis of "failing to safety". (p. 18, pa. 41) He wasn't happy with the training of engineers, with a lot of it being observational with little to no formal training.(p22, pa. 52)

     

    He lists the errors that lead to the crash from page 25, paragraph 54. It seems 2 engineers weren't told about the 5th train, they didn't check the log book (because there was no official procedure to compel them to), so they were unaware of the 5th train. Having seen 3 trains in the station/brakes and the 4th train at the top of the lift, the engineer was satisfied he knew where all 4 trains were and cleared the block without checking the track because he felt there was no need because he had already accounted for all the trains he was aware of. Not to mention that he was under financial pressure to get the ride back open as quick as possible, with bonuses offered for minimal downtime and clocks in the op cabin to keep track of up/downtime.

     

    All in all, a bit of a clusterf*ck.

  3. ^^-- no I think it was just for a smooth ride. When Hypersonic was in its original prototype state before being installed at KD it had giant drag car slicks for the back tires!!!

     

     

    There was an S&S documentary that went through the development of the launch coasters of the time and this was the reason they gave, including images of the polyurethane wheels they'd tried before!

     

  4. The European Coaster Club posted a message on their Facebook page that the park are struggling to get this open for the 18th, even going so far as to ask the ECC to recommend members don't book any flights yet, just in case. They've also said that there won't be a press event because of the construction delays.

     

    Looks like they're in for plenty of long days and even longer nights getting this ready!

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