mall coaster inquiry...(mindbender crash 1986)

[thekma...@gmail.com]

You must have this place confused with a roller-coaster enthusiast news group. lol!

[Wolf]

<quinnjo...@gmail.com> wrote in message
news:6b854bec-6838-494c...@googlegroups.com...
> Hi. I wanted to know if anyone out there in coaster land would happen to
> have a copy of the mall coaster inquiry in reference to the Mindbender
> roller coaster crash that happened in 1986? I attempted to buy it in eBay
> just recently, and that didn't seem to work out, I never got it. Also
> dont know of anyone who will get it through Milwaukee interlibrary loan.
> I've had it - so I want to know if there's anyone out there who has the
> entire text of it, or where I could find the entire thing online. Please
> someone out there share a solution
> here. Thank you much, Quinn.

I'd send you to the TSSA, but they seem to be Ontario only.

--
|\-/|
<0 0>
=(o)=
-Wolf

[JonJon]

I know I had it. It may be backed up. If I find it will post to this message.

[JonJon]

Does this help at all?


Transcript of The Mindbender Fantasy Roller Coaster Accident in Canada
The Mindbender Fantasy Roller Coaster Accident in Canada
Noor Ahmed Herzallah
920013742
Outline
Introduction

Accident Description and Details

HSE Issues and Developments Before and After the Accident

Conclusion
Mindbender Roller Coaster:

Largest coaster; 12 Stories high

Longest and fastest

Triple loop coaster

Located inside a shopping mall in Canada

Surpassed by Ferrari World located in Abu Dhabi

Mindbender designed by Werner Stengel and built by Anton Schwarzkoph

Design based on a portable coaster designed by Dreier Looping
Introduction
Ride Description
Movement description

Multiple twisting drops

Three vertical loops

Double helix finale

Twists occur between ride structure and mall pillars

Under high demand:

Last car is inverted
Safety consideration
Safety is ensured by:

All riders have seat belts buckled up

Shoulder restraints lowered

Heights ranged between 59" and 77"
Ride Movement Analysis
Overall ride length: 1:13 - 1:18

Extensive rail waxing: ride length down to 59 seconds

Not permitted in public rides; forces of riders become more severe

Maximum speed: 60 mph

Maximum G-force: 5.5 Gs

Obtained during second vertical loop
Accident Description and Details
Evening of 14th of June, 1986:

Assembly was separated from tack fully occupied

Last train was fishtailing widely and separated from the rail

Loss in coaster speed and passengers were thrown off

Coaster entered third and final loop with not enough speed

Coaster paused at the top and slid backwards

Before the accident:

Roller coaster was shut down twice due to metallic noise coming out of it

Cars were run empty to find source of sound

Nothing was found; maintenance staff decided it was safe to operate

Ride continued until accident occurred

After the accident:

Investigations revealed that issues happened when the operational and maintenance information were translated from German to English

Additional problems in quality control

Manufacturer was bankrupt during ride delivery



Main causation of the accident:

Ways in which each six wheeled car was fastened to axle

Car spun horizontally to a vertical axis, which was affixed to main axle and connected each pair of car assemblies

Cap plate used to join cars to vertical axle above track in ¼” clearance and secured with 4 hex head cap screws

Retaining plate released; cap screws were loose

Cap plate not able to keep car attached to vertical axle

At uplift area, car was derailed throwing victims at height of 25 feet

Inspection held by Alberta province safety inspector one day before accident

Ride is safe of operate

Witnesses mentioned that ride was closed 30 minutes before accident and inspection team were working on derailed cars

Ride had 12 occupants when derailed and 19 people were seriously injured


Investigation Findings

Missing bolts in inside part of left wheel assembly of last train

Cars were only visually inspected

Mindbender crews not supplied with inspection order from General Safety Divisions of Germany

¼ of all axle bolts on cars were loose

Restraint systems were inadequate

No safety checks done by German organization


Investigation findings, Recommendations and HSE Developments After the Accident

Recommendations and HSE Developments After the Accident

All cars were redesigned 7 months after accident

Coaster consisted of 3 cars instead of 4

Every car had 4 bogeys on 2 axles

Anti-roll back system was added

Ride capacity reduced from 16 to 12

Seat belts and shoulder restraints were added

Vertical axle became a fixed part of the bogey

Retaining bolt was moved to top of the axle

Maintenance checks and periodic downtimes were increased


Investigation findings, Recommendations and HSE Developments After the Accident

Brief introduction to ride history was explained

Accident description and details were extensively elaborated and analyzed

Causations of accident were mentioned

Recommendations and HSE issues and developments were explained

Conclusion

[thekma...@gmail.com]

Too bad the orig. poster deleted his query - I'm sure in his mind it doesn't help the credibility of RRC.

[quinnjo...@gmail.com]

that was a mistake that I had deleted it. if it is possible I still would like to see the entire original report I hear there's 200 something pages in it